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linux-next/include/linux/power/smartreflex.h
Andrii Tseglytskyi 299066bb37 PM / AVS: SmartReflex: use omap_sr * for enable/disable interface 
SmartReflex driver interface is natively divided to two parts:

- external SmartReflex interface
- interface between SmartReflex driver and SmartReflex Class

Functions which belong to AVS class interface can use
struct omap_sr* instead of struct voltatedomain*, to provide a
direct connection between SR driver and SR class. This allows
us to optimize and not do additional lookups where none is
required.

sr_enable() and sr_disable() are interface functions between
SR driver and SR class. They are typically used by Class driver
to enable/disable SmartReflex hardware module.
Now they take struct omap_sr* as input parameter.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-06-10 10:46:18 -07:00

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/*
* OMAP Smartreflex Defines and Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@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.
*/
#ifndef __POWER_SMARTREFLEX_H
#define __POWER_SMARTREFLEX_H
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/platform_data/voltage-omap.h>
/*
* Different Smartreflex IPs version. The v1 is the 65nm version used in
* OMAP3430. The v2 is the update for the 45nm version of the IP
* used in OMAP3630 and OMAP4430
*/
#define SR_TYPE_V1 1
#define SR_TYPE_V2 2
/* SMART REFLEX REG ADDRESS OFFSET */
#define SRCONFIG 0x00
#define SRSTATUS 0x04
#define SENVAL 0x08
#define SENMIN 0x0C
#define SENMAX 0x10
#define SENAVG 0x14
#define AVGWEIGHT 0x18
#define NVALUERECIPROCAL 0x1c
#define SENERROR_V1 0x20
#define ERRCONFIG_V1 0x24
#define IRQ_EOI 0x20
#define IRQSTATUS_RAW 0x24
#define IRQSTATUS 0x28
#define IRQENABLE_SET 0x2C
#define IRQENABLE_CLR 0x30
#define SENERROR_V2 0x34
#define ERRCONFIG_V2 0x38
/* Bit/Shift Positions */
/* SRCONFIG */
#define SRCONFIG_ACCUMDATA_SHIFT 22
#define SRCONFIG_SRCLKLENGTH_SHIFT 12
#define SRCONFIG_SENNENABLE_V1_SHIFT 5
#define SRCONFIG_SENPENABLE_V1_SHIFT 3
#define SRCONFIG_SENNENABLE_V2_SHIFT 1
#define SRCONFIG_SENPENABLE_V2_SHIFT 0
#define SRCONFIG_CLKCTRL_SHIFT 0
#define SRCONFIG_ACCUMDATA_MASK (0x3ff << 22)
#define SRCONFIG_SRENABLE BIT(11)
#define SRCONFIG_SENENABLE BIT(10)
#define SRCONFIG_ERRGEN_EN BIT(9)
#define SRCONFIG_MINMAXAVG_EN BIT(8)
#define SRCONFIG_DELAYCTRL BIT(2)
/* AVGWEIGHT */
#define AVGWEIGHT_SENPAVGWEIGHT_SHIFT 2
#define AVGWEIGHT_SENNAVGWEIGHT_SHIFT 0
/* NVALUERECIPROCAL */
#define NVALUERECIPROCAL_SENPGAIN_SHIFT 20
#define NVALUERECIPROCAL_SENNGAIN_SHIFT 16
#define NVALUERECIPROCAL_RNSENP_SHIFT 8
#define NVALUERECIPROCAL_RNSENN_SHIFT 0
/* ERRCONFIG */
#define ERRCONFIG_ERRWEIGHT_SHIFT 16
#define ERRCONFIG_ERRMAXLIMIT_SHIFT 8
#define ERRCONFIG_ERRMINLIMIT_SHIFT 0
#define SR_ERRWEIGHT_MASK (0x07 << 16)
#define SR_ERRMAXLIMIT_MASK (0xff << 8)
#define SR_ERRMINLIMIT_MASK (0xff << 0)
#define ERRCONFIG_VPBOUNDINTEN_V1 BIT(31)
#define ERRCONFIG_VPBOUNDINTST_V1 BIT(30)
#define ERRCONFIG_MCUACCUMINTEN BIT(29)
#define ERRCONFIG_MCUACCUMINTST BIT(28)
#define ERRCONFIG_MCUVALIDINTEN BIT(27)
#define ERRCONFIG_MCUVALIDINTST BIT(26)
#define ERRCONFIG_MCUBOUNDINTEN BIT(25)
#define ERRCONFIG_MCUBOUNDINTST BIT(24)
#define ERRCONFIG_MCUDISACKINTEN BIT(23)
#define ERRCONFIG_VPBOUNDINTST_V2 BIT(23)
#define ERRCONFIG_MCUDISACKINTST BIT(22)
#define ERRCONFIG_VPBOUNDINTEN_V2 BIT(22)
#define ERRCONFIG_STATUS_V1_MASK (ERRCONFIG_VPBOUNDINTST_V1 | \
ERRCONFIG_MCUACCUMINTST | \
ERRCONFIG_MCUVALIDINTST | \
ERRCONFIG_MCUBOUNDINTST | \
ERRCONFIG_MCUDISACKINTST)
/* IRQSTATUS */
#define IRQSTATUS_MCUACCUMINT BIT(3)
#define IRQSTATUS_MCVALIDINT BIT(2)
#define IRQSTATUS_MCBOUNDSINT BIT(1)
#define IRQSTATUS_MCUDISABLEACKINT BIT(0)
/* IRQENABLE_SET and IRQENABLE_CLEAR */
#define IRQENABLE_MCUACCUMINT BIT(3)
#define IRQENABLE_MCUVALIDINT BIT(2)
#define IRQENABLE_MCUBOUNDSINT BIT(1)
#define IRQENABLE_MCUDISABLEACKINT BIT(0)
/* Common Bit values */
#define SRCLKLENGTH_12MHZ_SYSCLK 0x3c
#define SRCLKLENGTH_13MHZ_SYSCLK 0x41
#define SRCLKLENGTH_19MHZ_SYSCLK 0x60
#define SRCLKLENGTH_26MHZ_SYSCLK 0x82
#define SRCLKLENGTH_38MHZ_SYSCLK 0xC0
/*
* 3430 specific values. Maybe these should be passed from board file or
* pmic structures.
*/
#define OMAP3430_SR_ACCUMDATA 0x1f4
#define OMAP3430_SR1_SENPAVGWEIGHT 0x03
#define OMAP3430_SR1_SENNAVGWEIGHT 0x03
#define OMAP3430_SR2_SENPAVGWEIGHT 0x01
#define OMAP3430_SR2_SENNAVGWEIGHT 0x01
#define OMAP3430_SR_ERRWEIGHT 0x04
#define OMAP3430_SR_ERRMAXLIMIT 0x02
struct omap_sr {
char *name;
struct list_head node;
struct platform_device *pdev;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
struct dentry *dbg_dir;
unsigned int irq;
int srid;
int ip_type;
int nvalue_count;
bool autocomp_active;
u32 clk_length;
u32 err_weight;
u32 err_minlimit;
u32 err_maxlimit;
u32 accum_data;
u32 senn_avgweight;
u32 senp_avgweight;
u32 senp_mod;
u32 senn_mod;
void __iomem *base;
};
/**
* test_cond_timeout - busy-loop, testing a condition
* @cond: condition to test until it evaluates to true
* @timeout: maximum number of microseconds in the timeout
* @index: loop index (integer)
*
* Loop waiting for @cond to become true or until at least @timeout
* microseconds have passed. To use, define some integer @index in the
* calling code. After running, if @index == @timeout, then the loop has
* timed out.
*
* Copied from omap_test_timeout */
#define sr_test_cond_timeout(cond, timeout, index) \
({ \
for (index = 0; index < timeout; index++) { \
if (cond) \
break; \
udelay(1); \
} \
})
/**
* struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
* pmic specific info to smartreflex driver
*
* @sr_pmic_init: API to initialize smartreflex on the PMIC side.
*/
struct omap_sr_pmic_data {
void (*sr_pmic_init) (void);
};
/**
* struct omap_smartreflex_dev_attr - Smartreflex Device attribute.
*
* @sensor_voltdm_name: Name of voltdomain of SR instance
*/
struct omap_smartreflex_dev_attr {
const char *sensor_voltdm_name;
};
#ifdef CONFIG_POWER_AVS_OMAP
/*
* The smart reflex driver supports CLASS1 CLASS2 and CLASS3 SR.
* The smartreflex class driver should pass the class type.
* Should be used to populate the class_type field of the
* omap_smartreflex_class_data structure.
*/
#define SR_CLASS1 0x1
#define SR_CLASS2 0x2
#define SR_CLASS3 0x3
/**
* struct omap_sr_class_data - Smartreflex class driver info
*
* @enable: API to enable a particular class smaartreflex.
* @disable: API to disable a particular class smartreflex.
* @configure: API to configure a particular class smartreflex.
* @notify: API to notify the class driver about an event in SR.
* Not needed for class3.
* @notify_flags: specify the events to be notified to the class driver
* @class_type: specify which smartreflex class.
* Can be used by the SR driver to take any class
* based decisions.
*/
struct omap_sr_class_data {
int (*enable)(struct omap_sr *sr);
int (*disable)(struct omap_sr *sr, int is_volt_reset);
int (*configure)(struct omap_sr *sr);
int (*notify)(struct omap_sr *sr, u32 status);
u8 notify_flags;
u8 class_type;
};
/**
* struct omap_sr_nvalue_table - Smartreflex n-target value info
*
* @efuse_offs: The offset of the efuse where n-target values are stored.
* @nvalue: The n-target value.
* @errminlimit: The value of the ERRMINLIMIT bitfield for this n-target
* @volt_nominal: microvolts DC that the VDD is initially programmed to
*/
struct omap_sr_nvalue_table {
u32 efuse_offs;
u32 nvalue;
u32 errminlimit;
unsigned long volt_nominal;
};
/**
* struct omap_sr_data - Smartreflex platform data.
*
* @name: instance name
* @ip_type: Smartreflex IP type.
* @senp_mod: SENPENABLE value of the sr CONFIG register
* @senn_mod: SENNENABLE value for sr CONFIG register
* @err_weight ERRWEIGHT value of the sr ERRCONFIG register
* @err_maxlimit ERRMAXLIMIT value of the sr ERRCONFIG register
* @accum_data ACCUMDATA value of the sr CONFIG register
* @senn_avgweight SENNAVGWEIGHT value of the sr AVGWEIGHT register
* @senp_avgweight SENPAVGWEIGHT value of the sr AVGWEIGHT register
* @nvalue_count: Number of distinct nvalues in the nvalue table
* @enable_on_init: whether this sr module needs to enabled at
* boot up or not.
* @nvalue_table: table containing the efuse offsets and nvalues
* corresponding to them.
* @voltdm: Pointer to the voltage domain associated with the SR
*/
struct omap_sr_data {
const char *name;
int ip_type;
u32 senp_mod;
u32 senn_mod;
u32 err_weight;
u32 err_maxlimit;
u32 accum_data;
u32 senn_avgweight;
u32 senp_avgweight;
int nvalue_count;
bool enable_on_init;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
};
/* Smartreflex module enable/disable interface */
void omap_sr_enable(struct voltagedomain *voltdm);
void omap_sr_disable(struct voltagedomain *voltdm);
void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
/* API to register the pmic specific data with the smartreflex driver. */
void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
/* Smartreflex driver hooks to be called from Smartreflex class driver */
int sr_enable(struct omap_sr *sr, unsigned long volt);
void sr_disable(struct omap_sr *sr);
int sr_configure_errgen(struct omap_sr *sr);
int sr_disable_errgen(struct omap_sr *sr);
int sr_configure_minmax(struct omap_sr *sr);
/* API to register the smartreflex class driver with the smartreflex driver */
int sr_register_class(struct omap_sr_class_data *class_data);
#else
static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable_reset_volt(
struct voltagedomain *voltdm) {}
static inline void omap_sr_register_pmic(
struct omap_sr_pmic_data *pmic_data) {}
#endif
#endif
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