drivers/pci/hotplug/cpci_hotplug.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * CompactPCI Hot Plug Core Functions
   4  *
   5  * Copyright (C) 2002 SOMA Networks, Inc.
   6  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   7  * Copyright (C) 2001 IBM Corp.
   8  *
   9  * All rights reserved.
  10  *
  11  * Send feedback to <scottm@somanetworks.com>
  12  */
  13
  14 #ifndef _CPCI_HOTPLUG_H
  15 #define _CPCI_HOTPLUG_H
  16
  17 #include <linux/types.h>
  18 #include <linux/pci.h>
  19 #include <linux/pci_hotplug.h>
  20
  21 /* PICMG 2.1 R2.0 HS CSR bits: */
  22 #define HS_CSR_INS      0x0080
  23 #define HS_CSR_EXT      0x0040
  24 #define HS_CSR_PI       0x0030
  25 #define HS_CSR_LOO      0x0008
  26 #define HS_CSR_PIE      0x0004
  27 #define HS_CSR_EIM      0x0002
  28 #define HS_CSR_DHA      0x0001
  29
  30 struct slot {
  31         u8 number;
  32         unsigned int devfn;
  33         struct pci_bus *bus;
  34         struct pci_dev *dev;
  35         unsigned int latch_status:1;
  36         unsigned int adapter_status:1;
  37         unsigned int extracting;
  38         struct hotplug_slot hotplug_slot;
  39         struct list_head slot_list;
  40 };
  41
  42 struct cpci_hp_controller_ops {
  43         int (*query_enum)(void);
  44         int (*enable_irq)(void);
  45         int (*disable_irq)(void);
  46         int (*check_irq)(void *dev_id);
  47         int (*hardware_test)(struct slot *slot, u32 value);
  48         u8  (*get_power)(struct slot *slot);
  49         int (*set_power)(struct slot *slot, int value);
  50 };
  51
  52 struct cpci_hp_controller {
  53         unsigned int irq;
  54         unsigned long irq_flags;
  55         char *devname;
  56         void *dev_id;
  57         char *name;
  58         struct cpci_hp_controller_ops *ops;
  59 };
  60
  61 static inline const char *slot_name(struct slot *slot)
  62 {
  63         return hotplug_slot_name(&slot->hotplug_slot);
  64 }
  65
  66 static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot)
  67 {
  68         return container_of(hotplug_slot, struct slot, hotplug_slot);
  69 }
  70
  71 int cpci_hp_register_controller(struct cpci_hp_controller *controller);
  72 int cpci_hp_unregister_controller(struct cpci_hp_controller *controller);
  73 int cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last);
  74 int cpci_hp_unregister_bus(struct pci_bus *bus);
  75 int cpci_hp_start(void);
  76 int cpci_hp_stop(void);
  77
  78 /*
  79  * Internal function prototypes, these functions should not be used by
  80  * board/chassis drivers.
  81  */
  82 u8 cpci_get_attention_status(struct slot *slot);
  83 u8 cpci_get_latch_status(struct slot *slot);
  84 u8 cpci_get_adapter_status(struct slot *slot);
  85 u16 cpci_get_hs_csr(struct slot *slot);
  86 int cpci_set_attention_status(struct slot *slot, int status);
  87 int cpci_check_and_clear_ins(struct slot *slot);
  88 int cpci_check_ext(struct slot *slot);
  89 int cpci_clear_ext(struct slot *slot);
  90 int cpci_led_on(struct slot *slot);
  91 int cpci_led_off(struct slot *slot);
  92 int cpci_configure_slot(struct slot *slot);
  93 int cpci_unconfigure_slot(struct slot *slot);
  94
  95 #ifdef CONFIG_HOTPLUG_PCI_CPCI
  96 int cpci_hotplug_init(int debug);
  97 #else
  98 static inline int cpci_hotplug_init(int debug) { return 0; }
  99 #endif
 100
 101 #endif  /* _CPCI_HOTPLUG_H */