diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/Makefile | 9 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/mx28_init.h | 41 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/spl_boot.c | 87 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c | 240 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/spl_power_init.c | 913 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/start.S | 234 | ||||
| -rw-r--r-- | arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds | 87 |
7 files changed, 1611 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/mx28/Makefile b/arch/arm/cpu/arm926ejs/mx28/Makefile index 7845310cf..372de8a5e 100644 --- a/arch/arm/cpu/arm926ejs/mx28/Makefile +++ b/arch/arm/cpu/arm926ejs/mx28/Makefile @@ -27,6 +27,10 @@ LIB = $(obj)lib$(SOC).o COBJS = clock.o mx28.o iomux.o timer.o +ifdef CONFIG_SPL_BUILD +COBJS += memsize.o spl_boot.o spl_mem_init.o spl_power_init.o +endif + SRCS := $(START:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) START := $(addprefix $(obj),$(START)) @@ -36,6 +40,11 @@ all: $(obj).depend $(LIB) $(LIB): $(OBJS) $(call cmd_link_o_target, $(OBJS)) +ifdef CONFIG_SPL_BUILD +memsize.c: + ln -sf $(TOPDIR)/common/memsize.c $@ +endif + ######################################################################### # defines $(obj).depend target diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28_init.h b/arch/arm/cpu/arm926ejs/mx28/mx28_init.h new file mode 100644 index 000000000..98d363199 --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/mx28_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/arch/arm/cpu/arm926ejs/mx28/spl_boot.c b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c new file mode 100644 index 000000000..3cd4c249a --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/spl_boot.c @@ -0,0 +1,87 @@ +/* + * 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 <asm/arch/imx-regs.h> + +#include "mx28_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)) + ; +} + +void mx28_common_spl_init(const iomux_cfg_t *iomux_setup, + const unsigned int iomux_size) +{ + mxs_iomux_setup_multiple_pads(iomux_setup, iomux_size); + 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/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c new file mode 100644 index 000000000..00493b8bf --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c @@ -0,0 +1,240 @@ +/* + * 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 "mx28_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); +} + +#define HW_DIGCTRL_SCRATCH0 0x8001c280 +#define HW_DIGCTRL_SCRATCH1 0x8001c290 +void data_abort_memdetect_handler(void) __attribute__((naked)); +void data_abort_memdetect_handler(void) +{ + asm volatile("subs pc, r14, #4"); +} + +void mx28_mem_get_size(void) +{ + uint32_t sz, da; + uint32_t *vt = (uint32_t *)0x20; + + /* Replace the DABT handler. */ + da = vt[4]; + vt[4] = (uint32_t)&data_abort_memdetect_handler; + + sz = get_ram_size((long *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE); + writel(sz, HW_DIGCTRL_SCRATCH0); + writel(sz, HW_DIGCTRL_SCRATCH1); + + /* Restore the old DABT handler. */ + vt[4] = da; +} + +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(); + + mx28_mem_get_size(); +} diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c new file mode 100644 index 000000000..a4dc2a31b --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/spl_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 "mx28_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/arch/arm/cpu/arm926ejs/mx28/start.S b/arch/arm/cpu/arm926ejs/mx28/start.S new file mode 100644 index 000000000..94696d6cd --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/start.S @@ -0,0 +1,234 @@ +/* + * 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 + b undefined_instruction + b software_interrupt + b prefetch_abort + b data_abort + b not_used + b irq + b fiq + +/* + * Vector table, located at address 0x20. + * This table allows the code running AFTER SPL, the U-Boot, to install it's + * interrupt handlers here. The problem is that the U-Boot is loaded into RAM, + * including it's interrupt vectoring table and the table at 0x0 is still the + * SPLs. So if interrupt happens in U-Boot, the SPLs interrupt vectoring table + * is still used. + */ +_vt_reset: + .word _reset +_vt_undefined_instruction: + .word _hang +_vt_software_interrupt: + .word _hang +_vt_prefetch_abort: + .word _hang +_vt_data_abort: + .word _hang +_vt_not_used: + .word _reset +_vt_irq: + .word _hang +_vt_fiq: + .word _hang + +reset: + ldr pc, _vt_reset +undefined_instruction: + ldr pc, _vt_undefined_instruction +software_interrupt: + ldr pc, _vt_software_interrupt +prefetch_abort: + ldr pc, _vt_prefetch_abort +data_abort: + ldr pc, _vt_data_abort +not_used: + ldr pc, _vt_not_used +irq: + ldr pc, _vt_irq +fiq: + ldr pc, _vt_fiq + + .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 */ + + .align 5 +#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ + +_hang: + ldr sp, _TEXT_BASE /* switch to abort stack */ +1: + bl 1b /* hang and never return */ diff --git a/arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds b/arch/arm/cpu/arm926ejs/mx28/u-boot-spl.lds new file mode 100644 index 000000000..893320f99 --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/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 : + { + arch/arm/cpu/arm926ejs/mx28/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*) } +} |