This patch adds SPL code for the M28 board.
Signed-off-by: Marek Vasut marek.vasut@gmail.com Cc: Andy Fleming afleming@gmail.com Cc: Stefano Babic sbabic@denx.de Cc: Wolfgang Denk wd@denx.de Cc: Detlev Zundel dzu@denx.de --- board/denx/m28evk/Makefile | 8 + board/denx/m28evk/m28_init.h | 41 ++ board/denx/m28evk/mem_init.c | 213 +++++++++ board/denx/m28evk/mmc_boot.c | 273 ++++++++++++ board/denx/m28evk/power_init.c | 913 ++++++++++++++++++++++++++++++++++++++ board/denx/m28evk/start.S | 396 +++++++++++++++++ board/denx/m28evk/u-boot-spl.lds | 87 ++++ board/denx/m28evk/u-boot.bd | 14 + include/configs/m28evk.h | 8 + 9 files changed, 1953 insertions(+), 0 deletions(-) create mode 100644 board/denx/m28evk/m28_init.h create mode 100644 board/denx/m28evk/mem_init.c create mode 100644 board/denx/m28evk/mmc_boot.c create mode 100644 board/denx/m28evk/power_init.c create mode 100644 board/denx/m28evk/start.S create mode 100644 board/denx/m28evk/u-boot-spl.lds create mode 100644 board/denx/m28evk/u-boot.bd
V2: Make waiting for powerswitch to be pressed configurable V3: Squash checkpatch warning V4: Configure DUART on PWM pins for V1.1 module V5: Drop clean and distclean targets
diff --git a/board/denx/m28evk/Makefile b/board/denx/m28evk/Makefile index e6aba9a..47229e6 100644 --- a/board/denx/m28evk/Makefile +++ b/board/denx/m28evk/Makefile @@ -25,7 +25,13 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(BOARD).o
+ifndef CONFIG_SPL_BUILD COBJS := m28evk.o +endif + +ifdef CONFIG_SPL_BUILD +COBJS := mem_init.o mmc_boot.o power_init.o +endif
SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) @@ -33,6 +39,8 @@ OBJS := $(addprefix $(obj),$(COBJS)) $(LIB): $(obj).depend $(OBJS) $(call cmd_link_o_target, $(OBJS))
+all: $(ALL) + #########################################################################
# defines $(obj).depend target diff --git a/board/denx/m28evk/m28_init.h b/board/denx/m28evk/m28_init.h new file mode 100644 index 0000000..98d3631 --- /dev/null +++ b/board/denx/m28evk/m28_init.h @@ -0,0 +1,41 @@ +/* + * Freescale i.MX28 SPL functions + * + * Copyright (C) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * 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 + */ + +#ifndef __M28_INIT_H__ +#define __M28_INIT_H__ + +void early_delay(int delay); + +void mx28_power_init(void); + +#ifdef CONFIG_SPL_MX28_PSWITCH_WAIT +void mx28_power_wait_pswitch(void); +#else +static inline void mx28_power_wait_pswitch(void) { } +#endif + +void mx28_mem_init(void); + +#endif /* __M28_INIT_H__ */ diff --git a/board/denx/m28evk/mem_init.c b/board/denx/m28evk/mem_init.c new file mode 100644 index 0000000..066fe0d --- /dev/null +++ b/board/denx/m28evk/mem_init.c @@ -0,0 +1,213 @@ +/* + * Freescale i.MX28 RAM init + * + * Copyright (C) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * 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 <config.h> +#include <asm/io.h> +#include <asm/arch/iomux-mx28.h> +#include <asm/arch/imx-regs.h> + +#include "m28_init.h" + +uint32_t dram_vals[] = { + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000100, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00010101, 0x01010101, 0x000f0f01, 0x0f02020a, + 0x00000000, 0x00010101, 0x00000100, 0x00000100, 0x00000000, + 0x00000002, 0x01010000, 0x05060302, 0x06005003, 0x0a0000c8, + 0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612, 0x02030202, + 0x00c8001c, 0x00000000, 0x00000000, 0x00012100, 0xffff0303, + 0x00012100, 0xffff0303, 0x00012100, 0xffff0303, 0x00012100, + 0xffff0303, 0x00000003, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000612, 0x01000F02, 0x06120612, 0x00000200, + 0x00020007, 0xf5014b27, 0xf5014b27, 0xf5014b27, 0xf5014b27, + 0x07000300, 0x07000300, 0x07000300, 0x07000300, 0x00000006, + 0x00000000, 0x00000000, 0x01000000, 0x01020408, 0x08040201, + 0x000f1133, 0x00000000, 0x00001f04, 0x00001f04, 0x00001f04, + 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00010000, 0x00020304, 0x00000004, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x01010000, 0x01000000, 0x03030000, 0x00010303, + 0x01020202, 0x00000000, 0x02040303, 0x21002103, 0x00061200, + 0x06120612, 0x04320432, 0x04320432, 0x00040004, 0x00040004, + 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00010001 +}; + +void init_m28_200mhz_ddr2(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(dram_vals); i++) + writel(dram_vals[i], MXS_DRAM_BASE + (4 * i)); +} + +void mx28_mem_init_clock(void) +{ + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + /* Gate EMI clock */ + writel(CLKCTRL_FRAC0_CLKGATEEMI, + &clkctrl_regs->hw_clkctrl_frac0_set); + + /* EMI = 205MHz */ + writel(CLKCTRL_FRAC0_EMIFRAC_MASK, + &clkctrl_regs->hw_clkctrl_frac0_set); + writel((0x2a << CLKCTRL_FRAC0_EMIFRAC_OFFSET) & + CLKCTRL_FRAC0_EMIFRAC_MASK, + &clkctrl_regs->hw_clkctrl_frac0_clr); + + /* Ungate EMI clock */ + writel(CLKCTRL_FRAC0_CLKGATEEMI, + &clkctrl_regs->hw_clkctrl_frac0_clr); + + early_delay(11000); + + writel((2 << CLKCTRL_EMI_DIV_EMI_OFFSET) | + (1 << CLKCTRL_EMI_DIV_XTAL_OFFSET), + &clkctrl_regs->hw_clkctrl_emi); + + /* Unbypass EMI */ + writel(CLKCTRL_CLKSEQ_BYPASS_EMI, + &clkctrl_regs->hw_clkctrl_clkseq_clr); + + early_delay(10000); +} + +void mx28_mem_setup_cpu_and_hbus(void) +{ + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + /* CPU = 454MHz and ungate CPU clock */ + clrsetbits_le32(&clkctrl_regs->hw_clkctrl_frac0, + CLKCTRL_FRAC0_CPUFRAC_MASK | CLKCTRL_FRAC0_CLKGATECPU, + 19 << CLKCTRL_FRAC0_CPUFRAC_OFFSET); + + /* Set CPU bypass */ + writel(CLKCTRL_CLKSEQ_BYPASS_CPU, + &clkctrl_regs->hw_clkctrl_clkseq_set); + + /* HBUS = 151MHz */ + writel(CLKCTRL_HBUS_DIV_MASK, &clkctrl_regs->hw_clkctrl_hbus_set); + writel(((~3) << CLKCTRL_HBUS_DIV_OFFSET) & CLKCTRL_HBUS_DIV_MASK, + &clkctrl_regs->hw_clkctrl_hbus_clr); + + early_delay(10000); + + /* CPU clock divider = 1 */ + clrsetbits_le32(&clkctrl_regs->hw_clkctrl_cpu, + CLKCTRL_CPU_DIV_CPU_MASK, 1); + + /* Disable CPU bypass */ + writel(CLKCTRL_CLKSEQ_BYPASS_CPU, + &clkctrl_regs->hw_clkctrl_clkseq_clr); +} + +void mx28_mem_setup_vdda(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + writel((0xc << POWER_VDDACTRL_TRG_OFFSET) | + (0x7 << POWER_VDDACTRL_BO_OFFSET_OFFSET) | + POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW, + &power_regs->hw_power_vddactrl); +} + +void mx28_mem_setup_vddd(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + writel((0x1c << POWER_VDDDCTRL_TRG_OFFSET) | + (0x7 << POWER_VDDDCTRL_BO_OFFSET_OFFSET) | + POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW, + &power_regs->hw_power_vdddctrl); +} + +void mx28_mem_init(void) +{ + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + struct mx28_pinctrl_regs *pinctrl_regs = + (struct mx28_pinctrl_regs *)MXS_PINCTRL_BASE; + + /* Set DDR2 mode */ + writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2, + &pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set); + + /* Power up PLL0 */ + writel(CLKCTRL_PLL0CTRL0_POWER, + &clkctrl_regs->hw_clkctrl_pll0ctrl0_set); + + early_delay(11000); + + mx28_mem_init_clock(); + + mx28_mem_setup_vdda(); + + /* + * Configure the DRAM registers + */ + + /* Clear START bit from DRAM_CTL16 */ + clrbits_le32(MXS_DRAM_BASE + 0x40, 1); + + init_m28_200mhz_ddr2(); + + /* Clear SREFRESH bit from DRAM_CTL17 */ + clrbits_le32(MXS_DRAM_BASE + 0x44, 1); + + /* Set START bit in DRAM_CTL16 */ + setbits_le32(MXS_DRAM_BASE + 0x40, 1); + + /* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */ + while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20))) + ; + + mx28_mem_setup_vddd(); + + early_delay(10000); + + mx28_mem_setup_cpu_and_hbus(); +} diff --git a/board/denx/m28evk/mmc_boot.c b/board/denx/m28evk/mmc_boot.c new file mode 100644 index 0000000..86d3ab5 --- /dev/null +++ b/board/denx/m28evk/mmc_boot.c @@ -0,0 +1,273 @@ +/* + * Freescale i.MX28 Boot setup + * + * Copyright (C) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * 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 <config.h> +#include <asm/io.h> +#include <asm/arch/iomux-mx28.h> + +#include "m28_init.h" + +/* + * This delay function is intended to be used only in early stage of boot, where + * clock are not set up yet. The timer used here is reset on every boot and + * takes a few seconds to roll. The boot doesn't take that long, so to keep the + * code simple, it doesn't take rolling into consideration. + */ +#define HW_DIGCTRL_MICROSECONDS 0x8001c0c0 +void early_delay(int delay) +{ + uint32_t st = readl(HW_DIGCTRL_MICROSECONDS); + st += delay; + while (st > readl(HW_DIGCTRL_MICROSECONDS)) + ; +} + +#define MUX_CONFIG_LED (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL) +#define MUX_CONFIG_LCD (MXS_PAD_3V3 | MXS_PAD_4MA) +#define MUX_CONFIG_TSC (MXS_PAD_3V3 | MXS_PAD_8MA | MXS_PAD_PULLUP) +#define MUX_CONFIG_SSP0 (MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_PULLUP) +#define MUX_CONFIG_SSP2 (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_PULLUP) +#define MUX_CONFIG_GPMI (MXS_PAD_1V8 | MXS_PAD_4MA | MXS_PAD_NOPULL) +#define MUX_CONFIG_ENET (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_PULLUP) +#define MUX_CONFIG_EMI (MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_NOPULL) + +const iomux_cfg_t iomux_setup[] = { + /* LED */ + MX28_PAD_ENET0_RXD3__GPIO_4_10 | MUX_CONFIG_LED, + + /* framebuffer */ + MX28_PAD_LCD_D00__LCD_D0 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D01__LCD_D1 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D02__LCD_D2 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D03__LCD_D3 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D04__LCD_D4 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D05__LCD_D5 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D06__LCD_D6 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D07__LCD_D7 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D08__LCD_D8 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D09__LCD_D9 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D10__LCD_D10 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D11__LCD_D11 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D12__LCD_D12 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D13__LCD_D13 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D14__LCD_D14 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D15__LCD_D15 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D16__LCD_D16 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D17__LCD_D17 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D18__LCD_D18 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D19__LCD_D19 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D20__LCD_D20 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D21__LCD_D21 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D22__LCD_D22 | MUX_CONFIG_LCD, + MX28_PAD_LCD_D23__LCD_D23 | MUX_CONFIG_LCD, + MX28_PAD_LCD_RD_E__LCD_VSYNC | MUX_CONFIG_LCD, + MX28_PAD_LCD_WR_RWN__LCD_HSYNC | MUX_CONFIG_LCD, + MX28_PAD_LCD_RS__LCD_DOTCLK | MUX_CONFIG_LCD, + MX28_PAD_LCD_CS__LCD_CS | MUX_CONFIG_LCD, + MX28_PAD_LCD_VSYNC__LCD_VSYNC | MUX_CONFIG_LCD, + MX28_PAD_LCD_HSYNC__LCD_HSYNC | MUX_CONFIG_LCD, + MX28_PAD_LCD_DOTCLK__LCD_DOTCLK | MUX_CONFIG_LCD, + MX28_PAD_LCD_ENABLE__GPIO_1_31 | MUX_CONFIG_LCD, + MX28_PAD_LCD_RESET__GPIO_3_30 | MUX_CONFIG_LCD, + + /* UART1 */ + MX28_PAD_PWM0__DUART_RX, + MX28_PAD_PWM1__DUART_TX, + MX28_PAD_AUART0_TX__DUART_RTS, + MX28_PAD_AUART0_RX__DUART_CTS, + + /* UART2 */ + MX28_PAD_AUART1_RX__AUART1_RX, + MX28_PAD_AUART1_TX__AUART1_TX, + MX28_PAD_AUART1_RTS__AUART1_RTS, + MX28_PAD_AUART1_CTS__AUART1_CTS, + + /* CAN */ + MX28_PAD_GPMI_RDY2__CAN0_TX, + MX28_PAD_GPMI_RDY3__CAN0_RX, + + /* I2C */ + MX28_PAD_I2C0_SCL__I2C0_SCL, + MX28_PAD_I2C0_SDA__I2C0_SDA, + + /* TSC2007 */ + MX28_PAD_SAIF0_MCLK__GPIO_3_20 | MUX_CONFIG_TSC, + + /* MMC0 */ + MX28_PAD_SSP0_DATA0__SSP0_D0 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA1__SSP0_D1 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA2__SSP0_D2 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA3__SSP0_D3 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA4__SSP0_D4 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA5__SSP0_D5 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA6__SSP0_D6 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DATA7__SSP0_D7 | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_CMD__SSP0_CMD | MUX_CONFIG_SSP0, + MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT | + (MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_NOPULL), + MX28_PAD_SSP0_SCK__SSP0_SCK | + (MXS_PAD_3V3 | MXS_PAD_12MA | MXS_PAD_NOPULL), + MX28_PAD_PWM3__GPIO_3_28 | MUX_CONFIG_SSP0, /* Power .. FIXME */ + MX28_PAD_AUART2_CTS__GPIO_3_10, /* WP ... FIXME */ + + /* GPMI NAND */ + MX28_PAD_GPMI_D00__GPMI_D0 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D01__GPMI_D1 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D02__GPMI_D2 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D03__GPMI_D3 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D04__GPMI_D4 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D05__GPMI_D5 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D06__GPMI_D6 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_D07__GPMI_D7 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_CE0N__GPMI_CE0N | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_RDY0__GPMI_READY0 | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_RDN__GPMI_RDN | + (MXS_PAD_1V8 | MXS_PAD_8MA | MXS_PAD_PULLUP), + MX28_PAD_GPMI_WRN__GPMI_WRN | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_ALE__GPMI_ALE | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_CLE__GPMI_CLE | MUX_CONFIG_GPMI, + MX28_PAD_GPMI_RESETN__GPMI_RESETN | MUX_CONFIG_GPMI, + + /* FEC Ethernet */ + MX28_PAD_ENET0_MDC__ENET0_MDC | MUX_CONFIG_ENET, + MX28_PAD_ENET0_MDIO__ENET0_MDIO | MUX_CONFIG_ENET, + MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | MUX_CONFIG_ENET, + MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | MUX_CONFIG_ENET, + MX28_PAD_ENET0_RXD0__ENET0_RXD0 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_RXD1__ENET0_RXD1 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_TXD0__ENET0_TXD0 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_TXD1__ENET0_TXD1 | MUX_CONFIG_ENET, + MX28_PAD_ENET_CLK__CLKCTRL_ENET | MUX_CONFIG_ENET, + + MX28_PAD_ENET0_COL__ENET1_TX_EN | MUX_CONFIG_ENET, + MX28_PAD_ENET0_CRS__ENET1_RX_EN | MUX_CONFIG_ENET, + MX28_PAD_ENET0_RXD2__ENET1_RXD0 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_RXD3__ENET1_RXD1 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_TXD2__ENET1_TXD0 | MUX_CONFIG_ENET, + MX28_PAD_ENET0_TXD3__ENET1_TXD1 | MUX_CONFIG_ENET, + + /* I2C */ + MX28_PAD_I2C0_SCL__I2C0_SCL, + MX28_PAD_I2C0_SDA__I2C0_SDA, + + /* EMI */ + MX28_PAD_EMI_D00__EMI_DATA0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D01__EMI_DATA1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D02__EMI_DATA2 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D03__EMI_DATA3 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D04__EMI_DATA4 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D05__EMI_DATA5 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D06__EMI_DATA6 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D07__EMI_DATA7 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D08__EMI_DATA8 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D09__EMI_DATA9 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D10__EMI_DATA10 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D11__EMI_DATA11 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D12__EMI_DATA12 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D13__EMI_DATA13 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D14__EMI_DATA14 | MUX_CONFIG_EMI, + MX28_PAD_EMI_D15__EMI_DATA15 | MUX_CONFIG_EMI, + MX28_PAD_EMI_ODT0__EMI_ODT0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_DQM0__EMI_DQM0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_ODT1__EMI_ODT1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_DQM1__EMI_DQM1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_DDR_OPEN_FB__EMI_DDR_OPEN_FEEDBACK | MUX_CONFIG_EMI, + MX28_PAD_EMI_CLK__EMI_CLK | MUX_CONFIG_EMI, + MX28_PAD_EMI_DQS0__EMI_DQS0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_DQS1__EMI_DQS1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_DDR_OPEN__EMI_DDR_OPEN | MUX_CONFIG_EMI, + + MX28_PAD_EMI_A00__EMI_ADDR0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A01__EMI_ADDR1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A02__EMI_ADDR2 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A03__EMI_ADDR3 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A04__EMI_ADDR4 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A05__EMI_ADDR5 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A06__EMI_ADDR6 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A07__EMI_ADDR7 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A08__EMI_ADDR8 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A09__EMI_ADDR9 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A10__EMI_ADDR10 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A11__EMI_ADDR11 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A12__EMI_ADDR12 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A13__EMI_ADDR13 | MUX_CONFIG_EMI, + MX28_PAD_EMI_A14__EMI_ADDR14 | MUX_CONFIG_EMI, + MX28_PAD_EMI_BA0__EMI_BA0 | MUX_CONFIG_EMI, + MX28_PAD_EMI_BA1__EMI_BA1 | MUX_CONFIG_EMI, + MX28_PAD_EMI_BA2__EMI_BA2 | MUX_CONFIG_EMI, + MX28_PAD_EMI_CASN__EMI_CASN | MUX_CONFIG_EMI, + MX28_PAD_EMI_RASN__EMI_RASN | MUX_CONFIG_EMI, + MX28_PAD_EMI_WEN__EMI_WEN | MUX_CONFIG_EMI, + MX28_PAD_EMI_CE0N__EMI_CE0N | MUX_CONFIG_EMI, + MX28_PAD_EMI_CE1N__EMI_CE1N | MUX_CONFIG_EMI, + MX28_PAD_EMI_CKE__EMI_CKE | MUX_CONFIG_EMI, + + /* SPI2 (for flash) */ + MX28_PAD_SSP2_SCK__SSP2_SCK | MUX_CONFIG_SSP2, + MX28_PAD_SSP2_MOSI__SSP2_CMD | MUX_CONFIG_SSP2, + MX28_PAD_SSP2_MISO__SSP2_D0 | MUX_CONFIG_SSP2, + MX28_PAD_SSP2_SS0__SSP2_D3 | + (MXS_PAD_3V3 | MXS_PAD_8MA | MXS_PAD_PULLUP), +}; + +void board_init_ll(void) +{ + mxs_iomux_setup_multiple_pads(iomux_setup, ARRAY_SIZE(iomux_setup)); + mx28_power_init(); + mx28_mem_init(); + mx28_power_wait_pswitch(); +} + +/* Support aparatus */ +inline void board_init_f(unsigned long bootflag) +{ + for (;;) + ; +} + +inline void board_init_r(gd_t *id, ulong dest_addr) +{ + for (;;) + ; +} + +inline int printf(const char *fmt, ...) +{ + return 0; +} + +inline void __coloured_LED_init(void) {} +inline void __red_LED_on(void) {} +void coloured_LED_init(void) + __attribute__((weak, alias("__coloured_LED_init"))); +void red_LED_on(void) + __attribute__((weak, alias("__red_LED_on"))); +void hang(void) __attribute__ ((noreturn)); +void hang(void) +{ + for (;;) + ; +} diff --git a/board/denx/m28evk/power_init.c b/board/denx/m28evk/power_init.c new file mode 100644 index 0000000..27322b4 --- /dev/null +++ b/board/denx/m28evk/power_init.c @@ -0,0 +1,913 @@ +/* + * Freescale i.MX28 Boot PMIC init + * + * Copyright (C) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * 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 <config.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> + +#include "m28_init.h" + +void mx28_power_clock2xtal(void) +{ + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + /* Set XTAL as CPU reference clock */ + writel(CLKCTRL_CLKSEQ_BYPASS_CPU, + &clkctrl_regs->hw_clkctrl_clkseq_set); +} + +void mx28_power_clock2pll(void) +{ + struct mx28_clkctrl_regs *clkctrl_regs = + (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; + + writel(CLKCTRL_PLL0CTRL0_POWER, + &clkctrl_regs->hw_clkctrl_pll0ctrl0_set); + early_delay(100); + writel(CLKCTRL_CLKSEQ_BYPASS_CPU, + &clkctrl_regs->hw_clkctrl_clkseq_clr); +} + +void mx28_power_clear_auto_restart(void) +{ + struct mx28_rtc_regs *rtc_regs = + (struct mx28_rtc_regs *)MXS_RTC_BASE; + + writel(RTC_CTRL_SFTRST, &rtc_regs->hw_rtc_ctrl_clr); + while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_SFTRST) + ; + + writel(RTC_CTRL_CLKGATE, &rtc_regs->hw_rtc_ctrl_clr); + while (readl(&rtc_regs->hw_rtc_ctrl) & RTC_CTRL_CLKGATE) + ; + + /* + * Due to the hardware design bug of mx28 EVK-A + * we need to set the AUTO_RESTART bit. + */ + if (readl(&rtc_regs->hw_rtc_persistent0) & RTC_PERSISTENT0_AUTO_RESTART) + return; + + while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_NEW_REGS_MASK) + ; + + setbits_le32(&rtc_regs->hw_rtc_persistent0, + RTC_PERSISTENT0_AUTO_RESTART); + writel(RTC_CTRL_FORCE_UPDATE, &rtc_regs->hw_rtc_ctrl_set); + writel(RTC_CTRL_FORCE_UPDATE, &rtc_regs->hw_rtc_ctrl_clr); + while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_NEW_REGS_MASK) + ; + while (readl(&rtc_regs->hw_rtc_stat) & RTC_STAT_STALE_REGS_MASK) + ; +} + +void mx28_power_set_linreg(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* Set linear regulator 25mV below switching converter */ + clrsetbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_LINREG_OFFSET_MASK, + POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW); + + clrsetbits_le32(&power_regs->hw_power_vddactrl, + POWER_VDDACTRL_LINREG_OFFSET_MASK, + POWER_VDDACTRL_LINREG_OFFSET_1STEPS_BELOW); + + clrsetbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_LINREG_OFFSET_MASK, + POWER_VDDIOCTRL_LINREG_OFFSET_1STEPS_BELOW); +} + +void mx28_power_setup_5v_detect(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* Start 5V detection */ + clrsetbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_VBUSVALID_TRSH_MASK, + POWER_5VCTRL_VBUSVALID_TRSH_4V4 | + POWER_5VCTRL_PWRUP_VBUS_CMPS); +} + +void mx28_src_power_init(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* Improve efficieny and reduce transient ripple */ + writel(POWER_LOOPCTRL_TOGGLE_DIF | POWER_LOOPCTRL_EN_CM_HYST | + POWER_LOOPCTRL_EN_DF_HYST, &power_regs->hw_power_loopctrl_set); + + clrsetbits_le32(&power_regs->hw_power_dclimits, + POWER_DCLIMITS_POSLIMIT_BUCK_MASK, + 0x30 << POWER_DCLIMITS_POSLIMIT_BUCK_OFFSET); + + setbits_le32(&power_regs->hw_power_battmonitor, + POWER_BATTMONITOR_EN_BATADJ); + + /* Increase the RCSCALE level for quick DCDC response to dynamic load */ + clrsetbits_le32(&power_regs->hw_power_loopctrl, + POWER_LOOPCTRL_EN_RCSCALE_MASK, + POWER_LOOPCTRL_RCSCALE_THRESH | + POWER_LOOPCTRL_EN_RCSCALE_8X); + + clrsetbits_le32(&power_regs->hw_power_minpwr, + POWER_MINPWR_HALFFETS, POWER_MINPWR_DOUBLE_FETS); + + /* 5V to battery handoff ... FIXME */ + setbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER); + early_delay(30); + clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_DCDC_XFER); +} + +void mx28_power_init_4p2_params(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* Setup 4P2 parameters */ + clrsetbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_CMPTRIP_MASK | POWER_DCDC4P2_TRG_MASK, + POWER_DCDC4P2_TRG_4V2 | (31 << POWER_DCDC4P2_CMPTRIP_OFFSET)); + + clrsetbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_HEADROOM_ADJ_MASK, + 0x4 << POWER_5VCTRL_HEADROOM_ADJ_OFFSET); + + clrsetbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_DROPOUT_CTRL_MASK, + POWER_DCDC4P2_DROPOUT_CTRL_100MV | + POWER_DCDC4P2_DROPOUT_CTRL_SRC_SEL); + + clrsetbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK, + 0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET); +} + +void mx28_enable_4p2_dcdc_input(int xfer) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t tmp, vbus_thresh, vbus_5vdetect, pwd_bo; + uint32_t prev_5v_brnout, prev_5v_droop; + + prev_5v_brnout = readl(&power_regs->hw_power_5vctrl) & + POWER_5VCTRL_PWDN_5VBRNOUT; + prev_5v_droop = readl(&power_regs->hw_power_ctrl) & + POWER_CTRL_ENIRQ_VDD5V_DROOP; + + clrbits_le32(&power_regs->hw_power_5vctrl, POWER_5VCTRL_PWDN_5VBRNOUT); + writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF, + &power_regs->hw_power_reset); + + clrbits_le32(&power_regs->hw_power_ctrl, POWER_CTRL_ENIRQ_VDD5V_DROOP); + + if (xfer && (readl(&power_regs->hw_power_5vctrl) & + POWER_5VCTRL_ENABLE_DCDC)) { + return; + } + + /* + * Recording orignal values that will be modified temporarlily + * to handle a chip bug. See chip errata for CQ ENGR00115837 + */ + tmp = readl(&power_regs->hw_power_5vctrl); + vbus_thresh = tmp & POWER_5VCTRL_VBUSVALID_TRSH_MASK; + vbus_5vdetect = tmp & POWER_5VCTRL_VBUSVALID_5VDETECT; + + pwd_bo = readl(&power_regs->hw_power_minpwr) & POWER_MINPWR_PWD_BO; + + /* + * Disable mechanisms that get erroneously tripped by when setting + * the DCDC4P2 EN_DCDC + */ + clrbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_VBUSVALID_5VDETECT | + POWER_5VCTRL_VBUSVALID_TRSH_MASK); + + writel(POWER_MINPWR_PWD_BO, &power_regs->hw_power_minpwr_set); + + if (xfer) { + setbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_DCDC_XFER); + early_delay(20); + clrbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_DCDC_XFER); + + setbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_ENABLE_DCDC); + } else { + setbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_ENABLE_DCDC); + } + + early_delay(25); + + clrsetbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_VBUSVALID_TRSH_MASK, vbus_thresh); + + if (vbus_5vdetect) + writel(vbus_5vdetect, &power_regs->hw_power_5vctrl_set); + + if (!pwd_bo) + clrbits_le32(&power_regs->hw_power_minpwr, POWER_MINPWR_PWD_BO); + + while (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) + clrbits_le32(&power_regs->hw_power_ctrl, + POWER_CTRL_VBUS_VALID_IRQ); + + if (prev_5v_brnout) { + writel(POWER_5VCTRL_PWDN_5VBRNOUT, + &power_regs->hw_power_5vctrl_set); + writel(POWER_RESET_UNLOCK_KEY, + &power_regs->hw_power_reset); + } else { + writel(POWER_5VCTRL_PWDN_5VBRNOUT, + &power_regs->hw_power_5vctrl_clr); + writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF, + &power_regs->hw_power_reset); + } + + while (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VDD5V_DROOP_IRQ) + clrbits_le32(&power_regs->hw_power_ctrl, + POWER_CTRL_VDD5V_DROOP_IRQ); + + if (prev_5v_droop) + clrbits_le32(&power_regs->hw_power_ctrl, + POWER_CTRL_ENIRQ_VDD5V_DROOP); + else + setbits_le32(&power_regs->hw_power_ctrl, + POWER_CTRL_ENIRQ_VDD5V_DROOP); +} + +void mx28_power_init_4p2_regulator(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t tmp, tmp2; + + setbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_ENABLE_4P2); + + writel(POWER_CHARGE_ENABLE_LOAD, &power_regs->hw_power_charge_set); + + writel(POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK, + &power_regs->hw_power_5vctrl_clr); + clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_TRG_MASK); + + /* Power up the 4p2 rail and logic/control */ + writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK, + &power_regs->hw_power_5vctrl_clr); + + /* + * Start charging up the 4p2 capacitor. We ramp of this charge + * gradually to avoid large inrush current from the 5V cable which can + * cause transients/problems + */ + mx28_enable_4p2_dcdc_input(0); + + if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) { + /* + * If we arrived here, we were unable to recover from mx23 chip + * errata 5837. 4P2 is disabled and sufficient battery power is + * not present. Exiting to not enable DCDC power during 5V + * connected state. + */ + clrbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_ENABLE_DCDC); + writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK, + &power_regs->hw_power_5vctrl_set); + hang(); + } + + /* + * Here we set the 4p2 brownout level to something very close to 4.2V. + * We then check the brownout status. If the brownout status is false, + * the voltage is already close to the target voltage of 4.2V so we + * can go ahead and set the 4P2 current limit to our max target limit. + * If the brownout status is true, we need to ramp us the current limit + * so that we don't cause large inrush current issues. We step up the + * current limit until the brownout status is false or until we've + * reached our maximum defined 4p2 current limit. + */ + clrsetbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_BO_MASK, + 22 << POWER_DCDC4P2_BO_OFFSET); /* 4.15V */ + + if (!(readl(&power_regs->hw_power_sts) & POWER_STS_DCDC_4P2_BO)) { + setbits_le32(&power_regs->hw_power_5vctrl, + 0x3f << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET); + } else { + tmp = (readl(&power_regs->hw_power_5vctrl) & + POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK) >> + POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET; + while (tmp < 0x3f) { + if (!(readl(&power_regs->hw_power_sts) & + POWER_STS_DCDC_4P2_BO)) { + tmp = readl(&power_regs->hw_power_5vctrl); + tmp |= POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK; + early_delay(100); + writel(tmp, &power_regs->hw_power_5vctrl); + break; + } else { + tmp++; + tmp2 = readl(&power_regs->hw_power_5vctrl); + tmp2 &= ~POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK; + tmp2 |= tmp << + POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET; + writel(tmp2, &power_regs->hw_power_5vctrl); + early_delay(100); + } + } + } + + clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK); + writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr); +} + +void mx28_power_init_dcdc_4p2_source(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + if (!(readl(&power_regs->hw_power_dcdc4p2) & + POWER_DCDC4P2_ENABLE_DCDC)) { + hang(); + } + + mx28_enable_4p2_dcdc_input(1); + + if (readl(&power_regs->hw_power_ctrl) & POWER_CTRL_VBUS_VALID_IRQ) { + clrbits_le32(&power_regs->hw_power_dcdc4p2, + POWER_DCDC4P2_ENABLE_DCDC); + writel(POWER_5VCTRL_ENABLE_DCDC, + &power_regs->hw_power_5vctrl_clr); + writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK, + &power_regs->hw_power_5vctrl_set); + } +} + +void mx28_power_enable_4p2(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t vdddctrl, vddactrl, vddioctrl; + uint32_t tmp; + + vdddctrl = readl(&power_regs->hw_power_vdddctrl); + vddactrl = readl(&power_regs->hw_power_vddactrl); + vddioctrl = readl(&power_regs->hw_power_vddioctrl); + + setbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG | + POWER_VDDDCTRL_PWDN_BRNOUT); + + setbits_le32(&power_regs->hw_power_vddactrl, + POWER_VDDACTRL_DISABLE_FET | POWER_VDDACTRL_ENABLE_LINREG | + POWER_VDDACTRL_PWDN_BRNOUT); + + setbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_DISABLE_FET | POWER_VDDIOCTRL_PWDN_BRNOUT); + + mx28_power_init_4p2_params(); + mx28_power_init_4p2_regulator(); + + /* Shutdown battery (none present) */ + clrbits_le32(&power_regs->hw_power_dcdc4p2, POWER_DCDC4P2_BO_MASK); + writel(POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr); + writel(POWER_CTRL_ENIRQ_DCDC4P2_BO, &power_regs->hw_power_ctrl_clr); + + mx28_power_init_dcdc_4p2_source(); + + writel(vdddctrl, &power_regs->hw_power_vdddctrl); + early_delay(20); + writel(vddactrl, &power_regs->hw_power_vddactrl); + early_delay(20); + writel(vddioctrl, &power_regs->hw_power_vddioctrl); + + /* + * Check if FET is enabled on either powerout and if so, + * disable load. + */ + tmp = 0; + tmp |= !(readl(&power_regs->hw_power_vdddctrl) & + POWER_VDDDCTRL_DISABLE_FET); + tmp |= !(readl(&power_regs->hw_power_vddactrl) & + POWER_VDDACTRL_DISABLE_FET); + tmp |= !(readl(&power_regs->hw_power_vddioctrl) & + POWER_VDDIOCTRL_DISABLE_FET); + if (tmp) + writel(POWER_CHARGE_ENABLE_LOAD, + &power_regs->hw_power_charge_clr); +} + +void mx28_boot_valid_5v(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* + * Use VBUSVALID level instead of VDD5V_GT_VDDIO level to trigger a 5V + * disconnect event. FIXME + */ + writel(POWER_5VCTRL_VBUSVALID_5VDETECT, + &power_regs->hw_power_5vctrl_set); + + /* Configure polarity to check for 5V disconnection. */ + writel(POWER_CTRL_POLARITY_VBUSVALID | + POWER_CTRL_POLARITY_VDD5V_GT_VDDIO, + &power_regs->hw_power_ctrl_clr); + + writel(POWER_CTRL_VBUS_VALID_IRQ | POWER_CTRL_VDD5V_GT_VDDIO_IRQ, + &power_regs->hw_power_ctrl_clr); + + mx28_power_enable_4p2(); +} + +void mx28_powerdown(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + writel(POWER_RESET_UNLOCK_KEY, &power_regs->hw_power_reset); + writel(POWER_RESET_UNLOCK_KEY | POWER_RESET_PWD_OFF, + &power_regs->hw_power_reset); +} + +void mx28_handle_5v_conflict(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t tmp; + + setbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_BO_OFFSET_MASK); + + for (;;) { + tmp = readl(&power_regs->hw_power_sts); + + if (tmp & POWER_STS_VDDIO_BO) { + mx28_powerdown(); + break; + } + + if (tmp & POWER_STS_VDD5V_GT_VDDIO) { + mx28_boot_valid_5v(); + break; + } else { + mx28_powerdown(); + break; + } + } +} + +int mx28_get_batt_volt(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t volt = readl(&power_regs->hw_power_battmonitor); + volt &= POWER_BATTMONITOR_BATT_VAL_MASK; + volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET; + volt *= 8; + return volt; +} + +int mx28_is_batt_ready(void) +{ + return (mx28_get_batt_volt() >= 3600); +} + +void mx28_5v_boot(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* + * NOTE: In original IMX-Bootlets, this also checks for VBUSVALID, + * but their implementation always returns 1 so we omit it here. + */ + if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) { + mx28_boot_valid_5v(); + return; + } + + early_delay(1000); + if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) { + mx28_boot_valid_5v(); + return; + } + + mx28_handle_5v_conflict(); +} + +void mx28_init_batt_bo(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + /* Brownout at 3V */ + clrsetbits_le32(&power_regs->hw_power_battmonitor, + POWER_BATTMONITOR_BRWNOUT_LVL_MASK, + 15 << POWER_BATTMONITOR_BRWNOUT_LVL_OFFSET); + + writel(POWER_CTRL_BATT_BO_IRQ, &power_regs->hw_power_ctrl_clr); + writel(POWER_CTRL_ENIRQ_BATT_BO, &power_regs->hw_power_ctrl_clr); +} + +void mx28_switch_vddd_to_dcdc_source(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + clrsetbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_LINREG_OFFSET_MASK, + POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW); + + clrbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_DISABLE_FET | POWER_VDDDCTRL_ENABLE_LINREG | + POWER_VDDDCTRL_DISABLE_STEPPING); +} + +int mx28_is_batt_good(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t volt; + + volt = readl(&power_regs->hw_power_battmonitor); + volt &= POWER_BATTMONITOR_BATT_VAL_MASK; + volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET; + volt *= 8; + + if ((volt >= 2400) && (volt <= 4300)) + return 1; + + clrsetbits_le32(&power_regs->hw_power_5vctrl, + POWER_5VCTRL_CHARGE_4P2_ILIMIT_MASK, + 0x3 << POWER_5VCTRL_CHARGE_4P2_ILIMIT_OFFSET); + writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK, + &power_regs->hw_power_5vctrl_clr); + + clrsetbits_le32(&power_regs->hw_power_charge, + POWER_CHARGE_STOP_ILIMIT_MASK | POWER_CHARGE_BATTCHRG_I_MASK, + POWER_CHARGE_STOP_ILIMIT_10MA | 0x3); + + writel(POWER_CHARGE_PWD_BATTCHRG, &power_regs->hw_power_charge_clr); + writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK, + &power_regs->hw_power_5vctrl_clr); + + early_delay(500000); + + volt = readl(&power_regs->hw_power_battmonitor); + volt &= POWER_BATTMONITOR_BATT_VAL_MASK; + volt >>= POWER_BATTMONITOR_BATT_VAL_OFFSET; + volt *= 8; + + if (volt >= 3500) + return 0; + + if (volt >= 2400) + return 1; + + writel(POWER_CHARGE_STOP_ILIMIT_MASK | POWER_CHARGE_BATTCHRG_I_MASK, + &power_regs->hw_power_charge_clr); + writel(POWER_CHARGE_PWD_BATTCHRG, &power_regs->hw_power_charge_set); + + return 0; +} + +void mx28_power_configure_power_source(void) +{ + mx28_src_power_init(); + + mx28_5v_boot(); + mx28_power_clock2pll(); + + mx28_init_batt_bo(); + mx28_switch_vddd_to_dcdc_source(); +} + +void mx28_enable_output_rail_protection(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ | + POWER_CTRL_VDDIO_BO_IRQ, &power_regs->hw_power_ctrl_clr); + + setbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_PWDN_BRNOUT); + + setbits_le32(&power_regs->hw_power_vddactrl, + POWER_VDDACTRL_PWDN_BRNOUT); + + setbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_PWDN_BRNOUT); +} + +int mx28_get_vddio_power_source_off(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t tmp; + + if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) { + tmp = readl(&power_regs->hw_power_vddioctrl); + if (tmp & POWER_VDDIOCTRL_DISABLE_FET) { + if ((tmp & POWER_VDDIOCTRL_LINREG_OFFSET_MASK) == + POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) { + return 1; + } + } + + if (!(readl(&power_regs->hw_power_5vctrl) & + POWER_5VCTRL_ENABLE_DCDC)) { + if ((tmp & POWER_VDDIOCTRL_LINREG_OFFSET_MASK) == + POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) { + return 1; + } + } + } + + return 0; + +} + +int mx28_get_vddd_power_source_off(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t tmp; + + tmp = readl(&power_regs->hw_power_vdddctrl); + if (tmp & POWER_VDDDCTRL_DISABLE_FET) { + if ((tmp & POWER_VDDDCTRL_LINREG_OFFSET_MASK) == + POWER_VDDDCTRL_LINREG_OFFSET_0STEPS) { + return 1; + } + } + + if (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO) { + if (!(readl(&power_regs->hw_power_5vctrl) & + POWER_5VCTRL_ENABLE_DCDC)) { + return 1; + } + } + + if (!(tmp & POWER_VDDDCTRL_ENABLE_LINREG)) { + if ((tmp & POWER_VDDDCTRL_LINREG_OFFSET_MASK) == + POWER_VDDDCTRL_LINREG_OFFSET_1STEPS_BELOW) { + return 1; + } + } + + return 0; +} + +void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t cur_target, diff, bo_int = 0; + uint32_t powered_by_linreg = 0; + + new_brownout = new_target - new_brownout; + + cur_target = readl(&power_regs->hw_power_vddioctrl); + cur_target &= POWER_VDDIOCTRL_TRG_MASK; + cur_target *= 50; /* 50 mV step*/ + cur_target += 2800; /* 2800 mV lowest */ + + powered_by_linreg = mx28_get_vddio_power_source_off(); + if (new_target > cur_target) { + + if (powered_by_linreg) { + bo_int = readl(&power_regs->hw_power_vddioctrl); + clrbits_le32(&power_regs->hw_power_vddioctrl, + POWER_CTRL_ENIRQ_VDDIO_BO); + } + + setbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_BO_OFFSET_MASK); + do { + if (new_target - cur_target > 100) + diff = cur_target + 100; + else + diff = new_target; + + diff -= 2800; + diff /= 50; + + clrsetbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_TRG_MASK, diff); + + if (powered_by_linreg) + early_delay(1500); + else { + while (!(readl(&power_regs->hw_power_sts) & + POWER_STS_DC_OK)) + ; + + } + + cur_target = readl(&power_regs->hw_power_vddioctrl); + cur_target &= POWER_VDDIOCTRL_TRG_MASK; + cur_target *= 50; /* 50 mV step*/ + cur_target += 2800; /* 2800 mV lowest */ + } while (new_target > cur_target); + + if (powered_by_linreg) { + writel(POWER_CTRL_VDDIO_BO_IRQ, + &power_regs->hw_power_ctrl_clr); + if (bo_int & POWER_CTRL_ENIRQ_VDDIO_BO) + setbits_le32(&power_regs->hw_power_vddioctrl, + POWER_CTRL_ENIRQ_VDDIO_BO); + } + } else { + do { + if (cur_target - new_target > 100) + diff = cur_target - 100; + else + diff = new_target; + + diff -= 2800; + diff /= 50; + + clrsetbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDIOCTRL_TRG_MASK, diff); + + if (powered_by_linreg) + early_delay(1500); + else { + while (!(readl(&power_regs->hw_power_sts) & + POWER_STS_DC_OK)) + ; + + } + + cur_target = readl(&power_regs->hw_power_vddioctrl); + cur_target &= POWER_VDDIOCTRL_TRG_MASK; + cur_target *= 50; /* 50 mV step*/ + cur_target += 2800; /* 2800 mV lowest */ + } while (new_target < cur_target); + } + + clrsetbits_le32(&power_regs->hw_power_vddioctrl, + POWER_VDDDCTRL_BO_OFFSET_MASK, + new_brownout << POWER_VDDDCTRL_BO_OFFSET_OFFSET); +} + +void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + uint32_t cur_target, diff, bo_int = 0; + uint32_t powered_by_linreg = 0; + + new_brownout = new_target - new_brownout; + + cur_target = readl(&power_regs->hw_power_vdddctrl); + cur_target &= POWER_VDDDCTRL_TRG_MASK; + cur_target *= 25; /* 25 mV step*/ + cur_target += 800; /* 800 mV lowest */ + + powered_by_linreg = mx28_get_vddd_power_source_off(); + if (new_target > cur_target) { + if (powered_by_linreg) { + bo_int = readl(&power_regs->hw_power_vdddctrl); + clrbits_le32(&power_regs->hw_power_vdddctrl, + POWER_CTRL_ENIRQ_VDDD_BO); + } + + setbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_BO_OFFSET_MASK); + + do { + if (new_target - cur_target > 100) + diff = cur_target + 100; + else + diff = new_target; + + diff -= 800; + diff /= 25; + + clrsetbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_TRG_MASK, diff); + + if (powered_by_linreg) + early_delay(1500); + else { + while (!(readl(&power_regs->hw_power_sts) & + POWER_STS_DC_OK)) + ; + + } + + cur_target = readl(&power_regs->hw_power_vdddctrl); + cur_target &= POWER_VDDDCTRL_TRG_MASK; + cur_target *= 25; /* 25 mV step*/ + cur_target += 800; /* 800 mV lowest */ + } while (new_target > cur_target); + + if (powered_by_linreg) { + writel(POWER_CTRL_VDDD_BO_IRQ, + &power_regs->hw_power_ctrl_clr); + if (bo_int & POWER_CTRL_ENIRQ_VDDD_BO) + setbits_le32(&power_regs->hw_power_vdddctrl, + POWER_CTRL_ENIRQ_VDDD_BO); + } + } else { + do { + if (cur_target - new_target > 100) + diff = cur_target - 100; + else + diff = new_target; + + diff -= 800; + diff /= 25; + + clrsetbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_TRG_MASK, diff); + + if (powered_by_linreg) + early_delay(1500); + else { + while (!(readl(&power_regs->hw_power_sts) & + POWER_STS_DC_OK)) + ; + + } + + cur_target = readl(&power_regs->hw_power_vdddctrl); + cur_target &= POWER_VDDDCTRL_TRG_MASK; + cur_target *= 25; /* 25 mV step*/ + cur_target += 800; /* 800 mV lowest */ + } while (new_target < cur_target); + } + + clrsetbits_le32(&power_regs->hw_power_vdddctrl, + POWER_VDDDCTRL_BO_OFFSET_MASK, + new_brownout << POWER_VDDDCTRL_BO_OFFSET_OFFSET); +} + +void mx28_power_init(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + mx28_power_clock2xtal(); + mx28_power_clear_auto_restart(); + mx28_power_set_linreg(); + mx28_power_setup_5v_detect(); + mx28_power_configure_power_source(); + mx28_enable_output_rail_protection(); + + mx28_power_set_vddio(3300, 3150); + + mx28_power_set_vddd(1350, 1200); + + writel(POWER_CTRL_VDDD_BO_IRQ | POWER_CTRL_VDDA_BO_IRQ | + POWER_CTRL_VDDIO_BO_IRQ | POWER_CTRL_VDD5V_DROOP_IRQ | + POWER_CTRL_VBUS_VALID_IRQ | POWER_CTRL_BATT_BO_IRQ | + POWER_CTRL_DCDC4P2_BO_IRQ, &power_regs->hw_power_ctrl_clr); + + writel(POWER_5VCTRL_PWDN_5VBRNOUT, &power_regs->hw_power_5vctrl_set); + + early_delay(1000); +} + +#ifdef CONFIG_SPL_MX28_PSWITCH_WAIT +void mx28_power_wait_pswitch(void) +{ + struct mx28_power_regs *power_regs = + (struct mx28_power_regs *)MXS_POWER_BASE; + + while (!(readl(&power_regs->hw_power_sts) & POWER_STS_PSWITCH_MASK)) + ; +} +#endif diff --git a/board/denx/m28evk/start.S b/board/denx/m28evk/start.S new file mode 100644 index 0000000..cf67599 --- /dev/null +++ b/board/denx/m28evk/start.S @@ -0,0 +1,396 @@ +/* + * armboot - Startup Code for ARM926EJS CPU-core + * + * Copyright (c) 2003 Texas Instruments + * + * ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------ + * + * Copyright (c) 2001 Marius Groger mag@sysgo.de + * Copyright (c) 2002 Alex Zupke azu@sysgo.de + * Copyright (c) 2002 Gary Jennejohn garyj@denx.de + * Copyright (c) 2003 Richard Woodruff r-woodruff2@ti.com + * Copyright (c) 2003 Kshitij kshitij@ti.com + * Copyright (c) 2010 Albert Aribaud albert.u.boot@aribaud.net + * + * Change to support call back into iMX28 bootrom + * Copyright (c) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * 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 <asm-offsets.h> +#include <config.h> +#include <common.h> +#include <version.h> + +#if defined(CONFIG_OMAP1610) +#include <./configs/omap1510.h> +#elif defined(CONFIG_OMAP730) +#include <./configs/omap730.h> +#endif + +/* + ************************************************************************* + * + * Jump vector table as in table 3.1 in [1] + * + ************************************************************************* + */ + + +.globl _start +_start: + b reset +#ifdef CONFIG_SPL_BUILD +/* No exception handlers in preloader */ + ldr pc, _hang + ldr pc, _hang + ldr pc, _hang + ldr pc, _hang + b reset + ldr pc, _hang + ldr pc, _hang + +_hang: + .word do_hang +/* pad to 64 byte boundary */ + .word 0x12345678 + .word 0x12345678 + .word 0x12345678 + .word 0x12345678 + .word 0x12345678 + .word 0x12345678 + .word 0x12345678 +#else + ldr pc, _undefined_instruction + ldr pc, _software_interrupt + ldr pc, _prefetch_abort + ldr pc, _data_abort + ldr pc, _not_used + ldr pc, _irq + ldr pc, _fiq + +_undefined_instruction: + .word undefined_instruction +_software_interrupt: + .word software_interrupt +_prefetch_abort: + .word prefetch_abort +_data_abort: + .word data_abort +_not_used: + .word not_used +_irq: + .word irq +_fiq: + .word fiq + +#endif /* CONFIG_SPL_BUILD */ + .balignl 16,0xdeadbeef + + +/* + ************************************************************************* + * + * Startup Code (reset vector) + * + * do important init only if we don't start from memory! + * setup Memory and board specific bits prior to relocation. + * relocate armboot to ram + * setup stack + * + ************************************************************************* + */ + +.globl _TEXT_BASE +_TEXT_BASE: + .word CONFIG_SYS_TEXT_BASE + +/* + * These are defined in the board-specific linker script. + * Subtracting _start from them lets the linker put their + * relative position in the executable instead of leaving + * them null. + */ +.globl _bss_start_ofs +_bss_start_ofs: + .word __bss_start - _start + +.globl _bss_end_ofs +_bss_end_ofs: + .word __bss_end__ - _start + +.globl _end_ofs +_end_ofs: + .word _end - _start + +#ifdef CONFIG_USE_IRQ +/* IRQ stack memory (calculated at run-time) */ +.globl IRQ_STACK_START +IRQ_STACK_START: + .word 0x0badc0de + +/* IRQ stack memory (calculated at run-time) */ +.globl FIQ_STACK_START +FIQ_STACK_START: + .word 0x0badc0de +#endif + +/* IRQ stack memory (calculated at run-time) + 8 bytes */ +.globl IRQ_STACK_START_IN +IRQ_STACK_START_IN: + .word 0x0badc0de + +/* + * the actual reset code + */ + +reset: + /* + * Store all registers on old stack pointer, this will allow us later to + * return to the BootROM and let the BootROM load U-Boot into RAM. + */ + push {r0-r12,r14} + + /* + * set the cpu to SVC32 mode + */ + mrs r0,cpsr + bic r0,r0,#0x1f + orr r0,r0,#0xd3 + msr cpsr,r0 + + /* + * we do sys-critical inits only at reboot, + * not when booting from ram! + */ +#ifndef CONFIG_SKIP_LOWLEVEL_INIT + bl cpu_init_crit +#endif + + bl board_init_ll + + pop {r0-r12,r14} + bx lr + +/* + ************************************************************************* + * + * CPU_init_critical registers + * + * setup important registers + * setup memory timing + * + ************************************************************************* + */ +#ifndef CONFIG_SKIP_LOWLEVEL_INIT +cpu_init_crit: + /* + * flush v4 I/D caches + */ + mov r0, #0 + mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */ + mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */ + + /* + * disable MMU stuff and caches + */ + mrc p15, 0, r0, c1, c0, 0 + bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */ + bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */ + orr r0, r0, #0x00000002 /* set bit 2 (A) Align */ + orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */ + mcr p15, 0, r0, c1, c0, 0 + + mov pc, lr /* back to my caller */ +#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ + +#ifndef CONFIG_SPL_BUILD +/* + ************************************************************************* + * + * Interrupt handling + * + ************************************************************************* + */ + +@ +@ IRQ stack frame. +@ +#define S_FRAME_SIZE 72 + +#define S_OLD_R0 68 +#define S_PSR 64 +#define S_PC 60 +#define S_LR 56 +#define S_SP 52 + +#define S_IP 48 +#define S_FP 44 +#define S_R10 40 +#define S_R9 36 +#define S_R8 32 +#define S_R7 28 +#define S_R6 24 +#define S_R5 20 +#define S_R4 16 +#define S_R3 12 +#define S_R2 8 +#define S_R1 4 +#define S_R0 0 + +#define MODE_SVC 0x13 +#define I_BIT 0x80 + +/* + * use bad_save_user_regs for abort/prefetch/undef/swi ... + * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling + */ + + .macro bad_save_user_regs + @ carve out a frame on current user stack + sub sp, sp, #S_FRAME_SIZE + stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12 + ldr r2, IRQ_STACK_START_IN + @ get values for "aborted" pc and cpsr (into parm regs) + ldmia r2, {r2 - r3} + add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack + add r5, sp, #S_SP + mov r1, lr + stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr + mov r0, sp @ save current stack into r0 (param register) + .endm + + .macro irq_save_user_regs + sub sp, sp, #S_FRAME_SIZE + stmia sp, {r0 - r12} @ Calling r0-r12 + @ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good. + add r8, sp, #S_PC + stmdb r8, {sp, lr}^ @ Calling SP, LR + str lr, [r8, #0] @ Save calling PC + mrs r6, spsr + str r6, [r8, #4] @ Save CPSR + str r0, [r8, #8] @ Save OLD_R0 + mov r0, sp + .endm + + .macro irq_restore_user_regs + ldmia sp, {r0 - lr}^ @ Calling r0 - lr + mov r0, r0 + ldr lr, [sp, #S_PC] @ Get PC + add sp, sp, #S_FRAME_SIZE + subs pc, lr, #4 @ return & move spsr_svc into cpsr + .endm + + .macro get_bad_stack + ldr r13, IRQ_STACK_START_IN @ setup our mode stack + + str lr, [r13] @ save caller lr in position 0 of saved stack + mrs lr, spsr @ get the spsr + str lr, [r13, #4] @ save spsr in position 1 of saved stack + mov r13, #MODE_SVC @ prepare SVC-Mode + @ msr spsr_c, r13 + msr spsr, r13 @ switch modes, make sure moves will execute + mov lr, pc @ capture return pc + movs pc, lr @ jump to next instruction & switch modes. + .endm + + .macro get_irq_stack @ setup IRQ stack + ldr sp, IRQ_STACK_START + .endm + + .macro get_fiq_stack @ setup FIQ stack + ldr sp, FIQ_STACK_START + .endm +#endif /* CONFIG_SPL_BUILD */ + +/* + * exception handlers + */ +#ifdef CONFIG_SPL_BUILD + .align 5 +do_hang: + ldr sp, _TEXT_BASE /* switch to abort stack */ +1: + bl 1b /* hang and never return */ +#else /* !CONFIG_SPL_BUILD */ + .align 5 +undefined_instruction: + get_bad_stack + bad_save_user_regs + bl do_undefined_instruction + + .align 5 +software_interrupt: + get_bad_stack + bad_save_user_regs + bl do_software_interrupt + + .align 5 +prefetch_abort: + get_bad_stack + bad_save_user_regs + bl do_prefetch_abort + + .align 5 +data_abort: + get_bad_stack + bad_save_user_regs + bl do_data_abort + + .align 5 +not_used: + get_bad_stack + bad_save_user_regs + bl do_not_used + +#ifdef CONFIG_USE_IRQ + + .align 5 +irq: + get_irq_stack + irq_save_user_regs + bl do_irq + irq_restore_user_regs + + .align 5 +fiq: + get_fiq_stack + /* someone ought to write a more effiction fiq_save_user_regs */ + irq_save_user_regs + bl do_fiq + irq_restore_user_regs + +#else + + .align 5 +irq: + get_bad_stack + bad_save_user_regs + bl do_irq + + .align 5 +fiq: + get_bad_stack + bad_save_user_regs + bl do_fiq + +#endif +#endif /* CONFIG_SPL_BUILD */ diff --git a/board/denx/m28evk/u-boot-spl.lds b/board/denx/m28evk/u-boot-spl.lds new file mode 100644 index 0000000..e296a92 --- /dev/null +++ b/board/denx/m28evk/u-boot-spl.lds @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2011 Marek Vasut marek.vasut@gmail.com + * on behalf of DENX Software Engineering GmbH + * + * January 2004 - Changed to support H4 device + * Copyright (c) 2004-2008 Texas Instruments + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, garyj@denx.de + * + * 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 + */ + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + . = 0x00000000; + + . = ALIGN(4); + .text : + { + board/denx/m28evk/start.o (.text) + *(.text) + } + + . = ALIGN(4); + .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) } + + . = ALIGN(4); + .data : { + *(.data) + } + + . = ALIGN(4); + __u_boot_cmd_start = .; + .u_boot_cmd : { *(.u_boot_cmd) } + __u_boot_cmd_end = .; + + . = ALIGN(4); + + .rel.dyn : { + __rel_dyn_start = .; + *(.rel*) + __rel_dyn_end = .; + } + + .dynsym : { + __dynsym_start = .; + *(.dynsym) + } + + _end = .; + + .bss __rel_dyn_start (OVERLAY) : { + __bss_start = .; + *(.bss) + . = ALIGN(4); + __bss_end__ = .; + } + + /DISCARD/ : { *(.bss*) } + /DISCARD/ : { *(.dynstr*) } + /DISCARD/ : { *(.dynsym*) } + /DISCARD/ : { *(.dynamic*) } + /DISCARD/ : { *(.hash*) } + /DISCARD/ : { *(.plt*) } + /DISCARD/ : { *(.interp*) } + /DISCARD/ : { *(.gnu*) } +} diff --git a/board/denx/m28evk/u-boot.bd b/board/denx/m28evk/u-boot.bd new file mode 100644 index 0000000..3ce7f92 --- /dev/null +++ b/board/denx/m28evk/u-boot.bd @@ -0,0 +1,14 @@ +sources { + u_boot_spl="spl/u-boot-spl.bin"; + u_boot="u-boot.bin"; +} + +section (0) { + load u_boot_spl > 0x0000; + load ivt (entry = 0x0014) > 0x8000; + hab call 0x8000; + + load u_boot > 0x40000100; + load ivt (entry = 0x40000100) > 0x8000; + hab call 0x8000; +} diff --git a/include/configs/m28evk.h b/include/configs/m28evk.h index d88e09e..59e3e05 100644 --- a/include/configs/m28evk.h +++ b/include/configs/m28evk.h @@ -43,6 +43,14 @@ #define CONFIG_ARCH_CPU_INIT
/* + * SPL + */ +#define CONFIG_SPL +#define CONFIG_SPL_NO_CPU_SUPPORT_CODE +#define CONFIG_SPL_START_S_PATH "board/denx/m28evk" +#define CONFIG_SPL_LDSCRIPT "board/denx/m28evk/u-boot-spl.lds" + +/* * U-Boot Commands */ #include <config_cmd_default.h>