arch/arm/mach-highbank/sysregs.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright 2011 Calxeda, Inc.
   4  */
   5 #ifndef _MACH_HIGHBANK__SYSREGS_H_
   6 #define _MACH_HIGHBANK__SYSREGS_H_
   7
   8 #include <linux/io.h>
   9 #include <linux/smp.h>
  10 #include <asm/smp_plat.h>
  11 #include <asm/smp_scu.h>
  12 #include "core.h"
  13
  14 extern void __iomem *sregs_base;
  15
  16 #define HB_SREG_A9_PWR_REQ              0xf00
  17 #define HB_SREG_A9_BOOT_STAT            0xf04
  18 #define HB_SREG_A9_BOOT_DATA            0xf08
  19
  20 #define HB_PWR_SUSPEND                  0
  21 #define HB_PWR_SOFT_RESET               1
  22 #define HB_PWR_HARD_RESET               2
  23 #define HB_PWR_SHUTDOWN                 3
  24
  25 #define SREG_CPU_PWR_CTRL(c)            (0x200 + ((c) * 4))
  26
  27 static inline void highbank_set_core_pwr(void)
  28 {
  29         int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
  30         if (scu_base_addr)
  31                 scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
  32         else
  33                 writel_relaxed(1, sregs_base + SREG_CPU_PWR_CTRL(cpu));
  34 }
  35
  36 static inline void highbank_clear_core_pwr(void)
  37 {
  38         int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
  39         if (scu_base_addr)
  40                 scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
  41         else
  42                 writel_relaxed(0, sregs_base + SREG_CPU_PWR_CTRL(cpu));
  43 }
  44
  45 static inline void highbank_set_pwr_suspend(void)
  46 {
  47         writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
  48         highbank_set_core_pwr();
  49 }
  50
  51 static inline void highbank_set_pwr_shutdown(void)
  52 {
  53         writel(HB_PWR_SHUTDOWN, sregs_base + HB_SREG_A9_PWR_REQ);
  54         highbank_set_core_pwr();
  55 }
  56
  57 static inline void highbank_set_pwr_soft_reset(void)
  58 {
  59         writel(HB_PWR_SOFT_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
  60         highbank_set_core_pwr();
  61 }
  62
  63 static inline void highbank_set_pwr_hard_reset(void)
  64 {
  65         writel(HB_PWR_HARD_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
  66         highbank_set_core_pwr();
  67 }
  68
  69 static inline void highbank_clear_pwr_request(void)
  70 {
  71         writel(~0UL, sregs_base + HB_SREG_A9_PWR_REQ);
  72         highbank_clear_core_pwr();
  73 }
  74
  75 #endif