linux/arch/arm/mach-omap2/prm44xx.c

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/*
* OMAP4 PRM module functions
*
* Copyright (C) 2011-2012 Texas Instruments, Inc.
* Copyright (C) 2010 Nokia Corporation
* Benoît Cousson
* Paul Walmsley
* Rajendra Nayak <rnayak@ti.com>
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/err.h>
OMAP4: PRCM: add OMAP4-specific accessor/mutator functions In some ways, the OMAP4 PRCM register layout is quite different than the OMAP2/3 PRCM register layout. For example, on OMAP2/3, from a register layout point of view, all CM instances were located in the CM subsystem, and all PRM instances were located in the PRM subsystem. OMAP4 changes this. Now, for example, some CM instances, such as WKUP_CM and EMU_CM, are located in the system PRM subsystem. And a "local PRCM" exists for the MPU - this PRCM combines registers that would normally appear in both CM and PRM instances, but uses its own register layout which matches neither the OMAP2/3 PRCM layout nor the OMAP4 PRCM layout. To try to deal with this, introduce some new functions, omap4_cminst* and omap4_prminst*. The former is to be used when writing to a CM instance register (no matter what subsystem or hardware module it exists in), and the latter, similarly, with PRM instance registers. To determine which "PRCM partition" to write to, the functions take a PRCM instance ID argument. Subsequent patches add these partition IDs to the OMAP4 powerdomain and clockdomain definitions. As far as I can see, there's really no good way to handle these types of register access inconsistencies. This patch seemed like the least bad approach. Moving forward, the long-term goal is to remove all direct PRCM register access from the PM code. PRCM register access should go through layers such as the powerdomain and clockdomain code that can hide the details of how to interact with the specific hardware variant. While here, rename cm4xxx.c to cm44xx.c to match the naming convention of the other OMAP4 PRCM files. Thanks to Santosh Shilimkar <santosh.shilimkar@ti.com>, Rajendra Nayak <rnayak@ti.com>, and Benoît Cousson <b-cousson@ti.com> for some comments. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoît Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
2010-12-22 12:05:14 +08:00
#include <linux/io.h>
ARM: OMAP: Split plat/hardware.h, use local soc.h for omap2+ As the plat and mach includes need to disappear for single zImage work, we need to remove plat/hardware.h. Do this by splitting plat/hardware.h into omap1 and omap2+ specific files. The old plat/hardware.h already has omap1 only defines, so it gets moved to mach/hardware.h for omap1. For omap2+, we use the local soc.h that for now just includes the related SoC headers to keep this patch more readable. Note that the local soc.h still includes plat/cpu.h that can be dealt with in later patches. Let's also include plat/serial.h from common.h for all the board-*.c files. This allows making the include files local later on without patching these files again. Note that only minimal changes are done in this patch for the drivers/watchdog/omap_wdt.c driver to keep things compiling. Further patches are needed to eventually remove cpu_is_omap usage in the drivers. Also only minimal changes are done to sound/soc/omap/* to remove the unneeded includes and to define OMAP44XX_MCPDM_L3_BASE locally so there's no need to include omap44xx.h. While at it, also sort some of the includes in the standard way. Cc: linux-watchdog@vger.kernel.org Cc: alsa-devel@alsa-project.org Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: Jarkko Nikula <jarkko.nikula@bitmer.com> Cc: Liam Girdwood <lrg@ti.com> Acked-by: Wim Van Sebroeck <wim@iguana.be> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-09-01 01:59:07 +08:00
#include "soc.h"
#include "iomap.h"
#include "common.h"
#include "vp.h"
#include "prm44xx.h"
#include "prm-regbits-44xx.h"
#include "prcm44xx.h"
#include "prminst44xx.h"
#include "powerdomain.h"
/* Static data */
static const struct omap_prcm_irq omap4_prcm_irqs[] = {
OMAP_PRCM_IRQ("wkup", 0, 0),
OMAP_PRCM_IRQ("io", 9, 1),
};
static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
.ack = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
.mask = OMAP4_PRM_IRQENABLE_MPU_OFFSET,
.nr_regs = 2,
.irqs = omap4_prcm_irqs,
.nr_irqs = ARRAY_SIZE(omap4_prcm_irqs),
.irq = 11 + OMAP44XX_IRQ_GIC_START,
.read_pending_irqs = &omap44xx_prm_read_pending_irqs,
.ocp_barrier = &omap44xx_prm_ocp_barrier,
.save_and_clear_irqen = &omap44xx_prm_save_and_clear_irqen,
.restore_irqen = &omap44xx_prm_restore_irqen,
.reconfigure_io_chain = &omap44xx_prm_reconfigure_io_chain,
};
/*
* omap44xx_prm_reset_src_map - map from bits in the PRM_RSTST
* hardware register (which are specific to OMAP44xx SoCs) to reset
* source ID bit shifts (which is an OMAP SoC-independent
* enumeration)
*/
static struct prm_reset_src_map omap44xx_prm_reset_src_map[] = {
{ OMAP4430_GLOBAL_WARM_SW_RST_SHIFT,
OMAP_GLOBAL_WARM_RST_SRC_ID_SHIFT },
{ OMAP4430_GLOBAL_COLD_RST_SHIFT,
OMAP_GLOBAL_COLD_RST_SRC_ID_SHIFT },
{ OMAP4430_MPU_SECURITY_VIOL_RST_SHIFT,
OMAP_SECU_VIOL_RST_SRC_ID_SHIFT },
{ OMAP4430_MPU_WDT_RST_SHIFT, OMAP_MPU_WD_RST_SRC_ID_SHIFT },
{ OMAP4430_SECURE_WDT_RST_SHIFT, OMAP_SECU_WD_RST_SRC_ID_SHIFT },
{ OMAP4430_EXTERNAL_WARM_RST_SHIFT, OMAP_EXTWARM_RST_SRC_ID_SHIFT },
{ OMAP4430_VDD_MPU_VOLT_MGR_RST_SHIFT,
OMAP_VDD_MPU_VM_RST_SRC_ID_SHIFT },
{ OMAP4430_VDD_IVA_VOLT_MGR_RST_SHIFT,
OMAP_VDD_IVA_VM_RST_SRC_ID_SHIFT },
{ OMAP4430_VDD_CORE_VOLT_MGR_RST_SHIFT,
OMAP_VDD_CORE_VM_RST_SRC_ID_SHIFT },
{ OMAP4430_ICEPICK_RST_SHIFT, OMAP_ICEPICK_RST_SRC_ID_SHIFT },
{ OMAP4430_C2C_RST_SHIFT, OMAP_C2C_RST_SRC_ID_SHIFT },
{ -1, -1 },
};
OMAP4: PRCM: add OMAP4-specific accessor/mutator functions In some ways, the OMAP4 PRCM register layout is quite different than the OMAP2/3 PRCM register layout. For example, on OMAP2/3, from a register layout point of view, all CM instances were located in the CM subsystem, and all PRM instances were located in the PRM subsystem. OMAP4 changes this. Now, for example, some CM instances, such as WKUP_CM and EMU_CM, are located in the system PRM subsystem. And a "local PRCM" exists for the MPU - this PRCM combines registers that would normally appear in both CM and PRM instances, but uses its own register layout which matches neither the OMAP2/3 PRCM layout nor the OMAP4 PRCM layout. To try to deal with this, introduce some new functions, omap4_cminst* and omap4_prminst*. The former is to be used when writing to a CM instance register (no matter what subsystem or hardware module it exists in), and the latter, similarly, with PRM instance registers. To determine which "PRCM partition" to write to, the functions take a PRCM instance ID argument. Subsequent patches add these partition IDs to the OMAP4 powerdomain and clockdomain definitions. As far as I can see, there's really no good way to handle these types of register access inconsistencies. This patch seemed like the least bad approach. Moving forward, the long-term goal is to remove all direct PRCM register access from the PM code. PRCM register access should go through layers such as the powerdomain and clockdomain code that can hide the details of how to interact with the specific hardware variant. While here, rename cm4xxx.c to cm44xx.c to match the naming convention of the other OMAP4 PRCM files. Thanks to Santosh Shilimkar <santosh.shilimkar@ti.com>, Rajendra Nayak <rnayak@ti.com>, and Benoît Cousson <b-cousson@ti.com> for some comments. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoît Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
2010-12-22 12:05:14 +08:00
/* PRM low-level functions */
/* Read a register in a CM/PRM instance in the PRM module */
u32 omap4_prm_read_inst_reg(s16 inst, u16 reg)
{
return readl_relaxed(prm_base + inst + reg);
OMAP4: PRCM: add OMAP4-specific accessor/mutator functions In some ways, the OMAP4 PRCM register layout is quite different than the OMAP2/3 PRCM register layout. For example, on OMAP2/3, from a register layout point of view, all CM instances were located in the CM subsystem, and all PRM instances were located in the PRM subsystem. OMAP4 changes this. Now, for example, some CM instances, such as WKUP_CM and EMU_CM, are located in the system PRM subsystem. And a "local PRCM" exists for the MPU - this PRCM combines registers that would normally appear in both CM and PRM instances, but uses its own register layout which matches neither the OMAP2/3 PRCM layout nor the OMAP4 PRCM layout. To try to deal with this, introduce some new functions, omap4_cminst* and omap4_prminst*. The former is to be used when writing to a CM instance register (no matter what subsystem or hardware module it exists in), and the latter, similarly, with PRM instance registers. To determine which "PRCM partition" to write to, the functions take a PRCM instance ID argument. Subsequent patches add these partition IDs to the OMAP4 powerdomain and clockdomain definitions. As far as I can see, there's really no good way to handle these types of register access inconsistencies. This patch seemed like the least bad approach. Moving forward, the long-term goal is to remove all direct PRCM register access from the PM code. PRCM register access should go through layers such as the powerdomain and clockdomain code that can hide the details of how to interact with the specific hardware variant. While here, rename cm4xxx.c to cm44xx.c to match the naming convention of the other OMAP4 PRCM files. Thanks to Santosh Shilimkar <santosh.shilimkar@ti.com>, Rajendra Nayak <rnayak@ti.com>, and Benoît Cousson <b-cousson@ti.com> for some comments. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoît Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
2010-12-22 12:05:14 +08:00
}
/* Write into a register in a CM/PRM instance in the PRM module */
void omap4_prm_write_inst_reg(u32 val, s16 inst, u16 reg)
{
writel_relaxed(val, prm_base + inst + reg);
OMAP4: PRCM: add OMAP4-specific accessor/mutator functions In some ways, the OMAP4 PRCM register layout is quite different than the OMAP2/3 PRCM register layout. For example, on OMAP2/3, from a register layout point of view, all CM instances were located in the CM subsystem, and all PRM instances were located in the PRM subsystem. OMAP4 changes this. Now, for example, some CM instances, such as WKUP_CM and EMU_CM, are located in the system PRM subsystem. And a "local PRCM" exists for the MPU - this PRCM combines registers that would normally appear in both CM and PRM instances, but uses its own register layout which matches neither the OMAP2/3 PRCM layout nor the OMAP4 PRCM layout. To try to deal with this, introduce some new functions, omap4_cminst* and omap4_prminst*. The former is to be used when writing to a CM instance register (no matter what subsystem or hardware module it exists in), and the latter, similarly, with PRM instance registers. To determine which "PRCM partition" to write to, the functions take a PRCM instance ID argument. Subsequent patches add these partition IDs to the OMAP4 powerdomain and clockdomain definitions. As far as I can see, there's really no good way to handle these types of register access inconsistencies. This patch seemed like the least bad approach. Moving forward, the long-term goal is to remove all direct PRCM register access from the PM code. PRCM register access should go through layers such as the powerdomain and clockdomain code that can hide the details of how to interact with the specific hardware variant. While here, rename cm4xxx.c to cm44xx.c to match the naming convention of the other OMAP4 PRCM files. Thanks to Santosh Shilimkar <santosh.shilimkar@ti.com>, Rajendra Nayak <rnayak@ti.com>, and Benoît Cousson <b-cousson@ti.com> for some comments. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoît Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
2010-12-22 12:05:14 +08:00
}
/* Read-modify-write a register in a PRM module. Caller must lock */
u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
{
u32 v;
v = omap4_prm_read_inst_reg(inst, reg);
v &= ~mask;
v |= bits;
omap4_prm_write_inst_reg(v, inst, reg);
return v;
}
/* PRM VP */
/*
* struct omap4_vp - OMAP4 VP register access description.
* @irqstatus_mpu: offset to IRQSTATUS_MPU register for VP
* @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg
*/
struct omap4_vp {
u32 irqstatus_mpu;
u32 tranxdone_status;
};
static struct omap4_vp omap4_vp[] = {
[OMAP4_VP_VDD_MPU_ID] = {
.irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
.tranxdone_status = OMAP4430_VP_MPU_TRANXDONE_ST_MASK,
},
[OMAP4_VP_VDD_IVA_ID] = {
.irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
.tranxdone_status = OMAP4430_VP_IVA_TRANXDONE_ST_MASK,
},
[OMAP4_VP_VDD_CORE_ID] = {
.irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
.tranxdone_status = OMAP4430_VP_CORE_TRANXDONE_ST_MASK,
},
};
u32 omap4_prm_vp_check_txdone(u8 vp_id)
{
struct omap4_vp *vp = &omap4_vp[vp_id];
u32 irqstatus;
irqstatus = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_OCP_SOCKET_INST,
vp->irqstatus_mpu);
return irqstatus & vp->tranxdone_status;
}
void omap4_prm_vp_clear_txdone(u8 vp_id)
{
struct omap4_vp *vp = &omap4_vp[vp_id];
omap4_prminst_write_inst_reg(vp->tranxdone_status,
OMAP4430_PRM_PARTITION,
OMAP4430_PRM_OCP_SOCKET_INST,
vp->irqstatus_mpu);
};
u32 omap4_prm_vcvp_read(u8 offset)
{
return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST, offset);
}
void omap4_prm_vcvp_write(u32 val, u8 offset)
{
omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST, offset);
}
u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
{
return omap4_prminst_rmw_inst_reg_bits(mask, bits,
OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
offset);
}
static inline u32 _read_pending_irq_reg(u16 irqen_offs, u16 irqst_offs)
{
u32 mask, st;
/* XXX read mask from RAM? */
mask = omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
irqen_offs);
st = omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST, irqst_offs);
return mask & st;
}
/**
* omap44xx_prm_read_pending_irqs - read pending PRM MPU IRQs into @events
* @events: ptr to two consecutive u32s, preallocated by caller
*
* Read PRM_IRQSTATUS_MPU* bits, AND'ed with the currently-enabled PRM
* MPU IRQs, and store the result into the two u32s pointed to by @events.
* No return value.
*/
void omap44xx_prm_read_pending_irqs(unsigned long *events)
{
events[0] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_OFFSET,
OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
events[1] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
}
/**
* omap44xx_prm_ocp_barrier - force buffered MPU writes to the PRM to complete
*
* Force any buffered writes to the PRM IP block to complete. Needed
* by the PRM IRQ handler, which reads and writes directly to the IP
* block, to avoid race conditions after acknowledging or clearing IRQ
* bits. No return value.
*/
void omap44xx_prm_ocp_barrier(void)
{
omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_REVISION_PRM_OFFSET);
}
/**
* omap44xx_prm_save_and_clear_irqen - save/clear PRM_IRQENABLE_MPU* regs
* @saved_mask: ptr to a u32 array to save IRQENABLE bits
*
* Save the PRM_IRQENABLE_MPU and PRM_IRQENABLE_MPU_2 registers to
* @saved_mask. @saved_mask must be allocated by the caller.
* Intended to be used in the PRM interrupt handler suspend callback.
* The OCP barrier is needed to ensure the write to disable PRM
* interrupts reaches the PRM before returning; otherwise, spurious
* interrupts might occur. No return value.
*/
void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
{
saved_mask[0] =
omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
saved_mask[1] =
omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQENABLE_MPU_OFFSET);
omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
/* OCP barrier */
omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_REVISION_PRM_OFFSET);
}
/**
* omap44xx_prm_restore_irqen - set PRM_IRQENABLE_MPU* registers from args
* @saved_mask: ptr to a u32 array of IRQENABLE bits saved previously
*
* Restore the PRM_IRQENABLE_MPU and PRM_IRQENABLE_MPU_2 registers from
* @saved_mask. Intended to be used in the PRM interrupt handler resume
* callback to restore values saved by omap44xx_prm_save_and_clear_irqen().
* No OCP barrier should be needed here; any pending PRM interrupts will fire
* once the writes reach the PRM. No return value.
*/
void omap44xx_prm_restore_irqen(u32 *saved_mask)
{
omap4_prm_write_inst_reg(saved_mask[0], OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQENABLE_MPU_OFFSET);
omap4_prm_write_inst_reg(saved_mask[1], OMAP4430_PRM_OCP_SOCKET_INST,
OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
}
/**
* omap44xx_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
*
* Clear any previously-latched I/O wakeup events and ensure that the
* I/O wakeup gates are aligned with the current mux settings. Works
* by asserting WUCLKIN, waiting for WUCLKOUT to be asserted, and then
* deasserting WUCLKIN and waiting for WUCLKOUT to be deasserted.
* No return value. XXX Are the final two steps necessary?
*/
void omap44xx_prm_reconfigure_io_chain(void)
{
int i = 0;
/* Trigger WUCLKIN enable */
omap4_prm_rmw_inst_reg_bits(OMAP4430_WUCLK_CTRL_MASK,
OMAP4430_WUCLK_CTRL_MASK,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_IO_PMCTRL_OFFSET);
omap_test_timeout(
(((omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_IO_PMCTRL_OFFSET) &
OMAP4430_WUCLK_STATUS_MASK) >>
OMAP4430_WUCLK_STATUS_SHIFT) == 1),
MAX_IOPAD_LATCH_TIME, i);
if (i == MAX_IOPAD_LATCH_TIME)
pr_warn("PRM: I/O chain clock line assertion timed out\n");
/* Trigger WUCLKIN disable */
omap4_prm_rmw_inst_reg_bits(OMAP4430_WUCLK_CTRL_MASK, 0x0,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_IO_PMCTRL_OFFSET);
omap_test_timeout(
(((omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_IO_PMCTRL_OFFSET) &
OMAP4430_WUCLK_STATUS_MASK) >>
OMAP4430_WUCLK_STATUS_SHIFT) == 0),
MAX_IOPAD_LATCH_TIME, i);
if (i == MAX_IOPAD_LATCH_TIME)
pr_warn("PRM: I/O chain clock line deassertion timed out\n");
return;
}
/**
* omap44xx_prm_enable_io_wakeup - enable wakeup events from I/O wakeup latches
*
* Activates the I/O wakeup event latches and allows events logged by
* those latches to signal a wakeup event to the PRCM. For I/O wakeups
* to occur, WAKEUPENABLE bits must be set in the pad mux registers, and
* omap44xx_prm_reconfigure_io_chain() must be called. No return value.
*/
static void __init omap44xx_prm_enable_io_wakeup(void)
{
omap4_prm_rmw_inst_reg_bits(OMAP4430_GLOBAL_WUEN_MASK,
OMAP4430_GLOBAL_WUEN_MASK,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_IO_PMCTRL_OFFSET);
}
/**
* omap44xx_prm_read_reset_sources - return the last SoC reset source
*
* Return a u32 representing the last reset sources of the SoC. The
* returned reset source bits are standardized across OMAP SoCs.
*/
static u32 omap44xx_prm_read_reset_sources(void)
{
struct prm_reset_src_map *p;
u32 r = 0;
u32 v;
v = omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
OMAP4_RM_RSTST);
p = omap44xx_prm_reset_src_map;
while (p->reg_shift >= 0 && p->std_shift >= 0) {
if (v & (1 << p->reg_shift))
r |= 1 << p->std_shift;
p++;
}
return r;
}
/**
* omap44xx_prm_was_any_context_lost_old - was module hardware context lost?
* @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION)
* @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST)
* @idx: CONTEXT register offset
*
* Return 1 if any bits were set in the *_CONTEXT_* register
* identified by (@part, @inst, @idx), which means that some context
* was lost for that module; otherwise, return 0.
*/
static bool omap44xx_prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx)
{
return (omap4_prminst_read_inst_reg(part, inst, idx)) ? 1 : 0;
}
/**
* omap44xx_prm_clear_context_lost_flags_old - clear context loss flags
* @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION)
* @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST)
* @idx: CONTEXT register offset
*
* Clear hardware context loss bits for the module identified by
* (@part, @inst, @idx). No return value. XXX Writes to reserved bits;
* is there a way to avoid this?
*/
static void omap44xx_prm_clear_context_loss_flags_old(u8 part, s16 inst,
u16 idx)
{
omap4_prminst_write_inst_reg(0xffffffff, part, inst, idx);
}
/* Powerdomain low-level functions */
static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
{
omap4_prminst_rmw_inst_reg_bits(OMAP_POWERSTATE_MASK,
(pwrst << OMAP_POWERSTATE_SHIFT),
pwrdm->prcm_partition,
pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
return 0;
}
static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= OMAP_POWERSTATE_MASK;
v >>= OMAP_POWERSTATE_SHIFT;
return v;
}
static int omap4_pwrdm_read_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTST);
v &= OMAP_POWERSTATEST_MASK;
v >>= OMAP_POWERSTATEST_SHIFT;
return v;
}
static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTST);
v &= OMAP4430_LASTPOWERSTATEENTERED_MASK;
v >>= OMAP4430_LASTPOWERSTATEENTERED_SHIFT;
return v;
}
static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
{
omap4_prminst_rmw_inst_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
(1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
pwrdm->prcm_partition,
pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
return 0;
}
static int omap4_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
{
omap4_prminst_rmw_inst_reg_bits(OMAP4430_LASTPOWERSTATEENTERED_MASK,
OMAP4430_LASTPOWERSTATEENTERED_MASK,
pwrdm->prcm_partition,
pwrdm->prcm_offs, OMAP4_PM_PWSTST);
return 0;
}
static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
{
u32 v;
v = pwrst << __ffs(OMAP4430_LOGICRETSTATE_MASK);
omap4_prminst_rmw_inst_reg_bits(OMAP4430_LOGICRETSTATE_MASK, v,
pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
return 0;
}
static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
u8 pwrst)
{
u32 m;
m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);
omap4_prminst_rmw_inst_reg_bits(m, (pwrst << __ffs(m)),
pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
return 0;
}
static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
u8 pwrst)
{
u32 m;
m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
omap4_prminst_rmw_inst_reg_bits(m, (pwrst << __ffs(m)),
pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
return 0;
}
static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTST);
v &= OMAP4430_LOGICSTATEST_MASK;
v >>= OMAP4430_LOGICSTATEST_SHIFT;
return v;
}
static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= OMAP4430_LOGICRETSTATE_MASK;
v >>= OMAP4430_LOGICRETSTATE_SHIFT;
return v;
}
/**
* omap4_pwrdm_read_prev_logic_pwrst - read the previous logic powerstate
* @pwrdm: struct powerdomain * to read the state for
*
* Reads the previous logic powerstate for a powerdomain. This
* function must determine the previous logic powerstate by first
* checking the previous powerstate for the domain. If that was OFF,
* then logic has been lost. If previous state was RETENTION, the
* function reads the setting for the next retention logic state to
* see the actual value. In every other case, the logic is
* retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
* depending whether the logic was retained or not.
*/
static int omap4_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
{
int state;
state = omap4_pwrdm_read_prev_pwrst(pwrdm);
if (state == PWRDM_POWER_OFF)
return PWRDM_POWER_OFF;
if (state != PWRDM_POWER_RET)
return PWRDM_POWER_RET;
return omap4_pwrdm_read_logic_retst(pwrdm);
}
static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
{
u32 m, v;
m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTST);
v &= m;
v >>= __ffs(m);
return v;
}
static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
{
u32 m, v;
m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= m;
v >>= __ffs(m);
return v;
}
/**
* omap4_pwrdm_read_prev_mem_pwrst - reads the previous memory powerstate
* @pwrdm: struct powerdomain * to read mem powerstate for
* @bank: memory bank index
*
* Reads the previous memory powerstate for a powerdomain. This
* function must determine the previous memory powerstate by first
* checking the previous powerstate for the domain. If that was OFF,
* then logic has been lost. If previous state was RETENTION, the
* function reads the setting for the next memory retention state to
* see the actual value. In every other case, the logic is
* retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
* depending whether logic was retained or not.
*/
static int omap4_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
{
int state;
state = omap4_pwrdm_read_prev_pwrst(pwrdm);
if (state == PWRDM_POWER_OFF)
return PWRDM_POWER_OFF;
if (state != PWRDM_POWER_RET)
return PWRDM_POWER_RET;
return omap4_pwrdm_read_mem_retst(pwrdm, bank);
}
static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
{
u32 c = 0;
/*
* REVISIT: pwrdm_wait_transition() may be better implemented
* via a callback and a periodic timer check -- how long do we expect
* powerdomain transitions to take?
*/
/* XXX Is this udelay() value meaningful? */
while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,
pwrdm->prcm_offs,
OMAP4_PM_PWSTST) &
OMAP_INTRANSITION_MASK) &&
(c++ < PWRDM_TRANSITION_BAILOUT))
udelay(1);
if (c > PWRDM_TRANSITION_BAILOUT) {
pr_err("powerdomain: %s: waited too long to complete transition\n",
pwrdm->name);
return -EAGAIN;
}
pr_debug("powerdomain: completed transition in %d loops\n", c);
return 0;
}
static int omap4_check_vcvp(void)
{
/* No VC/VP on dra7xx devices */
if (soc_is_dra7xx())
return 0;
return 1;
}
struct pwrdm_ops omap4_pwrdm_operations = {
.pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst,
.pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst,
.pwrdm_read_pwrst = omap4_pwrdm_read_pwrst,
.pwrdm_read_prev_pwrst = omap4_pwrdm_read_prev_pwrst,
.pwrdm_set_lowpwrstchange = omap4_pwrdm_set_lowpwrstchange,
.pwrdm_clear_all_prev_pwrst = omap4_pwrdm_clear_all_prev_pwrst,
.pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst,
.pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst,
.pwrdm_read_prev_logic_pwrst = omap4_pwrdm_read_prev_logic_pwrst,
.pwrdm_read_logic_retst = omap4_pwrdm_read_logic_retst,
.pwrdm_read_mem_pwrst = omap4_pwrdm_read_mem_pwrst,
.pwrdm_read_mem_retst = omap4_pwrdm_read_mem_retst,
.pwrdm_read_prev_mem_pwrst = omap4_pwrdm_read_prev_mem_pwrst,
.pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst,
.pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst,
.pwrdm_wait_transition = omap4_pwrdm_wait_transition,
.pwrdm_has_voltdm = omap4_check_vcvp,
};
static int omap44xx_prm_late_init(void);
/*
* XXX document
*/
static struct prm_ll_data omap44xx_prm_ll_data = {
.read_reset_sources = &omap44xx_prm_read_reset_sources,
.was_any_context_lost_old = &omap44xx_prm_was_any_context_lost_old,
.clear_context_loss_flags_old = &omap44xx_prm_clear_context_loss_flags_old,
.late_init = &omap44xx_prm_late_init,
};
int __init omap44xx_prm_init(void)
{
if (cpu_is_omap44xx())
prm_features |= PRM_HAS_IO_WAKEUP;
return prm_register(&omap44xx_prm_ll_data);
}
2014-05-17 06:26:22 +08:00
static int omap44xx_prm_late_init(void)
{
if (!(prm_features & PRM_HAS_IO_WAKEUP))
return 0;
omap44xx_prm_enable_io_wakeup();
return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);
}
static void __exit omap44xx_prm_exit(void)
{
prm_unregister(&omap44xx_prm_ll_data);
}
__exitcall(omap44xx_prm_exit);