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linux/arch/arm/mach-omap2/omap_hwmod.h
Lokesh Vutla 461932dfb5 ARM: OMAP2+: hwmod: RTC: Add lock and unlock functions 
RTC IP have kicker feature which prevents spurious writes to its registers.
In order to write into any of the RTC registers, KICK values has to be
written to KICK registers. Also, RTC busy flag needs to be polled for
non-TC registers as well, without which update is not proper and confirmed
it by testing on DRA7-evm.
Introduce omap_hwmod_rtc_unlock/lock functions, which  writes into these
KICK registers inorder to lock and unlock RTC registers.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
[paul@pwsan.com: fixed subject line]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2016-04-10 13:20:10 -06:00

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/*
* omap_hwmod macros, structures
*
* Copyright (C) 2009-2011 Nokia Corporation
* Copyright (C) 2011-2012 Texas Instruments, Inc.
* Paul Walmsley
*
* Created in collaboration with (alphabetical order): Benoît Cousson,
* Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
* Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
*
* 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.
*
* These headers and macros are used to define OMAP on-chip module
* data and their integration with other OMAP modules and Linux.
* Copious documentation and references can also be found in the
* omap_hwmod code, in arch/arm/mach-omap2/omap_hwmod.c (as of this
* writing).
*
* To do:
* - add interconnect error log structures
* - add pinmuxing
* - init_conn_id_bit (CONNID_BIT_VECTOR)
* - implement default hwmod SMS/SDRC flags?
* - move Linux-specific data ("non-ROM data") out
*
*/
#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
struct omap_device;
extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1;
extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2;
extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type3;
/*
* OCP SYSCONFIG bit shifts/masks TYPE1. These are for IPs compliant
* with the original PRCM protocol defined for OMAP2420
*/
#define SYSC_TYPE1_MIDLEMODE_SHIFT 12
#define SYSC_TYPE1_MIDLEMODE_MASK (0x3 << SYSC_TYPE1_MIDLEMODE_SHIFT)
#define SYSC_TYPE1_CLOCKACTIVITY_SHIFT 8
#define SYSC_TYPE1_CLOCKACTIVITY_MASK (0x3 << SYSC_TYPE1_CLOCKACTIVITY_SHIFT)
#define SYSC_TYPE1_SIDLEMODE_SHIFT 3
#define SYSC_TYPE1_SIDLEMODE_MASK (0x3 << SYSC_TYPE1_SIDLEMODE_SHIFT)
#define SYSC_TYPE1_ENAWAKEUP_SHIFT 2
#define SYSC_TYPE1_ENAWAKEUP_MASK (1 << SYSC_TYPE1_ENAWAKEUP_SHIFT)
#define SYSC_TYPE1_SOFTRESET_SHIFT 1
#define SYSC_TYPE1_SOFTRESET_MASK (1 << SYSC_TYPE1_SOFTRESET_SHIFT)
#define SYSC_TYPE1_AUTOIDLE_SHIFT 0
#define SYSC_TYPE1_AUTOIDLE_MASK (1 << SYSC_TYPE1_AUTOIDLE_SHIFT)
/*
* OCP SYSCONFIG bit shifts/masks TYPE2. These are for IPs compliant
* with the new PRCM protocol defined for new OMAP4 IPs.
*/
#define SYSC_TYPE2_SOFTRESET_SHIFT 0
#define SYSC_TYPE2_SOFTRESET_MASK (1 << SYSC_TYPE2_SOFTRESET_SHIFT)
#define SYSC_TYPE2_SIDLEMODE_SHIFT 2
#define SYSC_TYPE2_SIDLEMODE_MASK (0x3 << SYSC_TYPE2_SIDLEMODE_SHIFT)
#define SYSC_TYPE2_MIDLEMODE_SHIFT 4
#define SYSC_TYPE2_MIDLEMODE_MASK (0x3 << SYSC_TYPE2_MIDLEMODE_SHIFT)
#define SYSC_TYPE2_DMADISABLE_SHIFT 16
#define SYSC_TYPE2_DMADISABLE_MASK (0x1 << SYSC_TYPE2_DMADISABLE_SHIFT)
/*
* OCP SYSCONFIG bit shifts/masks TYPE3.
* This is applicable for some IPs present in AM33XX
*/
#define SYSC_TYPE3_SIDLEMODE_SHIFT 0
#define SYSC_TYPE3_SIDLEMODE_MASK (0x3 << SYSC_TYPE3_SIDLEMODE_SHIFT)
#define SYSC_TYPE3_MIDLEMODE_SHIFT 2
#define SYSC_TYPE3_MIDLEMODE_MASK (0x3 << SYSC_TYPE3_MIDLEMODE_SHIFT)
/* OCP SYSSTATUS bit shifts/masks */
#define SYSS_RESETDONE_SHIFT 0
#define SYSS_RESETDONE_MASK (1 << SYSS_RESETDONE_SHIFT)
/* Master standby/slave idle mode flags */
#define HWMOD_IDLEMODE_FORCE (1 << 0)
#define HWMOD_IDLEMODE_NO (1 << 1)
#define HWMOD_IDLEMODE_SMART (1 << 2)
#define HWMOD_IDLEMODE_SMART_WKUP (1 << 3)
/* modulemode control type (SW or HW) */
#define MODULEMODE_HWCTRL 1
#define MODULEMODE_SWCTRL 2
#define DEBUG_OMAP2UART1_FLAGS 0
#define DEBUG_OMAP2UART2_FLAGS 0
#define DEBUG_OMAP2UART3_FLAGS 0
#define DEBUG_OMAP3UART3_FLAGS 0
#define DEBUG_OMAP3UART4_FLAGS 0
#define DEBUG_OMAP4UART3_FLAGS 0
#define DEBUG_OMAP4UART4_FLAGS 0
#define DEBUG_TI81XXUART1_FLAGS 0
#define DEBUG_TI81XXUART2_FLAGS 0
#define DEBUG_TI81XXUART3_FLAGS 0
#define DEBUG_AM33XXUART1_FLAGS 0
#define DEBUG_OMAPUART_FLAGS (HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET)
#ifdef CONFIG_OMAP_GPMC_DEBUG
#define DEBUG_OMAP_GPMC_HWMOD_FLAGS HWMOD_INIT_NO_RESET
#else
#define DEBUG_OMAP_GPMC_HWMOD_FLAGS 0
#endif
#if defined(CONFIG_DEBUG_OMAP2UART1)
#undef DEBUG_OMAP2UART1_FLAGS
#define DEBUG_OMAP2UART1_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP2UART2)
#undef DEBUG_OMAP2UART2_FLAGS
#define DEBUG_OMAP2UART2_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP2UART3)
#undef DEBUG_OMAP2UART3_FLAGS
#define DEBUG_OMAP2UART3_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP3UART3)
#undef DEBUG_OMAP3UART3_FLAGS
#define DEBUG_OMAP3UART3_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP3UART4)
#undef DEBUG_OMAP3UART4_FLAGS
#define DEBUG_OMAP3UART4_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP4UART3)
#undef DEBUG_OMAP4UART3_FLAGS
#define DEBUG_OMAP4UART3_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_OMAP4UART4)
#undef DEBUG_OMAP4UART4_FLAGS
#define DEBUG_OMAP4UART4_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_TI81XXUART1)
#undef DEBUG_TI81XXUART1_FLAGS
#define DEBUG_TI81XXUART1_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_TI81XXUART2)
#undef DEBUG_TI81XXUART2_FLAGS
#define DEBUG_TI81XXUART2_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_TI81XXUART3)
#undef DEBUG_TI81XXUART3_FLAGS
#define DEBUG_TI81XXUART3_FLAGS DEBUG_OMAPUART_FLAGS
#elif defined(CONFIG_DEBUG_AM33XXUART1)
#undef DEBUG_AM33XXUART1_FLAGS
#define DEBUG_AM33XXUART1_FLAGS DEBUG_OMAPUART_FLAGS
#endif
/**
* struct omap_hwmod_mux_info - hwmod specific mux configuration
* @pads: array of omap_device_pad entries
* @nr_pads: number of omap_device_pad entries
*
* Note that this is currently built during init as needed.
*/
struct omap_hwmod_mux_info {
int nr_pads;
struct omap_device_pad *pads;
int nr_pads_dynamic;
struct omap_device_pad **pads_dynamic;
int *irqs;
bool enabled;
};
/**
* struct omap_hwmod_irq_info - MPU IRQs used by the hwmod
* @name: name of the IRQ channel (module local name)
* @irq: IRQ channel ID (should be non-negative except -1 = terminator)
*
* @name should be something short, e.g., "tx" or "rx". It is for use
* by platform_get_resource_byname(). It is defined locally to the
* hwmod.
*/
struct omap_hwmod_irq_info {
const char *name;
s16 irq;
};
/**
* struct omap_hwmod_dma_info - DMA channels used by the hwmod
* @name: name of the DMA channel (module local name)
* @dma_req: DMA request ID (should be non-negative except -1 = terminator)
*
* @name should be something short, e.g., "tx" or "rx". It is for use
* by platform_get_resource_byname(). It is defined locally to the
* hwmod.
*/
struct omap_hwmod_dma_info {
const char *name;
s16 dma_req;
};
/**
* struct omap_hwmod_rst_info - IPs reset lines use by hwmod
* @name: name of the reset line (module local name)
* @rst_shift: Offset of the reset bit
* @st_shift: Offset of the reset status bit (OMAP2/3 only)
*
* @name should be something short, e.g., "cpu0" or "rst". It is defined
* locally to the hwmod.
*/
struct omap_hwmod_rst_info {
const char *name;
u8 rst_shift;
u8 st_shift;
};
/**
* struct omap_hwmod_opt_clk - optional clocks used by this hwmod
* @role: "sys", "32k", "tv", etc -- for use in clk_get()
* @clk: opt clock: OMAP clock name
* @_clk: pointer to the struct clk (filled in at runtime)
*
* The module's interface clock and main functional clock should not
* be added as optional clocks.
*/
struct omap_hwmod_opt_clk {
const char *role;
const char *clk;
struct clk *_clk;
};
/* omap_hwmod_omap2_firewall.flags bits */
#define OMAP_FIREWALL_L3 (1 << 0)
#define OMAP_FIREWALL_L4 (1 << 1)
/**
* struct omap_hwmod_omap2_firewall - OMAP2/3 device firewall data
* @l3_perm_bit: bit shift for L3_PM_*_PERMISSION_*
* @l4_fw_region: L4 firewall region ID
* @l4_prot_group: L4 protection group ID
* @flags: (see omap_hwmod_omap2_firewall.flags macros above)
*/
struct omap_hwmod_omap2_firewall {
u8 l3_perm_bit;
u8 l4_fw_region;
u8 l4_prot_group;
u8 flags;
};
/*
* omap_hwmod_addr_space.flags bits
*
* ADDR_MAP_ON_INIT: Map this address space during omap_hwmod init.
* ADDR_TYPE_RT: Address space contains module register target data.
*/
#define ADDR_MAP_ON_INIT (1 << 0) /* XXX does not belong */
#define ADDR_TYPE_RT (1 << 1)
/**
* struct omap_hwmod_addr_space - address space handled by the hwmod
* @name: name of the address space
* @pa_start: starting physical address
* @pa_end: ending physical address
* @flags: (see omap_hwmod_addr_space.flags macros above)
*
* Address space doesn't necessarily follow physical interconnect
* structure. GPMC is one example.
*/
struct omap_hwmod_addr_space {
const char *name;
u32 pa_start;
u32 pa_end;
u8 flags;
};
/*
* omap_hwmod_ocp_if.user bits: these indicate the initiators that use this
* interface to interact with the hwmod. Used to add sleep dependencies
* when the module is enabled or disabled.
*/
#define OCP_USER_MPU (1 << 0)
#define OCP_USER_SDMA (1 << 1)
#define OCP_USER_DSP (1 << 2)
#define OCP_USER_IVA (1 << 3)
/* omap_hwmod_ocp_if.flags bits */
#define OCPIF_SWSUP_IDLE (1 << 0)
#define OCPIF_CAN_BURST (1 << 1)
/* omap_hwmod_ocp_if._int_flags possibilities */
#define _OCPIF_INT_FLAGS_REGISTERED (1 << 0)
/**
* struct omap_hwmod_ocp_if - OCP interface data
* @master: struct omap_hwmod that initiates OCP transactions on this link
* @slave: struct omap_hwmod that responds to OCP transactions on this link
* @addr: address space associated with this link
* @clk: interface clock: OMAP clock name
* @_clk: pointer to the interface struct clk (filled in at runtime)
* @fw: interface firewall data
* @width: OCP data width
* @user: initiators using this interface (see OCP_USER_* macros above)
* @flags: OCP interface flags (see OCPIF_* macros above)
* @_int_flags: internal flags (see _OCPIF_INT_FLAGS* macros above)
*
* It may also be useful to add a tag_cnt field for OCP2.x devices.
*
* Parameter names beginning with an underscore are managed internally by
* the omap_hwmod code and should not be set during initialization.
*/
struct omap_hwmod_ocp_if {
struct omap_hwmod *master;
struct omap_hwmod *slave;
struct omap_hwmod_addr_space *addr;
const char *clk;
struct clk *_clk;
union {
struct omap_hwmod_omap2_firewall omap2;
} fw;
u8 width;
u8 user;
u8 flags;
u8 _int_flags;
};
/* Macros for use in struct omap_hwmod_sysconfig */
/* Flags for use in omap_hwmod_sysconfig.idlemodes */
#define MASTER_STANDBY_SHIFT 4
#define SLAVE_IDLE_SHIFT 0
#define SIDLE_FORCE (HWMOD_IDLEMODE_FORCE << SLAVE_IDLE_SHIFT)
#define SIDLE_NO (HWMOD_IDLEMODE_NO << SLAVE_IDLE_SHIFT)
#define SIDLE_SMART (HWMOD_IDLEMODE_SMART << SLAVE_IDLE_SHIFT)
#define SIDLE_SMART_WKUP (HWMOD_IDLEMODE_SMART_WKUP << SLAVE_IDLE_SHIFT)
#define MSTANDBY_FORCE (HWMOD_IDLEMODE_FORCE << MASTER_STANDBY_SHIFT)
#define MSTANDBY_NO (HWMOD_IDLEMODE_NO << MASTER_STANDBY_SHIFT)
#define MSTANDBY_SMART (HWMOD_IDLEMODE_SMART << MASTER_STANDBY_SHIFT)
#define MSTANDBY_SMART_WKUP (HWMOD_IDLEMODE_SMART_WKUP << MASTER_STANDBY_SHIFT)
/* omap_hwmod_sysconfig.sysc_flags capability flags */
#define SYSC_HAS_AUTOIDLE (1 << 0)
#define SYSC_HAS_SOFTRESET (1 << 1)
#define SYSC_HAS_ENAWAKEUP (1 << 2)
#define SYSC_HAS_EMUFREE (1 << 3)
#define SYSC_HAS_CLOCKACTIVITY (1 << 4)
#define SYSC_HAS_SIDLEMODE (1 << 5)
#define SYSC_HAS_MIDLEMODE (1 << 6)
#define SYSS_HAS_RESET_STATUS (1 << 7)
#define SYSC_NO_CACHE (1 << 8) /* XXX SW flag, belongs elsewhere */
#define SYSC_HAS_RESET_STATUS (1 << 9)
#define SYSC_HAS_DMADISABLE (1 << 10)
/* omap_hwmod_sysconfig.clockact flags */
#define CLOCKACT_TEST_BOTH 0x0
#define CLOCKACT_TEST_MAIN 0x1
#define CLOCKACT_TEST_ICLK 0x2
#define CLOCKACT_TEST_NONE 0x3
/**
* struct omap_hwmod_sysc_fields - hwmod OCP_SYSCONFIG register field offsets.
* @midle_shift: Offset of the midle bit
* @clkact_shift: Offset of the clockactivity bit
* @sidle_shift: Offset of the sidle bit
* @enwkup_shift: Offset of the enawakeup bit
* @srst_shift: Offset of the softreset bit
* @autoidle_shift: Offset of the autoidle bit
* @dmadisable_shift: Offset of the dmadisable bit
*/
struct omap_hwmod_sysc_fields {
u8 midle_shift;
u8 clkact_shift;
u8 sidle_shift;
u8 enwkup_shift;
u8 srst_shift;
u8 autoidle_shift;
u8 dmadisable_shift;
};
/**
* struct omap_hwmod_class_sysconfig - hwmod class OCP_SYS* data
* @rev_offs: IP block revision register offset (from module base addr)
* @sysc_offs: OCP_SYSCONFIG register offset (from module base addr)
* @syss_offs: OCP_SYSSTATUS register offset (from module base addr)
* @srst_udelay: Delay needed after doing a softreset in usecs
* @idlemodes: One or more of {SIDLE,MSTANDBY}_{OFF,FORCE,SMART}
* @sysc_flags: SYS{C,S}_HAS* flags indicating SYSCONFIG bits supported
* @clockact: the default value of the module CLOCKACTIVITY bits
*
* @clockact describes to the module which clocks are likely to be
* disabled when the PRCM issues its idle request to the module. Some
* modules have separate clockdomains for the interface clock and main
* functional clock, and can check whether they should acknowledge the
* idle request based on the internal module functionality that has
* been associated with the clocks marked in @clockact. This field is
* only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below)
*
* @sysc_fields: structure containing the offset positions of various bits in
* SYSCONFIG register. This can be populated using omap_hwmod_sysc_type1 or
* omap_hwmod_sysc_type2 defined in omap_hwmod_common_data.c depending on
* whether the device ip is compliant with the original PRCM protocol
* defined for OMAP2420 or the new PRCM protocol for new OMAP4 IPs.
* If the device follows a different scheme for the sysconfig register ,
* then this field has to be populated with the correct offset structure.
*/
struct omap_hwmod_class_sysconfig {
u32 rev_offs;
u32 sysc_offs;
u32 syss_offs;
u16 sysc_flags;
struct omap_hwmod_sysc_fields *sysc_fields;
u8 srst_udelay;
u8 idlemodes;
u8 clockact;
};
/**
* struct omap_hwmod_omap2_prcm - OMAP2/3-specific PRCM data
* @module_offs: PRCM submodule offset from the start of the PRM/CM
* @prcm_reg_id: PRCM register ID (e.g., 3 for CM_AUTOIDLE3)
* @module_bit: register bit shift for AUTOIDLE, WKST, WKEN, GRPSEL regs
* @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3)
* @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit
* @idlest_stdby_bit: register bit shift for CM_IDLEST master standby bit
*
* @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST,
* WKEN, GRPSEL registers. In an ideal world, no extra information
* would be needed for IDLEST information, but alas, there are some
* exceptions, so @idlest_reg_id, @idlest_idle_bit, @idlest_stdby_bit
* are needed for the IDLEST registers (c.f. 2430 I2CHS, 3430 USBHOST)
*/
struct omap_hwmod_omap2_prcm {
s16 module_offs;
u8 prcm_reg_id;
u8 module_bit;
u8 idlest_reg_id;
u8 idlest_idle_bit;
u8 idlest_stdby_bit;
};
/*
* Possible values for struct omap_hwmod_omap4_prcm.flags
*
* HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT: Some IP blocks don't have a PRCM
* module-level context loss register associated with them; this
* flag bit should be set in those cases
*/
#define HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT (1 << 0)
/**
* struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data
* @clkctrl_offs: offset of the PRCM clock control register
* @rstctrl_offs: offset of the XXX_RSTCTRL register located in the PRM
* @context_offs: offset of the RM_*_CONTEXT register
* @lostcontext_mask: bitmask for selecting bits from RM_*_CONTEXT register
* @rstst_reg: (AM33XX only) address of the XXX_RSTST register in the PRM
* @submodule_wkdep_bit: bit shift of the WKDEP range
* @flags: PRCM register capabilities for this IP block
* @modulemode: allowable modulemodes
* @context_lost_counter: Count of module level context lost
*
* If @lostcontext_mask is not defined, context loss check code uses
* whole register without masking. @lostcontext_mask should only be
* defined in cases where @context_offs register is shared by two or
* more hwmods.
*/
struct omap_hwmod_omap4_prcm {
u16 clkctrl_offs;
u16 rstctrl_offs;
u16 rstst_offs;
u16 context_offs;
u32 lostcontext_mask;
u8 submodule_wkdep_bit;
u8 modulemode;
u8 flags;
int context_lost_counter;
};
/*
* omap_hwmod.flags definitions
*
* HWMOD_SWSUP_SIDLE: omap_hwmod code should manually bring module in and out
* of idle, rather than relying on module smart-idle
* HWMOD_SWSUP_MSTANDBY: omap_hwmod code should manually bring module in and
* out of standby, rather than relying on module smart-standby
* HWMOD_INIT_NO_RESET: don't reset this module at boot - important for
* SDRAM controller, etc. XXX probably belongs outside the main hwmod file
* XXX Should be HWMOD_SETUP_NO_RESET
* HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM
* controller, etc. XXX probably belongs outside the main hwmod file
* XXX Should be HWMOD_SETUP_NO_IDLE
* HWMOD_NO_OCP_AUTOIDLE: disable module autoidle (OCP_SYSCONFIG.AUTOIDLE)
* when module is enabled, rather than the default, which is to
* enable autoidle
* HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup
* HWMOD_NO_IDLEST: this module does not have idle status - this is the case
* only for few initiator modules on OMAP2 & 3.
* HWMOD_CONTROL_OPT_CLKS_IN_RESET: Enable all optional clocks during reset.
* This is needed for devices like DSS that require optional clocks enabled
* in order to complete the reset. Optional clocks will be disabled
* again after the reset.
* HWMOD_16BIT_REG: Module has 16bit registers
* HWMOD_EXT_OPT_MAIN_CLK: The only main functional clock source for
* this IP block comes from an off-chip source and is not always
* enabled. This prevents the hwmod code from being able to
* enable and reset the IP block early. XXX Eventually it should
* be possible to query the clock framework for this information.
* HWMOD_BLOCK_WFI: Some OMAP peripherals apparently don't work
* correctly if the MPU is allowed to go idle while the
* peripherals are active. This is apparently true for the I2C on
* OMAP2420, and also the EMAC on AM3517/3505. It's unlikely that
* this is really true -- we're probably not configuring something
* correctly, or this is being abused to deal with some PM latency
* issues -- but we're currently suffering from a shortage of
* folks who are able to track these issues down properly.
* HWMOD_FORCE_MSTANDBY: Always keep MIDLEMODE bits cleared so that device
* is kept in force-standby mode. Failing to do so causes PM problems
* with musb on OMAP3630 at least. Note that musb has a dedicated register
* to control MSTANDBY signal when MIDLEMODE is set to force-standby.
* HWMOD_SWSUP_SIDLE_ACT: omap_hwmod code should manually bring the module
* out of idle, but rely on smart-idle to the put it back in idle,
* so the wakeups are still functional (Only known case for now is UART)
* HWMOD_RECONFIG_IO_CHAIN: omap_hwmod code needs to reconfigure wake-up
* events by calling _reconfigure_io_chain() when a device is enabled
* or idled.
* HWMOD_OPT_CLKS_NEEDED: The optional clocks are needed for the module to
* operate and they need to be handled at the same time as the main_clk.
* HWMOD_NO_IDLE: Do not idle the hwmod at all. Useful to handle certain
* IPs like CPSW on DRA7, where clocks to this module cannot be disabled.
*/
#define HWMOD_SWSUP_SIDLE (1 << 0)
#define HWMOD_SWSUP_MSTANDBY (1 << 1)
#define HWMOD_INIT_NO_RESET (1 << 2)
#define HWMOD_INIT_NO_IDLE (1 << 3)
#define HWMOD_NO_OCP_AUTOIDLE (1 << 4)
#define HWMOD_SET_DEFAULT_CLOCKACT (1 << 5)
#define HWMOD_NO_IDLEST (1 << 6)
#define HWMOD_CONTROL_OPT_CLKS_IN_RESET (1 << 7)
#define HWMOD_16BIT_REG (1 << 8)
#define HWMOD_EXT_OPT_MAIN_CLK (1 << 9)
#define HWMOD_BLOCK_WFI (1 << 10)
#define HWMOD_FORCE_MSTANDBY (1 << 11)
#define HWMOD_SWSUP_SIDLE_ACT (1 << 12)
#define HWMOD_RECONFIG_IO_CHAIN (1 << 13)
#define HWMOD_OPT_CLKS_NEEDED (1 << 14)
#define HWMOD_NO_IDLE (1 << 15)
/*
* omap_hwmod._int_flags definitions
* These are for internal use only and are managed by the omap_hwmod code.
*
* _HWMOD_NO_MPU_PORT: no path exists for the MPU to write to this module
* _HWMOD_SYSCONFIG_LOADED: set when the OCP_SYSCONFIG value has been cached
* _HWMOD_SKIP_ENABLE: set if hwmod enabled during init (HWMOD_INIT_NO_IDLE) -
* causes the first call to _enable() to only update the pinmux
*/
#define _HWMOD_NO_MPU_PORT (1 << 0)
#define _HWMOD_SYSCONFIG_LOADED (1 << 1)
#define _HWMOD_SKIP_ENABLE (1 << 2)
/*
* omap_hwmod._state definitions
*
* INITIALIZED: reset (optionally), initialized, enabled, disabled
* (optionally)
*
*
*/
#define _HWMOD_STATE_UNKNOWN 0
#define _HWMOD_STATE_REGISTERED 1
#define _HWMOD_STATE_CLKS_INITED 2
#define _HWMOD_STATE_INITIALIZED 3
#define _HWMOD_STATE_ENABLED 4
#define _HWMOD_STATE_IDLE 5
#define _HWMOD_STATE_DISABLED 6
/**
* struct omap_hwmod_class - the type of an IP block
* @name: name of the hwmod_class
* @sysc: device SYSCONFIG/SYSSTATUS register data
* @rev: revision of the IP class
* @pre_shutdown: ptr to fn to be executed immediately prior to device shutdown
* @reset: ptr to fn to be executed in place of the standard hwmod reset fn
* @enable_preprogram: ptr to fn to be executed during device enable
* @lock: ptr to fn to be executed to lock IP registers
* @unlock: ptr to fn to be executed to unlock IP registers
*
* Represent the class of a OMAP hardware "modules" (e.g. timer,
* smartreflex, gpio, uart...)
*
* @pre_shutdown is a function that will be run immediately before
* hwmod clocks are disabled, etc. It is intended for use for hwmods
* like the MPU watchdog, which cannot be disabled with the standard
* omap_hwmod_shutdown(). The function should return 0 upon success,
* or some negative error upon failure. Returning an error will cause
* omap_hwmod_shutdown() to abort the device shutdown and return an
* error.
*
* If @reset is defined, then the function it points to will be
* executed in place of the standard hwmod _reset() code in
* mach-omap2/omap_hwmod.c. This is needed for IP blocks which have
* unusual reset sequences - usually processor IP blocks like the IVA.
*/
struct omap_hwmod_class {
const char *name;
struct omap_hwmod_class_sysconfig *sysc;
u32 rev;
int (*pre_shutdown)(struct omap_hwmod *oh);
int (*reset)(struct omap_hwmod *oh);
int (*enable_preprogram)(struct omap_hwmod *oh);
void (*lock)(struct omap_hwmod *oh);
void (*unlock)(struct omap_hwmod *oh);
};
/**
* struct omap_hwmod_link - internal structure linking hwmods with ocp_ifs
* @ocp_if: OCP interface structure record pointer
* @node: list_head pointing to next struct omap_hwmod_link in a list
*/
struct omap_hwmod_link {
struct omap_hwmod_ocp_if *ocp_if;
struct list_head node;
};
/**
* struct omap_hwmod - integration data for OMAP hardware "modules" (IP blocks)
* @name: name of the hwmod
* @class: struct omap_hwmod_class * to the class of this hwmod
* @od: struct omap_device currently associated with this hwmod (internal use)
* @mpu_irqs: ptr to an array of MPU IRQs
* @sdma_reqs: ptr to an array of System DMA request IDs
* @prcm: PRCM data pertaining to this hwmod
* @main_clk: main clock: OMAP clock name
* @_clk: pointer to the main struct clk (filled in at runtime)
* @opt_clks: other device clocks that drivers can request (0..*)
* @voltdm: pointer to voltage domain (filled in at runtime)
* @dev_attr: arbitrary device attributes that can be passed to the driver
* @_sysc_cache: internal-use hwmod flags
* @mpu_rt_idx: index of device address space for register target (for DT boot)
* @_mpu_rt_va: cached register target start address (internal use)
* @_mpu_port: cached MPU register target slave (internal use)
* @opt_clks_cnt: number of @opt_clks
* @master_cnt: number of @master entries
* @slaves_cnt: number of @slave entries
* @response_lat: device OCP response latency (in interface clock cycles)
* @_int_flags: internal-use hwmod flags
* @_state: internal-use hwmod state
* @_postsetup_state: internal-use state to leave the hwmod in after _setup()
* @flags: hwmod flags (documented below)
* @_lock: spinlock serializing operations on this hwmod
* @node: list node for hwmod list (internal use)
* @parent_hwmod: (temporary) a pointer to the hierarchical parent of this hwmod
*
* @main_clk refers to this module's "main clock," which for our
* purposes is defined as "the functional clock needed for register
* accesses to complete." Modules may not have a main clock if the
* interface clock also serves as a main clock.
*
* Parameter names beginning with an underscore are managed internally by
* the omap_hwmod code and should not be set during initialization.
*
* @masters and @slaves are now deprecated.
*
* @parent_hwmod is temporary; there should be no need for it, as this
* information should already be expressed in the OCP interface
* structures. @parent_hwmod is present as a workaround until we improve
* handling for hwmods with multiple parents (e.g., OMAP4+ DSS with
* multiple register targets across different interconnects).
*/
struct omap_hwmod {
const char *name;
struct omap_hwmod_class *class;
struct omap_device *od;
struct omap_hwmod_mux_info *mux;
struct omap_hwmod_irq_info *mpu_irqs;
struct omap_hwmod_dma_info *sdma_reqs;
struct omap_hwmod_rst_info *rst_lines;
union {
struct omap_hwmod_omap2_prcm omap2;
struct omap_hwmod_omap4_prcm omap4;
} prcm;
const char *main_clk;
struct clk *_clk;
struct omap_hwmod_opt_clk *opt_clks;
char *clkdm_name;
struct clockdomain *clkdm;
struct list_head master_ports; /* connect to *_IA */
struct list_head slave_ports; /* connect to *_TA */
void *dev_attr;
u32 _sysc_cache;
void __iomem *_mpu_rt_va;
spinlock_t _lock;
struct lock_class_key hwmod_key; /* unique lock class */
struct list_head node;
struct omap_hwmod_ocp_if *_mpu_port;
unsigned int (*xlate_irq)(unsigned int);
u16 flags;
u8 mpu_rt_idx;
u8 response_lat;
u8 rst_lines_cnt;
u8 opt_clks_cnt;
u8 masters_cnt;
u8 slaves_cnt;
u8 hwmods_cnt;
u8 _int_flags;
u8 _state;
u8 _postsetup_state;
struct omap_hwmod *parent_hwmod;
};
struct omap_hwmod *omap_hwmod_lookup(const char *name);
int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
void *data);
int __init omap_hwmod_setup_one(const char *name);
int omap_hwmod_enable(struct omap_hwmod *oh);
int omap_hwmod_idle(struct omap_hwmod *oh);
int omap_hwmod_shutdown(struct omap_hwmod *oh);
int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name);
int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name);
void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs);
u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs);
int omap_hwmod_softreset(struct omap_hwmod *oh);
int omap_hwmod_count_resources(struct omap_hwmod *oh, unsigned long flags);
int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res);
int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type,
const char *name, struct resource *res);
struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh);
void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh);
int omap_hwmod_enable_wakeup(struct omap_hwmod *oh);
int omap_hwmod_disable_wakeup(struct omap_hwmod *oh);
int omap_hwmod_for_each_by_class(const char *classname,
int (*fn)(struct omap_hwmod *oh,
void *user),
void *user);
int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state);
int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh);
extern void __init omap_hwmod_init(void);
const char *omap_hwmod_get_main_clk(struct omap_hwmod *oh);
/*
*
*/
extern int omap_hwmod_aess_preprogram(struct omap_hwmod *oh);
void omap_hwmod_rtc_unlock(struct omap_hwmod *oh);
void omap_hwmod_rtc_lock(struct omap_hwmod *oh);
/*
* Chip variant-specific hwmod init routines - XXX should be converted
* to use initcalls once the initial boot ordering is straightened out
*/
extern int omap2420_hwmod_init(void);
extern int omap2430_hwmod_init(void);
extern int omap3xxx_hwmod_init(void);
extern int omap44xx_hwmod_init(void);
extern int omap54xx_hwmod_init(void);
extern int am33xx_hwmod_init(void);
extern int dm814x_hwmod_init(void);
extern int dm816x_hwmod_init(void);
extern int dra7xx_hwmod_init(void);
int am43xx_hwmod_init(void);
extern int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois);
#endif
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