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kernel-ark/arch/arm/mach-omap2/control.c
Tero Kristo 49e0340232 ARM: OMAP3: control: add API for setting IVA bootmode 
OMAP3 PM core requires IVA2 bootmode to be set to idle during init. Currently,
a direct register write is used for this. Add a new ctrl API for this purpose
instead.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2013-10-19 10:11:52 -06:00

584 lines
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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 "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"
/* Used by omap3_ctrl_save_padconf() */
#define START_PADCONF_SAVE 0x2
#define PADCONF_SAVE_DONE 0x1
static void __iomem *omap2_ctrl_base;
static void __iomem *omap4_ctrl_pad_base;
#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_clksrc_ctrl;
u32 prm_clksel;
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 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 */
#define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
#define OMAP4_CTRL_PAD_REGADDR(reg) (omap4_ctrl_pad_base + (reg))
void __init omap2_set_globals_control(void __iomem *ctrl,
void __iomem *ctrl_pad)
{
omap2_ctrl_base = ctrl;
omap4_ctrl_pad_base = ctrl_pad;
}
void __iomem *omap_ctrl_base_get(void)
{
return omap2_ctrl_base;
}
u8 omap_ctrl_readb(u16 offset)
{
return __raw_readb(OMAP_CTRL_REGADDR(offset));
}
u16 omap_ctrl_readw(u16 offset)
{
return __raw_readw(OMAP_CTRL_REGADDR(offset));
}
u32 omap_ctrl_readl(u16 offset)
{
return __raw_readl(OMAP_CTRL_REGADDR(offset));
}
void omap_ctrl_writeb(u8 val, u16 offset)
{
__raw_writeb(val, OMAP_CTRL_REGADDR(offset));
}
void omap_ctrl_writew(u16 val, u16 offset)
{
__raw_writew(val, OMAP_CTRL_REGADDR(offset));
}
void omap_ctrl_writel(u32 val, u16 offset)
{
__raw_writel(val, OMAP_CTRL_REGADDR(offset));
}
/*
* On OMAP4 control pad are not addressable from control
* core base. So the common omap_ctrl_read/write APIs breaks
* Hence export separate APIs to manage the omap4 pad control
* registers. This APIs will work only for OMAP4
*/
u32 omap4_ctrl_pad_readl(u16 offset)
{
return __raw_readl(OMAP4_CTRL_PAD_REGADDR(offset));
}
void omap4_ctrl_pad_writel(u32 val, u16 offset)
{
__raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset));
}
#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
*/
__raw_writel(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 (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
OMAP3430_GLOBAL_COLD_RST_MASK) {
for ( ; offset <= max_offset; offset += 0x4)
__raw_writel(0x0, (v_addr + offset));
omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK,
OMAP3430_GR_MOD,
OMAP3_PRM_RSTST_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)
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 */
prcm_block_contents.prm_clksrc_ctrl =
omap2_prm_read_mod_reg(OMAP3430_GR_MOD,
OMAP3_PRM_CLKSRC_CTRL_OFFSET);
prcm_block_contents.prm_clksel =
omap2_prm_read_mod_reg(OMAP3430_CCR_MOD,
OMAP3_PRM_CLKSEL_OFFSET);
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.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);
return;
}
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.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);
return;
}
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.
*/
void omap3_ctrl_set_iva_bootmode_idle(void)
{
omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
OMAP343X_CONTROL_IVA2_BOOTMOD);
}
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
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