include/linux/platform_data/pm33xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * TI pm33xx platform data
   4  *
   5  * Copyright (C) 2016-2018 Texas Instruments, Inc.
   6  *      Dave Gerlach <d-gerlach@ti.com>
   7  */
   8
   9 #ifndef _LINUX_PLATFORM_DATA_PM33XX_H
  10 #define _LINUX_PLATFORM_DATA_PM33XX_H
  11
  12 #include <linux/kbuild.h>
  13 #include <linux/types.h>
  14
  15 /*
  16  * WFI Flags for sleep code control
  17  *
  18  * These flags allow PM code to exclude certain operations from happening
  19  * in the low level ASM code found in sleep33xx.S and sleep43xx.S
  20  *
  21  * WFI_FLAG_FLUSH_CACHE: Flush the ARM caches and disable caching. Only
  22  *                       needed when MPU will lose context.
  23  * WFI_FLAG_SELF_REFRESH: Let EMIF place DDR memory into self-refresh and
  24  *                        disable EMIF.
  25  * WFI_FLAG_SAVE_EMIF: Save context of all EMIF registers and restore in
  26  *                     resume path. Only needed if PER domain loses context
  27  *                     and must also have WFI_FLAG_SELF_REFRESH set.
  28  * WFI_FLAG_WAKE_M3: Disable MPU clock or clockdomain to cause wkup_m3 to
  29  *                   execute when WFI instruction executes.
  30  * WFI_FLAG_RTC_ONLY: Configure the RTC to enter RTC+DDR mode.
  31  */
  32 #define WFI_FLAG_FLUSH_CACHE            BIT(0)
  33 #define WFI_FLAG_SELF_REFRESH           BIT(1)
  34 #define WFI_FLAG_SAVE_EMIF              BIT(2)
  35 #define WFI_FLAG_WAKE_M3                BIT(3)
  36 #define WFI_FLAG_RTC_ONLY               BIT(4)
  37
  38 #ifndef __ASSEMBLER__
  39 struct am33xx_pm_sram_addr {
  40         void (*do_wfi)(void);
  41         unsigned long *do_wfi_sz;
  42         unsigned long *resume_offset;
  43         unsigned long *emif_sram_table;
  44         unsigned long *ro_sram_data;
  45         unsigned long resume_address;
  46 };
  47
  48 struct am33xx_pm_platform_data {
  49         int     (*init)(int (*idle)(u32 wfi_flags));
  50         int     (*deinit)(void);
  51         int     (*soc_suspend)(unsigned int state, int (*fn)(unsigned long),
  52                                unsigned long args);
  53         int     (*cpu_suspend)(int (*fn)(unsigned long), unsigned long args);
  54         void    (*begin_suspend)(void);
  55         void    (*finish_suspend)(void);
  56         struct  am33xx_pm_sram_addr *(*get_sram_addrs)(void);
  57         void (*save_context)(void);
  58         void (*restore_context)(void);
  59         int (*check_off_mode_enable)(void);
  60 };
  61
  62 struct am33xx_pm_sram_data {
  63         u32 wfi_flags;
  64         u32 l2_aux_ctrl_val;
  65         u32 l2_prefetch_ctrl_val;
  66 } __packed __aligned(8);
  67
  68 struct am33xx_pm_ro_sram_data {
  69         u32 amx3_pm_sram_data_virt;
  70         u32 amx3_pm_sram_data_phys;
  71         void __iomem *rtc_base_virt;
  72 } __packed __aligned(8);
  73
  74 #endif /* __ASSEMBLER__ */
  75 #endif /* _LINUX_PLATFORM_DATA_PM33XX_H */