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i.MX28: Move SPL to arch/arm/cpu/arm926ejs/mx28

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This moves SPL to common location so it can be reused by multiple boards. Also,
this commit adjusts M28 SoM to avoid breakage due to the move.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Marek Vasut
2011-12-02 03:47:40 +00:00
committed by Albert ARIBAUD
parent 74cf05fc53
commit c944a3ef82
11 changed files with 113 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
board/denx/m28evk/Makefile
View File

@@ -27,10 +27,8 @@ 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 memsize.o
else
COBJS := spl_boot.o
endif
SRCS := $(COBJS:.o=.c)
@@ -41,11 +39,6 @@ $(LIB): $(obj).depend $(OBJS)
all: $(ALL)
ifdef CONFIG_SPL_BUILD
memsize.c:
ln -sf $(TOPDIR)/common/memsize.c $@
endif
#########################################################################
# defines $(obj).depend target

41
board/denx/m28evk/m28_init.h
View File

@@ -1,41 +0,0 @@
/*
* 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__ */

240
board/denx/m28evk/mem_init.c
View File

@@ -1,240 +0,0 @@
/*
* 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);
}
#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();
}

913
board/denx/m28evk/power_init.c
View File

@@ -1,913 +0,0 @@
/*
* 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

61
board/denx/m28evk/mmc_boot.c → board/denx/m28evk/spl_boot.c
View File

@@ -1,5 +1,5 @@
/*
* Freescale i.MX28 Boot setup
* DENX M28 Boot setup
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
@@ -27,23 +27,8 @@
#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))
;
}
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
#define MUX_CONFIG_LED (MXS_PAD_3V3 | MXS_PAD_4MA | MXS_PAD_NOPULL)
#define MUX_CONFIG_LCD (MXS_PAD_3V3 | MXS_PAD_4MA)
@@ -109,10 +94,6 @@ const iomux_cfg_t iomux_setup[] = {
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,
@@ -235,39 +216,5 @@ const iomux_cfg_t iomux_setup[] = {
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 (;;)
;
mx28_common_spl_init(iomux_setup, ARRAY_SIZE(iomux_setup));
}

234
board/denx/m28evk/start.S
View File

@@ -1,234 +0,0 @@
/*
* 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 */

87
board/denx/m28evk/u-boot-spl.lds
View File

@@ -1,87 +0,0 @@
/*
* 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*) }
}