diff options
Diffstat (limited to 'arch/arm/mach-omap2/vp.h')
| -rw-r--r-- | arch/arm/mach-omap2/vp.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/vp.h b/arch/arm/mach-omap2/vp.h new file mode 100644 index 00000000..7c155d24 --- /dev/null +++ b/arch/arm/mach-omap2/vp.h @@ -0,0 +1,128 @@ +/* + * OMAP3/4 Voltage Processor (VP) structure and macro definitions + * + * Copyright (C) 2007, 2010 Texas Instruments, Inc. + * Rajendra Nayak <rnayak@ti.com> + * Lesly A M <x0080970@ti.com> + * Thara Gopinath <thara@ti.com> + * + * Copyright (C) 2008, 2011 Nokia Corporation + * Kalle Jokiniemi + * 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. + */ +#ifndef __ARCH_ARM_MACH_OMAP2_VP_H +#define __ARCH_ARM_MACH_OMAP2_VP_H + +#include <linux/kernel.h> + +struct voltagedomain; + +/* + * Voltage Processor (VP) identifiers + */ +#define OMAP3_VP_VDD_MPU_ID 0 +#define OMAP3_VP_VDD_CORE_ID 1 +#define OMAP4_VP_VDD_CORE_ID 0 +#define OMAP4_VP_VDD_IVA_ID 1 +#define OMAP4_VP_VDD_MPU_ID 2 + +/* XXX document */ +#define VP_IDLE_TIMEOUT 200 +#define VP_TRANXDONE_TIMEOUT 300 + +/** + * struct omap_vp_ops - per-VP operations + * @check_txdone: check for VP transaction done + * @clear_txdone: clear VP transaction done status + */ +struct omap_vp_ops { + u32 (*check_txdone)(u8 vp_id); + void (*clear_txdone)(u8 vp_id); +}; + +/** + * struct omap_vp_common - register data common to all VDDs + * @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg + * @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg + * @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg + * @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg + * @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg + * @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg + * @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg + * @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg + * @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg + * @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg + * @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg + * @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg + */ +struct omap_vp_common { + u32 vpconfig_erroroffset_mask; + u32 vpconfig_errorgain_mask; + u32 vpconfig_initvoltage_mask; + u8 vpconfig_timeouten; + u8 vpconfig_initvdd; + u8 vpconfig_forceupdate; + u8 vpconfig_vpenable; + u8 vstepmin_stepmin_shift; + u8 vstepmin_smpswaittimemin_shift; + u8 vstepmax_stepmax_shift; + u8 vstepmax_smpswaittimemax_shift; + u8 vlimitto_vddmin_shift; + u8 vlimitto_vddmax_shift; + u8 vlimitto_timeout_shift; + u8 vpvoltage_mask; + + const struct omap_vp_ops *ops; +}; + +/** + * struct omap_vp_instance - VP register offsets (per-VDD) + * @common: pointer to struct omap_vp_common * for this SoC + * @vpconfig: PRM_VP*_CONFIG reg offset from PRM start + * @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start + * @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start + * @vstatus: PRM_VP*_VSTATUS reg offset from PRM start + * @voltage: PRM_VP*_VOLTAGE reg offset from PRM start + * @id: Unique identifier for VP instance. + * @enabled: flag to keep track of whether vp is enabled or not + * + * XXX vp_common is probably not needed since it is per-SoC + */ +struct omap_vp_instance { + const struct omap_vp_common *common; + u8 vpconfig; + u8 vstepmin; + u8 vstepmax; + u8 vlimitto; + u8 vstatus; + u8 voltage; + u8 id; + bool enabled; +}; + +extern struct omap_vp_instance omap3_vp_mpu; +extern struct omap_vp_instance omap3_vp_core; + +extern struct omap_vp_instance omap4_vp_mpu; +extern struct omap_vp_instance omap4_vp_iva; +extern struct omap_vp_instance omap4_vp_core; + +void omap_vp_init(struct voltagedomain *voltdm); +void omap_vp_enable(struct voltagedomain *voltdm); +void omap_vp_disable(struct voltagedomain *voltdm); +int omap_vp_forceupdate_scale(struct voltagedomain *voltdm, + unsigned long target_volt); +int omap_vp_update_errorgain(struct voltagedomain *voltdm, + unsigned long target_volt); + +#endif |