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arm, davinci, am1808: add lowlevel functions for booting from NOR

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Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Heiko Schocher 2011-09-14 19:59:38 +00:00 committed by Albert ARIBAUD
parent 337c433383
commit 310ae55efe
3 changed files with 473 additions and 0 deletions
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1
arch/arm/cpu/arm926ejs/davinci/Makefile
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@ -28,6 +28,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o
COBJS-y += cpu.o timer.o psc.o
COBJS-$(CONFIG_AM18018_LOWLEVEL) += am1808_lowlevel.o
COBJS-$(CONFIG_SOC_DM355) += dm355.o
COBJS-$(CONFIG_SOC_DM365) += dm365.o
COBJS-$(CONFIG_SOC_DM644X) += dm644x.o

428
arch/arm/cpu/arm926ejs/davinci/am1808_lowlevel.c Normal file
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@ -0,0 +1,428 @@
/*
* SoC-specific lowlevel code for AM1808 and similar chips
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <common.h>
#include <nand.h>
#include <ns16550.h>
#include <post.h>
#include <asm/arch/am1808_lowlevel.h>
#include <asm/arch/hardware.h>
#include <asm/arch/ddr2_defs.h>
#include <asm/arch/emif_defs.h>
void am1808_waitloop(unsigned long loopcnt)
{
unsigned long i;
for (i = 0; i < loopcnt; i++)
asm(" NOP");
}
int am1808_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult)
{
if (reg == davinci_pllc0_regs)
/* Unlock PLL registers. */
clrbits_le32(&davinci_syscfg_regs->cfgchip0, 0x00000010);
/*
* Set PLLENSRC '0',bit 5, PLL Enable(PLLEN) selection is controlled
* through MMR
*/
clrbits_le32(&reg->pllctl, 0x00000020);
/* PLLCTL.EXTCLKSRC bit 9 should be left at 0 for Freon */
clrbits_le32(&reg->pllctl, 0x00000200);
/* Set PLLEN=0 => PLL BYPASS MODE */
clrbits_le32(&reg->pllctl, 0x00000001);
am1808_waitloop(150);
if (reg == davinci_pllc0_regs) {
/*
* Select the Clock Mode bit 8 as External Clock or On Chip
* Oscilator
*/
dv_maskbits(&reg->pllctl, 0xFFFFFEFF);
setbits_le32(&reg->pllctl, (CONFIG_SYS_DV_CLKMODE << 8));
}
/* Clear PLLRST bit to reset the PLL */
clrbits_le32(&reg->pllctl, 0x00000008);
/* Disable the PLL output */
setbits_le32(&reg->pllctl, 0x00000010);
/* PLL initialization sequence */
/*
* Power up the PLL- PWRDN bit set to 0 to bring the PLL out of
* power down bit
*/
clrbits_le32(&reg->pllctl, 0x00000002);
/* Enable the PLL from Disable Mode PLLDIS bit to 0 */
clrbits_le32(&reg->pllctl, 0x00000010);
/* Program the required multiplier value in PLLM */
writel(pllmult, &reg->pllm);
/* program the postdiv */
if (reg == davinci_pllc0_regs)
writel((0x8000 | CONFIG_SYS_AM1808_PLL0_POSTDIV),
&reg->postdiv);
else
writel((0x8000 | CONFIG_SYS_AM1808_PLL1_POSTDIV),
&reg->postdiv);
/*
* Check for the GOSTAT bit in PLLSTAT to clear to 0 to indicate that
* no GO operation is currently in progress
*/
while ((readl(&reg->pllstat) & 0x1) == 1)
;
if (reg == davinci_pllc0_regs) {
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV1, &reg->plldiv1);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV2, &reg->plldiv2);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV3, &reg->plldiv3);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV4, &reg->plldiv4);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV5, &reg->plldiv5);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV6, &reg->plldiv6);
writel(CONFIG_SYS_AM1808_PLL0_PLLDIV7, &reg->plldiv7);
} else {
writel(CONFIG_SYS_AM1808_PLL1_PLLDIV1, &reg->plldiv1);
writel(CONFIG_SYS_AM1808_PLL1_PLLDIV2, &reg->plldiv2);
writel(CONFIG_SYS_AM1808_PLL1_PLLDIV3, &reg->plldiv3);
}
/*
* Set the GOSET bit in PLLCMD to 1 to initiate a new divider
* transition.
*/
setbits_le32(&reg->pllcmd, 0x01);
/*
* Wait for the GOSTAT bit in PLLSTAT to clear to 0
* (completion of phase alignment).
*/
while ((readl(&reg->pllstat) & 0x1) == 1)
;
/* Wait for PLL to reset properly. See PLL spec for PLL reset time */
am1808_waitloop(200);
/* Set the PLLRST bit in PLLCTL to 1 to bring the PLL out of reset */
setbits_le32(&reg->pllctl, 0x00000008);
/* Wait for PLL to lock. See PLL spec for PLL lock time */
am1808_waitloop(2400);
/*
* Set the PLLEN bit in PLLCTL to 1 to remove the PLL from bypass
* mode
*/
setbits_le32(&reg->pllctl, 0x00000001);
/*
* clear EMIFA and EMIFB clock source settings, let them
* run off SYSCLK
*/
if (reg == davinci_pllc0_regs)
dv_maskbits(&davinci_syscfg_regs->cfgchip3, 0xFFFFFFF8);
return 0;
}
void am1808_lpc_transition(unsigned char pscnum, unsigned char module,
unsigned char domain, unsigned char state)
{
struct davinci_psc_regs *reg;
dv_reg_p mdstat, mdctl;
if (pscnum == 0) {
reg = davinci_psc0_regs;
mdstat = &reg->psc0.mdstat[module];
mdctl = &reg->psc0.mdctl[module];
} else {
reg = davinci_psc1_regs;
mdstat = &reg->psc1.mdstat[module];
mdctl = &reg->psc1.mdctl[module];
}
/* Wait for any outstanding transition to complete */
while ((readl(&reg->ptstat) & (0x00000001 << domain)))
;
/* If we are already in that state, just return */
if ((readl(mdstat) & 0x1F) == state)
return;
/* Perform transition */
writel((readl(mdctl) & 0xFFFFFFE0) | state, mdctl);
setbits_le32(&reg->ptcmd, (0x00000001 << domain));
/* Wait for transition to complete */
while (readl(&reg->ptstat) & (0x00000001 << domain))
;
/* Wait and verify the state */
while ((readl(mdstat) & 0x1F) != state)
;
}
int am1808_ddr_setup(unsigned int freq)
{
unsigned long tmp;
/* Enable the Clock to DDR2/mDDR */
am1808_lpc_transition(1, 6, 0, PSC_ENABLE);
tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
if ((tmp & VTP_POWERDWN) == VTP_POWERDWN) {
/* Begin VTP Calibration */
clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
clrbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_CLKRZ);
/* Polling READY bit to see when VTP calibration is done */
tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
while ((tmp & VTP_READY) != VTP_READY)
tmp = readl(&davinci_syscfg1_regs->vtpio_ctl);
setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK);
setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN);
setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN);
}
writel(CONFIG_SYS_AM1808_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr);
clrbits_le32(&davinci_syscfg1_regs->ddr_slew,
(1 << DDR_SLEW_CMOSEN_BIT));
setbits_le32(&dv_ddr2_regs_ctrl->sdbcr, DV_DDR_BOOTUNLOCK);
writel((CONFIG_SYS_AM1808_DDR2_SDBCR & ~0xf0000000) |
(readl(&dv_ddr2_regs_ctrl->sdbcr) & 0xf0000000), /*rsv Bytes*/
&dv_ddr2_regs_ctrl->sdbcr);
writel(CONFIG_SYS_AM1808_DDR2_SDBCR2, &dv_ddr2_regs_ctrl->sdbcr2);
writel(CONFIG_SYS_AM1808_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr);
writel(CONFIG_SYS_AM1808_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2);
clrbits_le32(&dv_ddr2_regs_ctrl->sdbcr,
(1 << DV_DDR_SDCR_TIMUNLOCK_SHIFT));
/*
* LPMODEN and MCLKSTOPEN must be set!
* Without this bits set, PSC don;t switch states !!
*/
writel(CONFIG_SYS_AM1808_DDR2_SDRCR |
(1 << DV_DDR_SRCR_LPMODEN_SHIFT) |
(1 << DV_DDR_SRCR_MCLKSTOPEN_SHIFT),
&dv_ddr2_regs_ctrl->sdrcr);
/* SyncReset the Clock to EMIF3A SDRAM */
am1808_lpc_transition(1, 6, 0, PSC_SYNCRESET);
/* Enable the Clock to EMIF3A SDRAM */
am1808_lpc_transition(1, 6, 0, PSC_ENABLE);
/* disable self refresh */
clrbits_le32(&dv_ddr2_regs_ctrl->sdrcr, 0xc0000000);
writel(0x30, &dv_ddr2_regs_ctrl->pbbpr);
return 0;
}
static void am1808_set_mdctl(dv_reg_p mdctl)
{
if ((readl(mdctl) & 0x1F) != PSC_ENABLE)
writel(((readl(mdctl) & 0xFFFFFFE0) | PSC_ENABLE), mdctl);
}
void am1808_psc_init(void)
{
struct davinci_psc_regs *reg;
int i;
/* PSC 0 domain 0 init */
reg = davinci_psc0_regs;
while ((readl(&reg->ptstat) & 0x00000001))
;
for (i = 3; i <= 4 ; i++)
am1808_set_mdctl(&reg->psc0.mdctl[i]);
for (i = 7; i <= 12 ; i++)
am1808_set_mdctl(&reg->psc0.mdctl[i]);
/* Do Always-On Power Domain Transitions */
setbits_le32(&reg->ptcmd, 0x00000001);
while (readl(&reg->ptstat) & 0x00000001)
;
/* PSC1, domain 1 init */
reg = davinci_psc1_regs;
while ((readl(&reg->ptstat) & 0x00000001))
;
am1808_set_mdctl(&reg->psc1.mdctl[3]);
am1808_set_mdctl(&reg->psc1.mdctl[6]);
/* UART1 + UART2 */
for (i = 12 ; i <= 13 ; i++)
am1808_set_mdctl(&reg->psc1.mdctl[i]);
am1808_set_mdctl(&reg->psc1.mdctl[26]);
am1808_set_mdctl(&reg->psc1.mdctl[31]);
/* Do Always-On Power Domain Transitions */
setbits_le32(&reg->ptcmd, 0x00000001);
while (readl(&reg->ptstat) & 0x00000001)
;
}
void am1808_pinmux_ctl(unsigned long offset, unsigned long mask,
unsigned long value)
{
clrbits_le32(&davinci_syscfg_regs->pinmux[offset], mask);
setbits_le32(&davinci_syscfg_regs->pinmux[offset], (mask & value));
}
__attribute__((weak))
void board_gpio_init(void)
{
return;
}
#if defined(CONFIG_NAND_SPL)
void nand_boot(void)
{
__attribute__((noreturn)) void (*uboot)(void);
/* copy image from NOR to RAM */
memcpy((void *)CONFIG_SYS_NAND_U_BOOT_DST,
(void *)CONFIG_SYS_NAND_U_BOOT_OFFS,
CONFIG_SYS_NAND_U_BOOT_SIZE);
/* and jump to it ... */
uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
(*uboot)();
}
#endif
#if defined(CONFIG_NAND_SPL)
void board_init_f(ulong bootflag)
#else
int arch_cpu_init(void)
#endif
{
/*
* copied from arch/arm/cpu/arm926ejs/start.S
*
* flush v4 I/D caches
*/
asm("mov r0, #0");
asm("mcr p15, 0, r0, c7, c7, 0"); /* flush v3/v4 cache */
asm("mcr p15, 0, r0, c8, c7, 0"); /* flush v4 TLB */
/*
* disable MMU stuff and caches
*/
asm("mrc p15, 0, r0, c1, c0, 0");
/* clear bits 13, 9:8 (--V- --RS) */
asm("bic r0, r0, #0x00002300");
/* clear bits 7, 2:0 (B--- -CAM) */
asm("bic r0, r0, #0x00000087");
/* set bit 2 (A) Align */
asm("orr r0, r0, #0x00000002");
/* set bit 12 (I) I-Cache */
asm("orr r0, r0, #0x00001000");
asm("mcr p15, 0, r0, c1, c0, 0");
/* Unlock kick registers */
writel(0x83e70b13, &davinci_syscfg_regs->kick0);
writel(0x95a4f1e0, &davinci_syscfg_regs->kick1);
dv_maskbits(&davinci_syscfg_regs->suspsrc,
((1 << 27) | (1 << 22) | (1 << 20) | (1 << 5) | (1 << 16)));
/* System PSC setup - enable all */
am1808_psc_init();
/* Setup Pinmux */
am1808_pinmux_ctl(0, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX0);
am1808_pinmux_ctl(1, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX1);
am1808_pinmux_ctl(2, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX2);
am1808_pinmux_ctl(3, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX3);
am1808_pinmux_ctl(4, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX4);
am1808_pinmux_ctl(5, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX5);
am1808_pinmux_ctl(6, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX6);
am1808_pinmux_ctl(7, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX7);
am1808_pinmux_ctl(8, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX8);
am1808_pinmux_ctl(9, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX9);
am1808_pinmux_ctl(10, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX10);
am1808_pinmux_ctl(11, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX11);
am1808_pinmux_ctl(12, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX12);
am1808_pinmux_ctl(13, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX13);
am1808_pinmux_ctl(14, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX14);
am1808_pinmux_ctl(15, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX15);
am1808_pinmux_ctl(16, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX16);
am1808_pinmux_ctl(17, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX17);
am1808_pinmux_ctl(18, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX18);
am1808_pinmux_ctl(19, 0xFFFFFFFF, CONFIG_SYS_AM1808_PINMUX19);
/* PLL setup */
am1808_pll_init(davinci_pllc0_regs, CONFIG_SYS_AM1808_PLL0_PLLM);
am1808_pll_init(davinci_pllc1_regs, CONFIG_SYS_AM1808_PLL1_PLLM);
/* GPIO setup */
board_gpio_init();
/* setup CSn config */
writel(CONFIG_SYS_AM1808_CS2CFG, &davinci_emif_regs->ab1cr);
writel(CONFIG_SYS_AM1808_CS3CFG, &davinci_emif_regs->ab2cr);
am1808_lpc_transition(1, 13, 0, PSC_ENABLE);
NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1),
CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
/*
* Fix Power and Emulation Management Register
* see sprufw3a.pdf page 37 Table 24
*/
writel(readl((CONFIG_SYS_NS16550_COM1 + 0x30)) | 0x00006001,
(CONFIG_SYS_NS16550_COM1 + 0x30));
#if defined(CONFIG_NAND_SPL)
puts("ddr init\n");
am1808_ddr_setup(132);
puts("boot u-boot ...\n");
nand_boot();
#else
am1808_ddr_setup(132);
return 0;
#endif
}

44
arch/arm/include/asm/arch-davinci/am1808_lowlevel.h Normal file
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@ -0,0 +1,44 @@
/*
* SoC-specific lowlevel code for AM1808 and similar chips
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __AM1808_LOWLEVEL_H
#define __AM1808_LOWLEVEL_H
/* NOR Boot Configuration Word Field Descriptions */
#define AM1808_NORBOOT_COPY_XK(X) ((X - 1) << 8)
#define AM1808_NORBOOT_METHOD_DIRECT (1 << 4)
#define AM1808_NORBOOT_16BIT (1 << 0)
#define dv_maskbits(addr, val) \
writel((readl(addr) & val), addr)
void am1808_waitloop(unsigned long loopcnt);
int am1808_pll_init(struct davinci_pllc_regs *reg, unsigned long pllmult);
void am1808_lpc_transition(unsigned char pscnum, unsigned char module,
unsigned char domain, unsigned char state);
int am1808_ddr_setup(unsigned int freq);
void am1808_psc_init(void);
void am1808_pinmux_ctl(unsigned long offset, unsigned long mask,
unsigned long value);
#endif /* #ifndef __AM1808_LOWLEVEL_H */