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linux-next/arch/arm/mach-omap2/control.c
Rajendra Nayak f265dc4c5d OMAP3: PM: Program SDRC to send self refresh on timeout of AUTO_CNT 
Due to an OMAP3 errata (1.142), on HS/EMU devices SDRC should be
programed to issue automatic self refresh on timeout
of AUTO_CNT = 1 prior to any transition to OFF mode.
This is needed only on sil rev's ES3.0 and above.

This patch enables the above needed WA in the SDRC power register
value stored in scratchpad, so that ROM code restores this value
in SDRC POWER on the wakeup path.
The original SDRC POWER register value is stored and restored back
in omap_sram_idle() function.

This fixes some random crashes observed while stressing suspend
on HS/EMU devices.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00

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/*
* OMAP2/3 System Control Module register access
*
* Copyright (C) 2007 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 <plat/common.h>
#include <plat/control.h>
#include <plat/sdrc.h>
#include "cm-regbits-34xx.h"
#include "prm-regbits-34xx.h"
#include "cm.h"
#include "prm.h"
#include "sdrc.h"
static void __iomem *omap2_ctrl_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_clksel_core;
u32 cm_clksel_wkup;
u32 cm_clken_pll;
u32 cm_autoidle_pll;
u32 cm_clksel1_pll;
u32 cm_clksel2_pll;
u32 cm_clksel3_pll;
u32 cm_clken_pll_mpu;
u32 cm_autoidle_pll_mpu;
u32 cm_clksel1_pll_mpu;
u32 cm_clksel2_pll_mpu;
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;
};
static struct omap3_control_regs control_context;
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
#define OMAP_CTRL_REGADDR(reg) (omap2_ctrl_base + (reg))
void __init omap2_set_globals_control(struct omap_globals *omap2_globals)
{
omap2_ctrl_base = omap2_globals->ctrl;
}
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));
}
#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;
u32 *v_addr;
u32 offset = 0;
v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM);
if (prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) &
OMAP3430_GLOBAL_COLD_RST) {
for ( ; offset <= max_offset; offset += 0x4)
__raw_writel(0x0, (v_addr + offset));
prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST, 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 */
scratchpad_contents.boot_config_ptr = 0x0;
if (omap_rev() != OMAP3430_REV_ES3_0 &&
omap_rev() != OMAP3430_REV_ES3_1)
scratchpad_contents.public_restore_ptr =
virt_to_phys(get_restore_pointer());
else
scratchpad_contents.public_restore_ptr =
virt_to_phys(get_es3_restore_pointer());
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 = prm_read_mod_reg(OMAP3430_GR_MOD,
OMAP3_PRM_CLKSRC_CTRL_OFFSET);
prcm_block_contents.prm_clksel = prm_read_mod_reg(OMAP3430_CCR_MOD,
OMAP3_PRM_CLKSEL_OFFSET);
prcm_block_contents.cm_clksel_core =
cm_read_mod_reg(CORE_MOD, CM_CLKSEL);
prcm_block_contents.cm_clksel_wkup =
cm_read_mod_reg(WKUP_MOD, CM_CLKSEL);
prcm_block_contents.cm_clken_pll =
cm_read_mod_reg(PLL_MOD, CM_CLKEN);
prcm_block_contents.cm_autoidle_pll =
cm_read_mod_reg(PLL_MOD, OMAP3430_CM_AUTOIDLE_PLL);
prcm_block_contents.cm_clksel1_pll =
cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL);
prcm_block_contents.cm_clksel2_pll =
cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL);
prcm_block_contents.cm_clksel3_pll =
cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3);
prcm_block_contents.cm_clken_pll_mpu =
cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL);
prcm_block_contents.cm_autoidle_pll_mpu =
cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL);
prcm_block_contents.cm_clksel1_pll_mpu =
cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL);
prcm_block_contents.cm_clksel2_pll_mpu =
cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL);
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);
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);
return;
}
#endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */
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