u-boot/arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c

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/*
* SoC-specific lowlevel code for tms320dm365 and similar chips
* Actually used for booting from NAND with nand_spl.
*
* 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/dm365_lowlevel.h>
#include <asm/arch/hardware.h>
void dm365_waitloop(unsigned long loopcnt)
{
unsigned long i;
for (i = 0; i < loopcnt; i++)
asm(" NOP");
}
int dm365_pll1_init(unsigned long pllmult, unsigned long prediv)
{
unsigned int clksrc = 0x0;
/* Power up the PLL */
clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLPWRDN);
clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_RES_9);
setbits_le32(&dv_pll0_regs->pllctl,
clksrc << PLLCTL_CLOCK_MODE_SHIFT);
/*
* Set PLLENSRC '0', PLL Enable(PLLEN) selection is controlled
* through MMR
*/
clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLENSRC);
/* Set PLLEN=0 => PLL BYPASS MODE */
clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLEN);
dm365_waitloop(150);
/* PLLRST=1(reset assert) */
setbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLRST);
dm365_waitloop(300);
/*Bring PLL out of Reset*/
clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLRST);
/* Program the Multiper and Pre-Divider for PLL1 */
writel(pllmult, &dv_pll0_regs->pllm);
writel(prediv, &dv_pll0_regs->prediv);
/* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 1 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE |
PLLSECCTL_TINITZ, &dv_pll0_regs->secctl);
/* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 0 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE,
&dv_pll0_regs->secctl);
/* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 0 */
writel(PLLSECCTL_STOPMODE, &dv_pll0_regs->secctl);
/* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 1 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TINITZ, &dv_pll0_regs->secctl);
/* Program the PostDiv for PLL1 */
writel(PLL_POSTDEN, &dv_pll0_regs->postdiv);
/* Post divider setting for PLL1 */
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV1, &dv_pll0_regs->plldiv1);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV2, &dv_pll0_regs->plldiv2);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV3, &dv_pll0_regs->plldiv3);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV4, &dv_pll0_regs->plldiv4);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV5, &dv_pll0_regs->plldiv5);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV6, &dv_pll0_regs->plldiv6);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV7, &dv_pll0_regs->plldiv7);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV8, &dv_pll0_regs->plldiv8);
writel(CONFIG_SYS_DM36x_PLL1_PLLDIV9, &dv_pll0_regs->plldiv9);
dm365_waitloop(300);
/* Set the GOSET bit */
writel(PLLCMD_GOSET, &dv_pll0_regs->pllcmd); /* Go */
dm365_waitloop(300);
/* Wait for PLL to LOCK */
while (!((readl(&dv_sys_module_regs->pll0_config) & PLL0_LOCK)
== PLL0_LOCK))
;
/* Enable the PLL Bit of PLLCTL*/
setbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLEN);
return 0;
}
int dm365_pll2_init(unsigned long pllm, unsigned long prediv)
{
unsigned int clksrc = 0x0;
/* Power up the PLL*/
clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLPWRDN);
/*
* Select the Clock Mode as Onchip Oscilator or External Clock on
* MXI pin
* VDB has input on MXI pin
*/
clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_RES_9);
setbits_le32(&dv_pll1_regs->pllctl,
clksrc << PLLCTL_CLOCK_MODE_SHIFT);
/*
* Set PLLENSRC '0', PLL Enable(PLLEN) selection is controlled
* through MMR
*/
clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLENSRC);
/* Set PLLEN=0 => PLL BYPASS MODE */
clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLEN);
dm365_waitloop(50);
/* PLLRST=1(reset assert) */
setbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLRST);
dm365_waitloop(300);
/* Bring PLL out of Reset */
clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLRST);
/* Program the Multiper and Pre-Divider for PLL2 */
writel(pllm, &dv_pll1_regs->pllm);
writel(prediv, &dv_pll1_regs->prediv);
writel(PLL_POSTDEN, &dv_pll1_regs->postdiv);
/* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 1 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE |
PLLSECCTL_TINITZ, &dv_pll1_regs->secctl);
/* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 0 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE,
&dv_pll1_regs->secctl);
/* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 0 */
writel(PLLSECCTL_STOPMODE, &dv_pll1_regs->secctl);
/* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 1 */
writel(PLLSECCTL_STOPMODE | PLLSECCTL_TINITZ, &dv_pll1_regs->secctl);
/* Post divider setting for PLL2 */
writel(CONFIG_SYS_DM36x_PLL2_PLLDIV1, &dv_pll1_regs->plldiv1);
writel(CONFIG_SYS_DM36x_PLL2_PLLDIV2, &dv_pll1_regs->plldiv2);
writel(CONFIG_SYS_DM36x_PLL2_PLLDIV3, &dv_pll1_regs->plldiv3);
writel(CONFIG_SYS_DM36x_PLL2_PLLDIV4, &dv_pll1_regs->plldiv4);
writel(CONFIG_SYS_DM36x_PLL2_PLLDIV5, &dv_pll1_regs->plldiv5);
/* GoCmd for PostDivider to take effect */
writel(PLLCMD_GOSET, &dv_pll1_regs->pllcmd);
dm365_waitloop(150);
/* Wait for PLL to LOCK */
while (!((readl(&dv_sys_module_regs->pll1_config) & PLL1_LOCK)
== PLL1_LOCK))
;
dm365_waitloop(4100);
/* Enable the PLL2 */
setbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLEN);
/* do this after PLL's have been set up */
writel(CONFIG_SYS_DM36x_PERI_CLK_CTRL,
&dv_sys_module_regs->peri_clkctl);
return 0;
}
int dm365_ddr_setup(void)
{
lpsc_on(DAVINCI_LPSC_DDR_EMIF);
clrbits_le32(&dv_sys_module_regs->vtpiocr,
VPTIO_IOPWRDN | VPTIO_CLRZ | VPTIO_LOCK | VPTIO_PWRDN);
/* Set bit CLRZ (bit 13) */
setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_CLRZ);
/* Check VTP READY Status */
while (!(readl(&dv_sys_module_regs->vtpiocr) & VPTIO_RDY))
;
/* Set bit VTP_IOPWRDWN bit 14 for DDR input buffers) */
setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_IOPWRDN);
/* Set bit LOCK(bit7) */
setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_LOCK);
/*
* Powerdown VTP as it is locked (bit 6)
* Set bit VTP_IOPWRDWN bit 14 for DDR input buffers)
*/
setbits_le32(&dv_sys_module_regs->vtpiocr,
VPTIO_IOPWRDN | VPTIO_PWRDN);
/* Wait for calibration to complete */
dm365_waitloop(150);
/* Set the DDR2 to synreset, then enable it again */
lpsc_syncreset(DAVINCI_LPSC_DDR_EMIF);
lpsc_on(DAVINCI_LPSC_DDR_EMIF);
writel(CONFIG_SYS_DM36x_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr);
/* Program SDRAM Bank Config Register */
writel((CONFIG_SYS_DM36x_DDR2_SDBCR | DV_DDR_BOOTUNLOCK),
&dv_ddr2_regs_ctrl->sdbcr);
writel((CONFIG_SYS_DM36x_DDR2_SDBCR | DV_DDR_TIMUNLOCK),
&dv_ddr2_regs_ctrl->sdbcr);
/* Program SDRAM Timing Control Register1 */
writel(CONFIG_SYS_DM36x_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr);
/* Program SDRAM Timing Control Register2 */
writel(CONFIG_SYS_DM36x_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2);
writel(CONFIG_SYS_DM36x_DDR2_PBBPR, &dv_ddr2_regs_ctrl->pbbpr);
writel(CONFIG_SYS_DM36x_DDR2_SDBCR, &dv_ddr2_regs_ctrl->sdbcr);
/* Program SDRAM Refresh Control Register */
writel(CONFIG_SYS_DM36x_DDR2_SDRCR, &dv_ddr2_regs_ctrl->sdrcr);
lpsc_syncreset(DAVINCI_LPSC_DDR_EMIF);
lpsc_on(DAVINCI_LPSC_DDR_EMIF);
return 0;
}
static void dm365_vpss_sync_reset(void)
{
unsigned int PdNum = 0;
/* VPSS_CLKMD 1:1 */
setbits_le32(&dv_sys_module_regs->vpss_clkctl,
VPSS_CLK_CTL_VPSS_CLKMD);
/* LPSC SyncReset DDR Clock Enable */
writel(((readl(&dv_psc_regs->mdctl[DAVINCI_LPSC_VPSSMASTER]) &
~PSC_MD_STATE_MSK) | PSC_SYNCRESET),
&dv_psc_regs->mdctl[DAVINCI_LPSC_VPSSMASTER]);
writel((1 << PdNum), &dv_psc_regs->ptcmd);
while (!(((readl(&dv_psc_regs->ptstat) >> PdNum) & PSC_GOSTAT) == 0))
;
while (!((readl(&dv_psc_regs->mdstat[DAVINCI_LPSC_VPSSMASTER]) &
PSC_MD_STATE_MSK) == PSC_SYNCRESET))
;
}
static void dm365_por_reset(void)
{
struct davinci_timer *wdog =
(struct davinci_timer *)DAVINCI_WDOG_BASE;
if (readl(&dv_pll0_regs->rstype) &
(PLL_RSTYPE_POR | PLL_RSTYPE_XWRST)) {
dm365_vpss_sync_reset();
writel(DV_TMPBUF_VAL, TMPBUF);
setbits_le32(TMPSTATUS, FLAG_PORRST);
writel(DV_WDT_ENABLE_SYS_RESET, &wdog->na1);
writel(DV_WDT_TRIGGER_SYS_RESET, &wdog->na2);
while (1);
}
}
static void dm365_wdt_reset(void)
{
struct davinci_timer *wdog =
(struct davinci_timer *)DAVINCI_WDOG_BASE;
if (readl(TMPBUF) != DV_TMPBUF_VAL) {
writel(DV_TMPBUF_VAL, TMPBUF);
setbits_le32(TMPSTATUS, FLAG_PORRST);
setbits_le32(TMPSTATUS, FLAG_FLGOFF);
dm365_waitloop(100);
dm365_vpss_sync_reset();
writel(DV_WDT_ENABLE_SYS_RESET, &wdog->na1);
writel(DV_WDT_TRIGGER_SYS_RESET, &wdog->na2);
while (1);
}
}
static void dm365_wdt_flag_on(void)
{
/* VPSS_CLKMD 1:2 */
clrbits_le32(&dv_sys_module_regs->vpss_clkctl,
VPSS_CLK_CTL_VPSS_CLKMD);
writel(0, TMPBUF);
setbits_le32(TMPSTATUS, FLAG_FLGON);
}
void dm365_psc_init(void)
{
unsigned char i = 0;
unsigned char lpsc_start;
unsigned char lpsc_end, lpscgroup, lpscmin, lpscmax;
unsigned int PdNum = 0;
lpscmin = 0;
lpscmax = 2;
for (lpscgroup = lpscmin; lpscgroup <= lpscmax; lpscgroup++) {
if (lpscgroup == 0) {
/* Enabling LPSC 3 to 28 SCR first */
lpsc_start = DAVINCI_LPSC_VPSSMSTR;
lpsc_end = DAVINCI_LPSC_TIMER1;
} else if (lpscgroup == 1) { /* Skip locked LPSCs [29-37] */
lpsc_start = DAVINCI_LPSC_CFG5;
lpsc_end = DAVINCI_LPSC_VPSSMASTER;
} else {
lpsc_start = DAVINCI_LPSC_MJCP;
lpsc_end = DAVINCI_LPSC_HDVICP;
}
/* NEXT=0x3, Enable LPSC's */
for (i = lpsc_start; i <= lpsc_end; i++)
setbits_le32(&dv_psc_regs->mdctl[i], PSC_ENABLE);
/*
* Program goctl to start transition sequence for LPSCs
* CSL_PSC_0_REGS->PTCMD = (1<<PdNum); Kick off Power
* Domain 0 Modules
*/
writel((1 << PdNum), &dv_psc_regs->ptcmd);
/*
* Wait for GOSTAT = NO TRANSITION from PSC for Powerdomain 0
*/
while (!(((readl(&dv_psc_regs->ptstat) >> PdNum) & PSC_GOSTAT)
== 0))
;
/* Wait for MODSTAT = ENABLE from LPSC's */
for (i = lpsc_start; i <= lpsc_end; i++)
while (!((readl(&dv_psc_regs->mdstat[i]) &
PSC_MD_STATE_MSK) == PSC_ENABLE))
;
}
}
static void dm365_emif_init(void)
{
writel(CONFIG_SYS_DM36x_AWCCR, &davinci_emif_regs->awccr);
writel(CONFIG_SYS_DM36x_AB1CR, &davinci_emif_regs->ab1cr);
setbits_le32(&davinci_emif_regs->nandfcr, DAVINCI_NANDFCR_CS2NAND);
writel(CONFIG_SYS_DM36x_AB2CR, &davinci_emif_regs->ab2cr);
return;
}
void dm365_pinmux_ctl(unsigned long offset, unsigned long mask,
unsigned long value)
{
clrbits_le32(&dv_sys_module_regs->pinmux[offset], mask);
setbits_le32(&dv_sys_module_regs->pinmux[offset], (mask & value));
}
__attribute__((weak))
void board_gpio_init(void)
{
return;
}
#if defined(CONFIG_POST)
int post_log(char *format, ...)
{
return 0;
}
#endif
void dm36x_lowlevel_init(ulong bootflag)
{
struct davinci_uart_ctrl_regs *davinci_uart_ctrl_regs =
(struct davinci_uart_ctrl_regs *)(CONFIG_SYS_NS16550_COM1 +
DAVINCI_UART_CTRL_BASE);
/* Mask all interrupts */
writel(DV_AINTC_INTCTL_IDMODE, &dv_aintc_regs->intctl);
writel(0x0, &dv_aintc_regs->eabase);
writel(0x0, &dv_aintc_regs->eint0);
writel(0x0, &dv_aintc_regs->eint1);
/* Clear all interrupts */
writel(0xffffffff, &dv_aintc_regs->fiq0);
writel(0xffffffff, &dv_aintc_regs->fiq1);
writel(0xffffffff, &dv_aintc_regs->irq0);
writel(0xffffffff, &dv_aintc_regs->irq1);
dm365_por_reset();
dm365_wdt_reset();
/* System PSC setup - enable all */
dm365_psc_init();
/* Setup Pinmux */
dm365_pinmux_ctl(0, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX0);
dm365_pinmux_ctl(1, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX1);
dm365_pinmux_ctl(2, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX2);
dm365_pinmux_ctl(3, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX3);
dm365_pinmux_ctl(4, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX4);
/* PLL setup */
dm365_pll1_init(CONFIG_SYS_DM36x_PLL1_PLLM,
CONFIG_SYS_DM36x_PLL1_PREDIV);
dm365_pll2_init(CONFIG_SYS_DM36x_PLL2_PLLM,
CONFIG_SYS_DM36x_PLL2_PREDIV);
/* GPIO setup */
board_gpio_init();
NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1),
CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE);
/*
* Fix Power and Emulation Management Register
* see sprufh2.pdf page 38 Table 22
*/
writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
DAVINCI_UART_PWREMU_MGMT_UTRST),
&davinci_uart_ctrl_regs->pwremu_mgmt);
puts("ddr init\n");
dm365_ddr_setup();
puts("emif init\n");
dm365_emif_init();
dm365_wdt_flag_on();
#if defined(CONFIG_POST)
/*
* Do memory tests, calls arch_memory_failure_handle()
* if error detected.
*/
memory_post_test(0);
#endif
}