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smartreflex.h
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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