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linux_dsm_epyc7002/arch/arm/mach-omap2/control.c
Tony Lindgren b96b332fd5 ARM: OMAP3: Add support for configuring MMC pins as GPIO pins 
Some devices are using the MMC1 pins 4..8 as GPIO pins, and in
this case they need to be configured for 1.8V IO voltage if not
done by the bootloader as otherwise some devices like smsc911x
won't work properly.

Let's also make sure this register is saved and restored for
idle.

Cc: Tim Nordell <tim.nordell@logicpd.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-05-20 09:23:43 -07:00

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/*
* OMAP2/3 System Control Module register access
*
* Copyright (C) 2007, 2012 Texas Instruments, Inc.
* Copyright (C) 2007 Nokia Corporation
*
* Written by Paul Walmsley
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include "soc.h"
#include "iomap.h"
#include "common.h"
#include "cm-regbits-34xx.h"
#include "prm-regbits-34xx.h"
#include "prm3xxx.h"
#include "cm3xxx.h"
#include "sdrc.h"
#include "pm.h"
#include "control.h"
#include "clock.h"
/* Used by omap3_ctrl_save_padconf() */
#define START_PADCONF_SAVE 0x2
#define PADCONF_SAVE_DONE 0x1
static void __iomem *omap2_ctrl_base;
static s16 omap2_ctrl_offset;
static struct regmap *omap2_ctrl_syscon;
#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
struct omap3_scratchpad {
u32 boot_config_ptr;
u32 public_restore_ptr;
u32 secure_ram_restore_ptr;
u32 sdrc_module_semaphore;
u32 prcm_block_offset;
u32 sdrc_block_offset;
};
struct omap3_scratchpad_prcm_block {
u32 prm_contents[2];
u32 cm_contents[11];
u32 prcm_block_size;
};
struct omap3_scratchpad_sdrc_block {
u16 sysconfig;
u16 cs_cfg;
u16 sharing;
u16 err_type;
u32 dll_a_ctrl;
u32 dll_b_ctrl;
u32 power;
u32 cs_0;
u32 mcfg_0;
u16 mr_0;
u16 emr_1_0;
u16 emr_2_0;
u16 emr_3_0;
u32 actim_ctrla_0;
u32 actim_ctrlb_0;
u32 rfr_ctrl_0;
u32 cs_1;
u32 mcfg_1;
u16 mr_1;
u16 emr_1_1;
u16 emr_2_1;
u16 emr_3_1;
u32 actim_ctrla_1;
u32 actim_ctrlb_1;
u32 rfr_ctrl_1;
u16 dcdl_1_ctrl;
u16 dcdl_2_ctrl;
u32 flags;
u32 block_size;
};
void *omap3_secure_ram_storage;
/*
* This is used to store ARM registers in SDRAM before attempting
* an MPU OFF. The save and restore happens from the SRAM sleep code.
* The address is stored in scratchpad, so that it can be used
* during the restore path.
*/
u32 omap3_arm_context[128];
struct omap3_control_regs {
u32 sysconfig;
u32 devconf0;
u32 mem_dftrw0;
u32 mem_dftrw1;
u32 msuspendmux_0;
u32 msuspendmux_1;
u32 msuspendmux_2;
u32 msuspendmux_3;
u32 msuspendmux_4;
u32 msuspendmux_5;
u32 sec_ctrl;
u32 devconf1;
u32 csirxfe;
u32 iva2_bootaddr;
u32 iva2_bootmod;
u32 wkup_ctrl;
u32 debobs_0;
u32 debobs_1;
u32 debobs_2;
u32 debobs_3;
u32 debobs_4;
u32 debobs_5;
u32 debobs_6;
u32 debobs_7;
u32 debobs_8;
u32 prog_io0;
u32 prog_io1;
u32 dss_dpll_spreading;
u32 core_dpll_spreading;
u32 per_dpll_spreading;
u32 usbhost_dpll_spreading;
u32 pbias_lite;
u32 temp_sensor;
u32 sramldo4;
u32 sramldo5;
u32 csi;
u32 padconf_sys_nirq;
};
static struct omap3_control_regs control_context;
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
void __init omap2_set_globals_control(void __iomem *ctrl)
{
omap2_ctrl_base = ctrl;
}
u8 omap_ctrl_readb(u16 offset)
{
u32 val;
u8 byte_offset = offset & 0x3;
val = omap_ctrl_readl(offset);
return (val >> (byte_offset * 8)) & 0xff;
}
u16 omap_ctrl_readw(u16 offset)
{
u32 val;
u16 byte_offset = offset & 0x2;
val = omap_ctrl_readl(offset);
return (val >> (byte_offset * 8)) & 0xffff;
}
u32 omap_ctrl_readl(u16 offset)
{
u32 val;
offset &= 0xfffc;
if (!omap2_ctrl_syscon)
val = readl_relaxed(omap2_ctrl_base + offset);
else
regmap_read(omap2_ctrl_syscon, omap2_ctrl_offset + offset,
&val);
return val;
}
void omap_ctrl_writeb(u8 val, u16 offset)
{
u32 tmp;
u8 byte_offset = offset & 0x3;
tmp = omap_ctrl_readl(offset);
tmp &= 0xffffffff ^ (0xff << (byte_offset * 8));
tmp |= val << (byte_offset * 8);
omap_ctrl_writel(tmp, offset);
}
void omap_ctrl_writew(u16 val, u16 offset)
{
u32 tmp;
u8 byte_offset = offset & 0x2;
tmp = omap_ctrl_readl(offset);
tmp &= 0xffffffff ^ (0xffff << (byte_offset * 8));
tmp |= val << (byte_offset * 8);
omap_ctrl_writel(tmp, offset);
}
void omap_ctrl_writel(u32 val, u16 offset)
{
offset &= 0xfffc;
if (!omap2_ctrl_syscon)
writel_relaxed(val, omap2_ctrl_base + offset);
else
regmap_write(omap2_ctrl_syscon, omap2_ctrl_offset + offset,
val);
}
#ifdef CONFIG_ARCH_OMAP3
/**
* omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
* @bootmode: 8-bit value to pass to some boot code
*
* Set the bootmode in the scratchpad RAM. This is used after the
* system restarts. Not sure what actually uses this - it may be the
* bootloader, rather than the boot ROM - contrary to the preserved
* comment below. No return value.
*/
void omap3_ctrl_write_boot_mode(u8 bootmode)
{
u32 l;
l = ('B' << 24) | ('M' << 16) | bootmode;
/*
* Reserve the first word in scratchpad for communicating
* with the boot ROM. A pointer to a data structure
* describing the boot process can be stored there,
* cf. OMAP34xx TRM, Initialization / Software Booting
* Configuration.
*
* XXX This should use some omap_ctrl_writel()-type function
*/
writel_relaxed(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
}
#endif
/**
* omap_ctrl_write_dsp_boot_addr - set boot address for a remote processor
* @bootaddr: physical address of the boot loader
*
* Set boot address for the boot loader of a supported processor
* when a power ON sequence occurs.
*/
void omap_ctrl_write_dsp_boot_addr(u32 bootaddr)
{
u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTADDR :
cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTADDR :
cpu_is_omap44xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
soc_is_omap54xx() ? OMAP4_CTRL_MODULE_CORE_DSP_BOOTADDR :
0;
if (!offset) {
pr_err("%s: unsupported omap type\n", __func__);
return;
}
omap_ctrl_writel(bootaddr, offset);
}
/**
* omap_ctrl_write_dsp_boot_mode - set boot mode for a remote processor
* @bootmode: 8-bit value to pass to some boot code
*
* Sets boot mode for the boot loader of a supported processor
* when a power ON sequence occurs.
*/
void omap_ctrl_write_dsp_boot_mode(u8 bootmode)
{
u32 offset = cpu_is_omap243x() ? OMAP243X_CONTROL_IVA2_BOOTMOD :
cpu_is_omap34xx() ? OMAP343X_CONTROL_IVA2_BOOTMOD :
0;
if (!offset) {
pr_err("%s: unsupported omap type\n", __func__);
return;
}
omap_ctrl_writel(bootmode, offset);
}
#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
/*
* Clears the scratchpad contents in case of cold boot-
* called during bootup
*/
void omap3_clear_scratchpad_contents(void)
{
u32 max_offset = OMAP343X_SCRATCHPAD_ROM_OFFSET;
void __iomem *v_addr;
u32 offset = 0;
v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
if (omap3xxx_prm_clear_global_cold_reset()) {
for ( ; offset <= max_offset; offset += 0x4)
writel_relaxed(0x0, (v_addr + offset));
}
}
/* Populate the scratchpad structure with restore structure */
void omap3_save_scratchpad_contents(void)
{
void __iomem *scratchpad_address;
u32 arm_context_addr;
struct omap3_scratchpad scratchpad_contents;
struct omap3_scratchpad_prcm_block prcm_block_contents;
struct omap3_scratchpad_sdrc_block sdrc_block_contents;
/*
* Populate the Scratchpad contents
*
* The "get_*restore_pointer" functions are used to provide a
* physical restore address where the ROM code jumps while waking
* up from MPU OFF/OSWR state.
* The restore pointer is stored into the scratchpad.
*/
scratchpad_contents.boot_config_ptr = 0x0;
if (cpu_is_omap3630())
scratchpad_contents.public_restore_ptr =
virt_to_phys(omap3_restore_3630);
else if (omap_rev() != OMAP3430_REV_ES3_0 &&
omap_rev() != OMAP3430_REV_ES3_1 &&
omap_rev() != OMAP3430_REV_ES3_1_2)
scratchpad_contents.public_restore_ptr =
virt_to_phys(omap3_restore);
else
scratchpad_contents.public_restore_ptr =
virt_to_phys(omap3_restore_es3);
if (omap_type() == OMAP2_DEVICE_TYPE_GP)
scratchpad_contents.secure_ram_restore_ptr = 0x0;
else
scratchpad_contents.secure_ram_restore_ptr =
(u32) __pa(omap3_secure_ram_storage);
scratchpad_contents.sdrc_module_semaphore = 0x0;
scratchpad_contents.prcm_block_offset = 0x2C;
scratchpad_contents.sdrc_block_offset = 0x64;
/* Populate the PRCM block contents */
omap3_prm_save_scratchpad_contents(prcm_block_contents.prm_contents);
omap3_cm_save_scratchpad_contents(prcm_block_contents.cm_contents);
prcm_block_contents.prcm_block_size = 0x0;
/* Populate the SDRC block contents */
sdrc_block_contents.sysconfig =
(sdrc_read_reg(SDRC_SYSCONFIG) & 0xFFFF);
sdrc_block_contents.cs_cfg =
(sdrc_read_reg(SDRC_CS_CFG) & 0xFFFF);
sdrc_block_contents.sharing =
(sdrc_read_reg(SDRC_SHARING) & 0xFFFF);
sdrc_block_contents.err_type =
(sdrc_read_reg(SDRC_ERR_TYPE) & 0xFFFF);
sdrc_block_contents.dll_a_ctrl = sdrc_read_reg(SDRC_DLLA_CTRL);
sdrc_block_contents.dll_b_ctrl = 0x0;
/*
* Due to a OMAP3 errata (1.142), on EMU/HS devices SRDC should
* be programed to issue automatic self refresh on timeout
* of AUTO_CNT = 1 prior to any transition to OFF mode.
*/
if ((omap_type() != OMAP2_DEVICE_TYPE_GP)
&& (omap_rev() >= OMAP3430_REV_ES3_0))
sdrc_block_contents.power = (sdrc_read_reg(SDRC_POWER) &
~(SDRC_POWER_AUTOCOUNT_MASK|
SDRC_POWER_CLKCTRL_MASK)) |
(1 << SDRC_POWER_AUTOCOUNT_SHIFT) |
SDRC_SELF_REFRESH_ON_AUTOCOUNT;
else
sdrc_block_contents.power = sdrc_read_reg(SDRC_POWER);
sdrc_block_contents.cs_0 = 0x0;
sdrc_block_contents.mcfg_0 = sdrc_read_reg(SDRC_MCFG_0);
sdrc_block_contents.mr_0 = (sdrc_read_reg(SDRC_MR_0) & 0xFFFF);
sdrc_block_contents.emr_1_0 = 0x0;
sdrc_block_contents.emr_2_0 = 0x0;
sdrc_block_contents.emr_3_0 = 0x0;
sdrc_block_contents.actim_ctrla_0 =
sdrc_read_reg(SDRC_ACTIM_CTRL_A_0);
sdrc_block_contents.actim_ctrlb_0 =
sdrc_read_reg(SDRC_ACTIM_CTRL_B_0);
sdrc_block_contents.rfr_ctrl_0 =
sdrc_read_reg(SDRC_RFR_CTRL_0);
sdrc_block_contents.cs_1 = 0x0;
sdrc_block_contents.mcfg_1 = sdrc_read_reg(SDRC_MCFG_1);
sdrc_block_contents.mr_1 = sdrc_read_reg(SDRC_MR_1) & 0xFFFF;
sdrc_block_contents.emr_1_1 = 0x0;
sdrc_block_contents.emr_2_1 = 0x0;
sdrc_block_contents.emr_3_1 = 0x0;
sdrc_block_contents.actim_ctrla_1 =
sdrc_read_reg(SDRC_ACTIM_CTRL_A_1);
sdrc_block_contents.actim_ctrlb_1 =
sdrc_read_reg(SDRC_ACTIM_CTRL_B_1);
sdrc_block_contents.rfr_ctrl_1 =
sdrc_read_reg(SDRC_RFR_CTRL_1);
sdrc_block_contents.dcdl_1_ctrl = 0x0;
sdrc_block_contents.dcdl_2_ctrl = 0x0;
sdrc_block_contents.flags = 0x0;
sdrc_block_contents.block_size = 0x0;
arm_context_addr = virt_to_phys(omap3_arm_context);
/* Copy all the contents to the scratchpad location */
scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);
memcpy_toio(scratchpad_address, &scratchpad_contents,
sizeof(scratchpad_contents));
/* Scratchpad contents being 32 bits, a divide by 4 done here */
memcpy_toio(scratchpad_address +
scratchpad_contents.prcm_block_offset,
&prcm_block_contents, sizeof(prcm_block_contents));
memcpy_toio(scratchpad_address +
scratchpad_contents.sdrc_block_offset,
&sdrc_block_contents, sizeof(sdrc_block_contents));
/*
* Copies the address of the location in SDRAM where ARM
* registers get saved during a MPU OFF transition.
*/
memcpy_toio(scratchpad_address +
scratchpad_contents.sdrc_block_offset +
sizeof(sdrc_block_contents), &arm_context_addr, 4);
}
void omap3_control_save_context(void)
{
control_context.sysconfig = omap_ctrl_readl(OMAP2_CONTROL_SYSCONFIG);
control_context.devconf0 = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
control_context.mem_dftrw0 =
omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW0);
control_context.mem_dftrw1 =
omap_ctrl_readl(OMAP343X_CONTROL_MEM_DFTRW1);
control_context.msuspendmux_0 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_0);
control_context.msuspendmux_1 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_1);
control_context.msuspendmux_2 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_2);
control_context.msuspendmux_3 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_3);
control_context.msuspendmux_4 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_4);
control_context.msuspendmux_5 =
omap_ctrl_readl(OMAP2_CONTROL_MSUSPENDMUX_5);
control_context.sec_ctrl = omap_ctrl_readl(OMAP2_CONTROL_SEC_CTRL);
control_context.devconf1 = omap_ctrl_readl(OMAP343X_CONTROL_DEVCONF1);
control_context.csirxfe = omap_ctrl_readl(OMAP343X_CONTROL_CSIRXFE);
control_context.iva2_bootaddr =
omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTADDR);
control_context.iva2_bootmod =
omap_ctrl_readl(OMAP343X_CONTROL_IVA2_BOOTMOD);
control_context.wkup_ctrl = omap_ctrl_readl(OMAP34XX_CONTROL_WKUP_CTRL);
control_context.debobs_0 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(0));
control_context.debobs_1 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(1));
control_context.debobs_2 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(2));
control_context.debobs_3 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(3));
control_context.debobs_4 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(4));
control_context.debobs_5 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(5));
control_context.debobs_6 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(6));
control_context.debobs_7 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(7));
control_context.debobs_8 = omap_ctrl_readl(OMAP343X_CONTROL_DEBOBS(8));
control_context.prog_io0 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO0);
control_context.prog_io1 = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
control_context.dss_dpll_spreading =
omap_ctrl_readl(OMAP343X_CONTROL_DSS_DPLL_SPREADING);
control_context.core_dpll_spreading =
omap_ctrl_readl(OMAP343X_CONTROL_CORE_DPLL_SPREADING);
control_context.per_dpll_spreading =
omap_ctrl_readl(OMAP343X_CONTROL_PER_DPLL_SPREADING);
control_context.usbhost_dpll_spreading =
omap_ctrl_readl(OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
control_context.pbias_lite =
omap_ctrl_readl(OMAP343X_CONTROL_PBIAS_LITE);
control_context.temp_sensor =
omap_ctrl_readl(OMAP343X_CONTROL_TEMP_SENSOR);
control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4);
control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5);
control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI);
control_context.padconf_sys_nirq =
omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ);
}
void omap3_control_restore_context(void)
{
omap_ctrl_writel(control_context.sysconfig, OMAP2_CONTROL_SYSCONFIG);
omap_ctrl_writel(control_context.devconf0, OMAP2_CONTROL_DEVCONF0);
omap_ctrl_writel(control_context.mem_dftrw0,
OMAP343X_CONTROL_MEM_DFTRW0);
omap_ctrl_writel(control_context.mem_dftrw1,
OMAP343X_CONTROL_MEM_DFTRW1);
omap_ctrl_writel(control_context.msuspendmux_0,
OMAP2_CONTROL_MSUSPENDMUX_0);
omap_ctrl_writel(control_context.msuspendmux_1,
OMAP2_CONTROL_MSUSPENDMUX_1);
omap_ctrl_writel(control_context.msuspendmux_2,
OMAP2_CONTROL_MSUSPENDMUX_2);
omap_ctrl_writel(control_context.msuspendmux_3,
OMAP2_CONTROL_MSUSPENDMUX_3);
omap_ctrl_writel(control_context.msuspendmux_4,
OMAP2_CONTROL_MSUSPENDMUX_4);
omap_ctrl_writel(control_context.msuspendmux_5,
OMAP2_CONTROL_MSUSPENDMUX_5);
omap_ctrl_writel(control_context.sec_ctrl, OMAP2_CONTROL_SEC_CTRL);
omap_ctrl_writel(control_context.devconf1, OMAP343X_CONTROL_DEVCONF1);
omap_ctrl_writel(control_context.csirxfe, OMAP343X_CONTROL_CSIRXFE);
omap_ctrl_writel(control_context.iva2_bootaddr,
OMAP343X_CONTROL_IVA2_BOOTADDR);
omap_ctrl_writel(control_context.iva2_bootmod,
OMAP343X_CONTROL_IVA2_BOOTMOD);
omap_ctrl_writel(control_context.wkup_ctrl, OMAP34XX_CONTROL_WKUP_CTRL);
omap_ctrl_writel(control_context.debobs_0, OMAP343X_CONTROL_DEBOBS(0));
omap_ctrl_writel(control_context.debobs_1, OMAP343X_CONTROL_DEBOBS(1));
omap_ctrl_writel(control_context.debobs_2, OMAP343X_CONTROL_DEBOBS(2));
omap_ctrl_writel(control_context.debobs_3, OMAP343X_CONTROL_DEBOBS(3));
omap_ctrl_writel(control_context.debobs_4, OMAP343X_CONTROL_DEBOBS(4));
omap_ctrl_writel(control_context.debobs_5, OMAP343X_CONTROL_DEBOBS(5));
omap_ctrl_writel(control_context.debobs_6, OMAP343X_CONTROL_DEBOBS(6));
omap_ctrl_writel(control_context.debobs_7, OMAP343X_CONTROL_DEBOBS(7));
omap_ctrl_writel(control_context.debobs_8, OMAP343X_CONTROL_DEBOBS(8));
omap_ctrl_writel(control_context.prog_io0, OMAP343X_CONTROL_PROG_IO0);
omap_ctrl_writel(control_context.prog_io1, OMAP343X_CONTROL_PROG_IO1);
omap_ctrl_writel(control_context.dss_dpll_spreading,
OMAP343X_CONTROL_DSS_DPLL_SPREADING);
omap_ctrl_writel(control_context.core_dpll_spreading,
OMAP343X_CONTROL_CORE_DPLL_SPREADING);
omap_ctrl_writel(control_context.per_dpll_spreading,
OMAP343X_CONTROL_PER_DPLL_SPREADING);
omap_ctrl_writel(control_context.usbhost_dpll_spreading,
OMAP343X_CONTROL_USBHOST_DPLL_SPREADING);
omap_ctrl_writel(control_context.pbias_lite,
OMAP343X_CONTROL_PBIAS_LITE);
omap_ctrl_writel(control_context.temp_sensor,
OMAP343X_CONTROL_TEMP_SENSOR);
omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4);
omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5);
omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI);
omap_ctrl_writel(control_context.padconf_sys_nirq,
OMAP343X_CONTROL_PADCONF_SYSNIRQ);
}
void omap3630_ctrl_disable_rta(void)
{
if (!cpu_is_omap3630())
return;
omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL);
}
/**
* omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM
*
* Tell the SCM to start saving the padconf registers, then wait for
* the process to complete. Returns 0 unconditionally, although it
* should also eventually be able to return -ETIMEDOUT, if the save
* does not complete.
*
* XXX This function is missing a timeout. What should it be?
*/
int omap3_ctrl_save_padconf(void)
{
u32 cpo;
/* Save the padconf registers */
cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
cpo |= START_PADCONF_SAVE;
omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF);
/* wait for the save to complete */
while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
& PADCONF_SAVE_DONE))
udelay(1);
return 0;
}
/**
* omap3_ctrl_set_iva_bootmode_idle - sets the IVA2 bootmode to idle
*
* Sets the bootmode for IVA2 to idle. This is needed by the PM code to
* force disable IVA2 so that it does not prevent any low-power states.
*/
static void __init omap3_ctrl_set_iva_bootmode_idle(void)
{
omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
OMAP343X_CONTROL_IVA2_BOOTMOD);
}
/**
* omap3_ctrl_setup_d2d_padconf - setup stacked modem pads for idle
*
* Sets up the pads controlling the stacked modem in such way that the
* device can enter idle.
*/
static void __init omap3_ctrl_setup_d2d_padconf(void)
{
u16 mask, padconf;
/*
* In a stand alone OMAP3430 where there is not a stacked
* modem for the D2D Idle Ack and D2D MStandby must be pulled
* high. S CONTROL_PADCONF_SAD2D_IDLEACK and
* CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up.
*/
mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
padconf |= mask;
omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
padconf |= mask;
omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
}
/**
* omap3_ctrl_init - does static initializations for control module
*
* Initializes system control module. This sets up the sysconfig autoidle,
* and sets up modem and iva2 so that they can be idled properly.
*/
void __init omap3_ctrl_init(void)
{
omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
omap3_ctrl_set_iva_bootmode_idle();
omap3_ctrl_setup_d2d_padconf();
}
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
struct control_init_data {
int index;
s16 offset;
};
static struct control_init_data ctrl_data = {
.index = TI_CLKM_CTRL,
};
static const struct control_init_data omap2_ctrl_data = {
.index = TI_CLKM_CTRL,
.offset = -OMAP2_CONTROL_GENERAL,
};
static const struct of_device_id omap_scrm_dt_match_table[] = {
{ .compatible = "ti,am3-scm", .data = &ctrl_data },
{ .compatible = "ti,am4-scm", .data = &ctrl_data },
{ .compatible = "ti,omap2-scm", .data = &omap2_ctrl_data },
{ .compatible = "ti,omap3-scm", .data = &omap2_ctrl_data },
{ .compatible = "ti,dm816-scrm", .data = &ctrl_data },
{ .compatible = "ti,omap4-scm-core", .data = &ctrl_data },
{ .compatible = "ti,omap5-scm-core", .data = &ctrl_data },
{ .compatible = "ti,dra7-scm-core", .data = &ctrl_data },
{ }
};
/**
* omap2_control_base_init - initialize iomappings for the control driver
*
* Detects and initializes the iomappings for the control driver, based
* on the DT data. Returns 0 in success, negative error value
* otherwise.
*/
int __init omap2_control_base_init(void)
{
struct device_node *np;
const struct of_device_id *match;
struct control_init_data *data;
for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
data = (struct control_init_data *)match->data;
omap2_ctrl_base = of_iomap(np, 0);
if (!omap2_ctrl_base)
return -ENOMEM;
omap2_ctrl_offset = data->offset;
}
return 0;
}
/**
* omap_control_init - low level init for the control driver
*
* Initializes the low level clock infrastructure for control driver.
* Returns 0 in success, negative error value in failure.
*/
int __init omap_control_init(void)
{
struct device_node *np, *scm_conf;
const struct of_device_id *match;
const struct omap_prcm_init_data *data;
int ret;
struct regmap *syscon;
for_each_matching_node_and_match(np, omap_scrm_dt_match_table, &match) {
data = match->data;
/*
* Check if we have scm_conf node, if yes, use this to
* access clock registers.
*/
scm_conf = of_get_child_by_name(np, "scm_conf");
if (scm_conf) {
syscon = syscon_node_to_regmap(scm_conf);
if (IS_ERR(syscon))
return PTR_ERR(syscon);
omap2_ctrl_syscon = syscon;
if (of_get_child_by_name(scm_conf, "clocks")) {
ret = omap2_clk_provider_init(scm_conf,
data->index,
syscon, NULL);
if (ret)
return ret;
}
iounmap(omap2_ctrl_base);
omap2_ctrl_base = NULL;
} else {
/* No scm_conf found, direct access */
ret = omap2_clk_provider_init(np, data->index, NULL,
omap2_ctrl_base);
if (ret)
return ret;
}
}
return 0;
}
/**
* omap3_control_legacy_iomap_init - legacy iomap init for clock providers
*
* Legacy iomap init for clock provider. Needed only by legacy boot mode,
* where the base addresses are not parsed from DT, but still required
* by the clock driver to be setup properly.
*/
void __init omap3_control_legacy_iomap_init(void)
{
omap2_clk_legacy_provider_init(TI_CLKM_SCRM, omap2_ctrl_base);
}
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