u-boot/arch/arm/cpu/armv7/omap5/hwinit.c

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/*
*
* Functions for omap5 based boards.
*
* (C) Copyright 2011
* Texas Instruments, <www.ti.com>
*
* Author :
* Aneesh V <aneesh@ti.com>
* Steve Sakoman <steve@sakoman.com>
* Sricharan <r.sricharan@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/armv7.h>
#include <asm/arch/cpu.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/clock.h>
#include <linux/sizes.h>
#include <asm/utils.h>
#include <asm/arch/gpio.h>
#include <asm/emif.h>
#include <asm/omap_common.h>
DECLARE_GLOBAL_DATA_PTR;
u32 *const omap_si_rev = (u32 *)OMAP_SRAM_SCRATCH_OMAP_REV;
static struct gpio_bank gpio_bank_54xx[8] = {
{ (void *)OMAP54XX_GPIO1_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO2_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO3_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO4_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO5_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO6_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO7_BASE, METHOD_GPIO_24XX },
{ (void *)OMAP54XX_GPIO8_BASE, METHOD_GPIO_24XX },
};
const struct gpio_bank *const omap_gpio_bank = gpio_bank_54xx;
#ifdef CONFIG_SPL_BUILD
/* LPDDR2 specific IO settings */
static void io_settings_lpddr2(void)
{
const struct ctrl_ioregs *ioregs;
get_ioregs(&ioregs);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch1_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch1_1);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch2_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch2_1);
writel(ioregs->ctrl_lpddr2ch, (*ctrl)->control_lpddr2ch1_0);
writel(ioregs->ctrl_lpddr2ch, (*ctrl)->control_lpddr2ch1_1);
writel(ioregs->ctrl_ddrio_0, (*ctrl)->control_ddrio_0);
writel(ioregs->ctrl_ddrio_1, (*ctrl)->control_ddrio_1);
writel(ioregs->ctrl_ddrio_2, (*ctrl)->control_ddrio_2);
}
/* DDR3 specific IO settings */
static void io_settings_ddr3(void)
{
u32 io_settings = 0;
const struct ctrl_ioregs *ioregs;
get_ioregs(&ioregs);
writel(ioregs->ctrl_ddr3ch, (*ctrl)->control_ddr3ch1_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch1_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch1_1);
writel(ioregs->ctrl_ddr3ch, (*ctrl)->control_ddr3ch2_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch2_0);
writel(ioregs->ctrl_ddrch, (*ctrl)->control_ddrch2_1);
writel(ioregs->ctrl_ddrio_0, (*ctrl)->control_ddrio_0);
writel(ioregs->ctrl_ddrio_1, (*ctrl)->control_ddrio_1);
writel(ioregs->ctrl_ddrio_2, (*ctrl)->control_ddrio_2);
/* omap5432 does not use lpddr2 */
writel(ioregs->ctrl_lpddr2ch, (*ctrl)->control_lpddr2ch1_0);
writel(ioregs->ctrl_lpddr2ch, (*ctrl)->control_lpddr2ch1_1);
writel(ioregs->ctrl_emif_sdram_config_ext,
(*ctrl)->control_emif1_sdram_config_ext);
writel(ioregs->ctrl_emif_sdram_config_ext,
(*ctrl)->control_emif2_sdram_config_ext);
if (is_omap54xx()) {
/* Disable DLL select */
io_settings = (readl((*ctrl)->control_port_emif1_sdram_config)
& 0xFFEFFFFF);
writel(io_settings,
(*ctrl)->control_port_emif1_sdram_config);
io_settings = (readl((*ctrl)->control_port_emif2_sdram_config)
& 0xFFEFFFFF);
writel(io_settings,
(*ctrl)->control_port_emif2_sdram_config);
} else {
writel(ioregs->ctrl_ddr_ctrl_ext_0,
(*ctrl)->control_ddr_control_ext_0);
}
}
/*
* Some tuning of IOs for optimal power and performance
*/
void do_io_settings(void)
{
u32 io_settings = 0, mask = 0;
/* Impedance settings EMMC, C2C 1,2, hsi2 */
mask = (ds_mask << 2) | (ds_mask << 8) |
(ds_mask << 16) | (ds_mask << 18);
io_settings = readl((*ctrl)->control_smart1io_padconf_0) &
(~mask);
io_settings |= (ds_60_ohm << 8) | (ds_45_ohm << 16) |
(ds_45_ohm << 18) | (ds_60_ohm << 2);
writel(io_settings, (*ctrl)->control_smart1io_padconf_0);
/* Impedance settings Mcspi2 */
mask = (ds_mask << 30);
io_settings = readl((*ctrl)->control_smart1io_padconf_1) &
(~mask);
io_settings |= (ds_60_ohm << 30);
writel(io_settings, (*ctrl)->control_smart1io_padconf_1);
/* Impedance settings C2C 3,4 */
mask = (ds_mask << 14) | (ds_mask << 16);
io_settings = readl((*ctrl)->control_smart1io_padconf_2) &
(~mask);
io_settings |= (ds_45_ohm << 14) | (ds_45_ohm << 16);
writel(io_settings, (*ctrl)->control_smart1io_padconf_2);
/* Slew rate settings EMMC, C2C 1,2 */
mask = (sc_mask << 8) | (sc_mask << 16) | (sc_mask << 18);
io_settings = readl((*ctrl)->control_smart2io_padconf_0) &
(~mask);
io_settings |= (sc_fast << 8) | (sc_na << 16) | (sc_na << 18);
writel(io_settings, (*ctrl)->control_smart2io_padconf_0);
/* Slew rate settings hsi2, Mcspi2 */
mask = (sc_mask << 24) | (sc_mask << 28);
io_settings = readl((*ctrl)->control_smart2io_padconf_1) &
(~mask);
io_settings |= (sc_fast << 28) | (sc_fast << 24);
writel(io_settings, (*ctrl)->control_smart2io_padconf_1);
/* Slew rate settings C2C 3,4 */
mask = (sc_mask << 16) | (sc_mask << 18);
io_settings = readl((*ctrl)->control_smart2io_padconf_2) &
(~mask);
io_settings |= (sc_na << 16) | (sc_na << 18);
writel(io_settings, (*ctrl)->control_smart2io_padconf_2);
/* impedance and slew rate settings for usb */
mask = (usb_i_mask << 29) | (usb_i_mask << 26) | (usb_i_mask << 23) |
(usb_i_mask << 20) | (usb_i_mask << 17) | (usb_i_mask << 14);
io_settings = readl((*ctrl)->control_smart3io_padconf_1) &
(~mask);
io_settings |= (ds_60_ohm << 29) | (ds_60_ohm << 26) |
(ds_60_ohm << 23) | (sc_fast << 20) |
(sc_fast << 17) | (sc_fast << 14);
writel(io_settings, (*ctrl)->control_smart3io_padconf_1);
if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2)
io_settings_lpddr2();
else
io_settings_ddr3();
}
static const struct srcomp_params srcomp_parameters[NUM_SYS_CLKS] = {
{0x45, 0x1}, /* 12 MHz */
{-1, -1}, /* 13 MHz */
{0x63, 0x2}, /* 16.8 MHz */
{0x57, 0x2}, /* 19.2 MHz */
{0x20, 0x1}, /* 26 MHz */
{-1, -1}, /* 27 MHz */
{0x41, 0x3} /* 38.4 MHz */
};
void srcomp_enable(void)
{
u32 srcomp_value, mul_factor, div_factor, clk_val, i;
u32 sysclk_ind = get_sys_clk_index();
u32 omap_rev = omap_revision();
if (!is_omap54xx())
return;
mul_factor = srcomp_parameters[sysclk_ind].multiply_factor;
div_factor = srcomp_parameters[sysclk_ind].divide_factor;
for (i = 0; i < 4; i++) {
srcomp_value = readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value &=
~(MULTIPLY_FACTOR_XS_MASK | DIVIDE_FACTOR_XS_MASK);
srcomp_value |= (mul_factor << MULTIPLY_FACTOR_XS_SHIFT) |
(div_factor << DIVIDE_FACTOR_XS_SHIFT);
writel(srcomp_value, (*ctrl)->control_srcomp_north_side + i*4);
}
if ((omap_rev == OMAP5430_ES1_0) || (omap_rev == OMAP5432_ES1_0)) {
clk_val = readl((*prcm)->cm_coreaon_io_srcomp_clkctrl);
clk_val |= OPTFCLKEN_SRCOMP_FCLK_MASK;
writel(clk_val, (*prcm)->cm_coreaon_io_srcomp_clkctrl);
for (i = 0; i < 4; i++) {
srcomp_value =
readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value &= ~PWRDWN_XS_MASK;
writel(srcomp_value,
(*ctrl)->control_srcomp_north_side + i*4);
while (((readl((*ctrl)->control_srcomp_north_side + i*4)
& SRCODE_READ_XS_MASK) >>
SRCODE_READ_XS_SHIFT) == 0)
;
srcomp_value =
readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value &= ~OVERRIDE_XS_MASK;
writel(srcomp_value,
(*ctrl)->control_srcomp_north_side + i*4);
}
} else {
srcomp_value = readl((*ctrl)->control_srcomp_east_side_wkup);
srcomp_value &= ~(MULTIPLY_FACTOR_XS_MASK |
DIVIDE_FACTOR_XS_MASK);
srcomp_value |= (mul_factor << MULTIPLY_FACTOR_XS_SHIFT) |
(div_factor << DIVIDE_FACTOR_XS_SHIFT);
writel(srcomp_value, (*ctrl)->control_srcomp_east_side_wkup);
for (i = 0; i < 4; i++) {
srcomp_value =
readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value |= SRCODE_OVERRIDE_SEL_XS_MASK;
writel(srcomp_value,
(*ctrl)->control_srcomp_north_side + i*4);
srcomp_value =
readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value &= ~OVERRIDE_XS_MASK;
writel(srcomp_value,
(*ctrl)->control_srcomp_north_side + i*4);
}
srcomp_value =
readl((*ctrl)->control_srcomp_east_side_wkup);
srcomp_value |= SRCODE_OVERRIDE_SEL_XS_MASK;
writel(srcomp_value, (*ctrl)->control_srcomp_east_side_wkup);
srcomp_value =
readl((*ctrl)->control_srcomp_east_side_wkup);
srcomp_value &= ~OVERRIDE_XS_MASK;
writel(srcomp_value, (*ctrl)->control_srcomp_east_side_wkup);
clk_val = readl((*prcm)->cm_coreaon_io_srcomp_clkctrl);
clk_val |= OPTFCLKEN_SRCOMP_FCLK_MASK;
writel(clk_val, (*prcm)->cm_coreaon_io_srcomp_clkctrl);
clk_val = readl((*prcm)->cm_wkupaon_io_srcomp_clkctrl);
clk_val |= OPTFCLKEN_SRCOMP_FCLK_MASK;
writel(clk_val, (*prcm)->cm_wkupaon_io_srcomp_clkctrl);
for (i = 0; i < 4; i++) {
while (((readl((*ctrl)->control_srcomp_north_side + i*4)
& SRCODE_READ_XS_MASK) >>
SRCODE_READ_XS_SHIFT) == 0)
;
srcomp_value =
readl((*ctrl)->control_srcomp_north_side + i*4);
srcomp_value &= ~SRCODE_OVERRIDE_SEL_XS_MASK;
writel(srcomp_value,
(*ctrl)->control_srcomp_north_side + i*4);
}
while (((readl((*ctrl)->control_srcomp_east_side_wkup) &
SRCODE_READ_XS_MASK) >> SRCODE_READ_XS_SHIFT) == 0)
;
srcomp_value =
readl((*ctrl)->control_srcomp_east_side_wkup);
srcomp_value &= ~SRCODE_OVERRIDE_SEL_XS_MASK;
writel(srcomp_value, (*ctrl)->control_srcomp_east_side_wkup);
}
}
#endif
void config_data_eye_leveling_samples(u32 emif_base)
{
const struct ctrl_ioregs *ioregs;
get_ioregs(&ioregs);
/*EMIF_SDRAM_CONFIG_EXT-Read data eye leveling no of samples =4*/
if (emif_base == EMIF1_BASE)
writel(ioregs->ctrl_emif_sdram_config_ext_final,
(*ctrl)->control_emif1_sdram_config_ext);
else if (emif_base == EMIF2_BASE)
writel(ioregs->ctrl_emif_sdram_config_ext_final,
(*ctrl)->control_emif2_sdram_config_ext);
}
void init_omap_revision(void)
{
/*
* For some of the ES2/ES1 boards ID_CODE is not reliable:
* Also, ES1 and ES2 have different ARM revisions
* So use ARM revision for identification
*/
unsigned int rev = cortex_rev();
switch (readl(CONTROL_ID_CODE)) {
case OMAP5430_CONTROL_ID_CODE_ES1_0:
*omap_si_rev = OMAP5430_ES1_0;
if (rev == MIDR_CORTEX_A15_R2P2)
*omap_si_rev = OMAP5430_ES2_0;
break;
case OMAP5432_CONTROL_ID_CODE_ES1_0:
*omap_si_rev = OMAP5432_ES1_0;
if (rev == MIDR_CORTEX_A15_R2P2)
*omap_si_rev = OMAP5432_ES2_0;
break;
case OMAP5430_CONTROL_ID_CODE_ES2_0:
*omap_si_rev = OMAP5430_ES2_0;
break;
case OMAP5432_CONTROL_ID_CODE_ES2_0:
*omap_si_rev = OMAP5432_ES2_0;
break;
case DRA752_CONTROL_ID_CODE_ES1_0:
*omap_si_rev = DRA752_ES1_0;
break;
case DRA752_CONTROL_ID_CODE_ES1_1:
*omap_si_rev = DRA752_ES1_1;
break;
case DRA722_CONTROL_ID_CODE_ES1_0:
*omap_si_rev = DRA722_ES1_0;
break;
default:
*omap_si_rev = OMAP5430_SILICON_ID_INVALID;
}
}
void reset_cpu(ulong ignored)
{
u32 omap_rev = omap_revision();
/*
* WARM reset is not functional in case of OMAP5430 ES1.0 soc.
* So use cold reset in case instead.
*/
if (omap_rev == OMAP5430_ES1_0)
writel(PRM_RSTCTRL_RESET << 0x1, (*prcm)->prm_rstctrl);
else
writel(PRM_RSTCTRL_RESET, (*prcm)->prm_rstctrl);
}
u32 warm_reset(void)
{
return readl((*prcm)->prm_rstst) & PRM_RSTST_WARM_RESET_MASK;
}
ARM: OMAP5: Fix warm reset with USB cable connected Warm reset on OMAP5 freezes when USB cable is connected. Fix requires PRM_RSTTIME.RSTTIME1 to be programmed with the time for which reset should be held low for the voltages and the oscillator to reach stable state. There are 3 parameters to be considered for calculating the time, which are mostly board and PMIC dependent. -1- Time taken by the Oscillator to shut + restart -2- PMIC OTP times -3- Voltage rail ramp times, which inturn depends on the PMIC slew rate and value of the voltage ramp needed. In order to keep the code in u-boot simple, have a way for boards to specify a pre computed time directly using the 'CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC' option. If boards fail to specify the time, use a default as specified by 'CONFIG_DEFAULT_OMAP_RESET_TIME_MAX_USEC' instead. Using the default value translates into some ~22ms and should work in all cases. However in order to avoid this large delay hiding other bugs, its recommended that all boards look at their respective data sheets and specify a pre computed and optimal value using 'CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC' In order to help future board additions to compute this config option value, add a README at doc/README.omap-reset-time which explains how to compute the value. Also update the toplevel README with the additional option and pointers to doc/README.omap-reset-time. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> [rnayak@ti.com: Updated changelog and added the README] Signed-off-by: Rajendra Nayak <rnayak@ti.com>
2013-04-17 20:49:40 +00:00
void setup_warmreset_time(void)
{
u32 rst_time, rst_val;
#ifndef CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC
rst_time = CONFIG_DEFAULT_OMAP_RESET_TIME_MAX_USEC;
#else
rst_time = CONFIG_OMAP_PLATFORM_RESET_TIME_MAX_USEC;
#endif
rst_time = usec_to_32k(rst_time) << RSTTIME1_SHIFT;
if (rst_time > RSTTIME1_MASK)
rst_time = RSTTIME1_MASK;
rst_val = readl((*prcm)->prm_rsttime) & ~RSTTIME1_MASK;
rst_val |= rst_time;
writel(rst_val, (*prcm)->prm_rsttime);
}