/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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 >
*/
#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 65 nm version used in
* OMAP3430 . The v2 is the update for the 45 nm 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 0 x00
#define SRSTATUS 0 x04
#define SENVAL 0 x08
#define SENMIN 0 x0C
#define SENMAX 0 x10
#define SENAVG 0 x14
#define AVGWEIGHT 0 x18
#define NVALUERECIPROCAL 0 x1c
#define SENERROR_V1 0 x20
#define ERRCONFIG_V1 0 x24
#define IRQ_EOI 0 x20
#define IRQSTATUS_RAW 0 x24
#define IRQSTATUS 0 x28
#define IRQENABLE_SET 0 x2C
#define IRQENABLE_CLR 0 x30
#define SENERROR_V2 0 x34
#define ERRCONFIG_V2 0 x38
/* 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 (0 x3ff << 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 (0 x07 << 16 )
#define SR_ERRMAXLIMIT_MASK (0 xff << 8 )
#define SR_ERRMINLIMIT_MASK (0 xff << 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 0 x3c
#define SRCLKLENGTH_13MHZ_SYSCLK 0 x41
#define SRCLKLENGTH_19MHZ_SYSCLK 0 x60
#define SRCLKLENGTH_26MHZ_SYSCLK 0 x82
#define SRCLKLENGTH_38MHZ_SYSCLK 0 xC0
/*
* 3430 specific values . Maybe these should be passed from board file or
* pmic structures .
*/
#define OMAP3430_SR_ACCUMDATA 0 x1f4
#define OMAP3430_SR1_SENPAVGWEIGHT 0 x03
#define OMAP3430_SR1_SENNAVGWEIGHT 0 x03
#define OMAP3430_SR2_SENPAVGWEIGHT 0 x01
#define OMAP3430_SR2_SENNAVGWEIGHT 0 x01
#define OMAP3430_SR_ERRWEIGHT 0 x04
#define OMAP3430_SR_ERRMAXLIMIT 0 x02
enum sr_instance {
OMAP_SR_MPU, /* shared with iva on omap3 */
OMAP_SR_CORE,
OMAP_SR_IVA,
OMAP_SR_NR,
};
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;
struct clk *fck;
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;
unsigned long enabled:1 ;
};
/**
* 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;
};
/*
* 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 0 x1
#define SR_CLASS2 0 x2
#define SR_CLASS3 0 x3
/**
* 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
* @ 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;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
};
extern struct omap_sr_data omap_sr_pdata[OMAP_SR_NR];
#ifdef CONFIG_POWER_AVS_OMAP
/* 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);
/* 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) {}
#endif
#endif
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