root/include/linux/usb/typec_altmode.h

INCLUDED FROM

DEFINITIONS

1. typec_altmode_set_drvdata
2. typec_altmode_get_drvdata
3. typec_altmode_get_orientation

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 
   3 #ifndef __USB_TYPEC_ALTMODE_H
   4 #define __USB_TYPEC_ALTMODE_H
   5 
   6 #include <linux/mod_devicetable.h>
   7 #include <linux/usb/typec.h>
   8 #include <linux/device.h>
   9 
  10 #define MODE_DISCOVERY_MAX      6
  11 
  12 struct typec_altmode_ops;
  13 
  14 /**
  15  * struct typec_altmode - USB Type-C alternate mode device
  16  * @dev: Driver model's view of this device
  17  * @svid: Standard or Vendor ID (SVID) of the alternate mode
  18  * @mode: Index of the Mode
  19  * @vdo: VDO returned by Discover Modes USB PD command
  20  * @active: Tells has the mode been entered or not
  21  * @desc: Optional human readable description of the mode
  22  * @ops: Operations vector from the driver
  23  */
  24 struct typec_altmode {
  25         struct device                   dev;
  26         u16                             svid;
  27         int                             mode;
  28         u32                             vdo;
  29         unsigned int                    active:1;
  30 
  31         char                            *desc;
  32         const struct typec_altmode_ops  *ops;
  33 };
  34 
  35 #define to_typec_altmode(d) container_of(d, struct typec_altmode, dev)
  36 
  37 static inline void typec_altmode_set_drvdata(struct typec_altmode *altmode,
  38                                              void *data)
  39 {
  40         dev_set_drvdata(&altmode->dev, data);
  41 }
  42 
  43 static inline void *typec_altmode_get_drvdata(struct typec_altmode *altmode)
  44 {
  45         return dev_get_drvdata(&altmode->dev);
  46 }
  47 
  48 /**
  49  * struct typec_altmode_ops - Alternate mode specific operations vector
  50  * @enter: Operations to be executed with Enter Mode Command
  51  * @exit: Operations to be executed with Exit Mode Command
  52  * @attention: Callback for Attention Command
  53  * @vdm: Callback for SVID specific commands
  54  * @notify: Communication channel for platform and the alternate mode
  55  * @activate: User callback for Enter/Exit Mode
  56  */
  57 struct typec_altmode_ops {
  58         int (*enter)(struct typec_altmode *altmode);
  59         int (*exit)(struct typec_altmode *altmode);
  60         void (*attention)(struct typec_altmode *altmode, u32 vdo);
  61         int (*vdm)(struct typec_altmode *altmode, const u32 hdr,
  62                    const u32 *vdo, int cnt);
  63         int (*notify)(struct typec_altmode *altmode, unsigned long conf,
  64                       void *data);
  65         int (*activate)(struct typec_altmode *altmode, int activate);
  66 };
  67 
  68 int typec_altmode_enter(struct typec_altmode *altmode);
  69 int typec_altmode_exit(struct typec_altmode *altmode);
  70 void typec_altmode_attention(struct typec_altmode *altmode, u32 vdo);
  71 int typec_altmode_vdm(struct typec_altmode *altmode,
  72                       const u32 header, const u32 *vdo, int count);
  73 int typec_altmode_notify(struct typec_altmode *altmode, unsigned long conf,
  74                          void *data);
  75 const struct typec_altmode *
  76 typec_altmode_get_partner(struct typec_altmode *altmode);
  77 
  78 /*
  79  * These are the connector states (USB, Safe and Alt Mode) defined in USB Type-C
  80  * Specification. SVID specific connector states are expected to follow and
  81  * start from the value TYPEC_STATE_MODAL.
  82  */
  83 enum {
  84         TYPEC_STATE_SAFE,       /* USB Safe State */
  85         TYPEC_STATE_USB,        /* USB Operation */
  86         TYPEC_STATE_MODAL,      /* Alternate Modes */
  87 };
  88 
  89 /*
  90  * For the muxes there is no difference between Accessory Modes and Alternate
  91  * Modes, so the Accessory Modes are supplied with specific modal state values
  92  * here. Unlike with Alternate Modes, where the mux will be linked with the
  93  * alternate mode device, the mux for Accessory Modes will be linked with the
  94  * port device instead.
  95  *
  96  * Port drivers can use TYPEC_MODE_AUDIO and TYPEC_MODE_DEBUG as the mode
  97  * value for typec_set_mode() when accessory modes are supported.
  98  */
  99 enum {
 100         TYPEC_MODE_AUDIO = TYPEC_STATE_MODAL,   /* Audio Accessory */
 101         TYPEC_MODE_DEBUG,                       /* Debug Accessory */
 102 };
 103 
 104 #define TYPEC_MODAL_STATE(_state_)      ((_state_) + TYPEC_STATE_MODAL)
 105 
 106 struct typec_altmode *typec_altmode_get_plug(struct typec_altmode *altmode,
 107                                              enum typec_plug_index index);
 108 void typec_altmode_put_plug(struct typec_altmode *plug);
 109 
 110 struct typec_altmode *typec_match_altmode(struct typec_altmode **altmodes,
 111                                           size_t n, u16 svid, u8 mode);
 112 
 113 struct typec_altmode *
 114 typec_altmode_register_notifier(struct device *dev, u16 svid, u8 mode,
 115                                 struct notifier_block *nb);
 116 
 117 void typec_altmode_unregister_notifier(struct typec_altmode *adev,
 118                                        struct notifier_block *nb);
 119 
 120 /**
 121  * typec_altmode_get_orientation - Get cable plug orientation
 122  * altmode: Handle to the alternate mode
 123  */
 124 static inline enum typec_orientation
 125 typec_altmode_get_orientation(struct typec_altmode *altmode)
 126 {
 127         return typec_get_orientation(typec_altmode2port(altmode));
 128 }
 129 
 130 /**
 131  * struct typec_altmode_driver - USB Type-C alternate mode device driver
 132  * @id_table: Null terminated array of SVIDs
 133  * @probe: Callback for device binding
 134  * @remove: Callback for device unbinding
 135  * @driver: Device driver model driver
 136  *
 137  * These drivers will be bind to the partner alternate mode devices. They will
 138  * handle all SVID specific communication.
 139  */
 140 struct typec_altmode_driver {
 141         const struct typec_device_id *id_table;
 142         int (*probe)(struct typec_altmode *altmode);
 143         void (*remove)(struct typec_altmode *altmode);
 144         struct device_driver driver;
 145 };
 146 
 147 #define to_altmode_driver(d) container_of(d, struct typec_altmode_driver, \
 148                                           driver)
 149 
 150 #define typec_altmode_register_driver(drv) \
 151                 __typec_altmode_register_driver(drv, THIS_MODULE)
 152 int __typec_altmode_register_driver(struct typec_altmode_driver *drv,
 153                                     struct module *module);
 154 void typec_altmode_unregister_driver(struct typec_altmode_driver *drv);
 155 
 156 #define module_typec_altmode_driver(__typec_altmode_driver) \
 157         module_driver(__typec_altmode_driver, typec_altmode_register_driver, \
 158                       typec_altmode_unregister_driver)
 159 
 160 #endif /* __USB_TYPEC_ALTMODE_H */