1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2018 Cadence Design Systems Inc.
11 #include <asm/bitsperlong.h>
13 #include <linux/bitops.h>
14 #include <linux/i2c.h>
15 #include <linux/i3c/ccc.h>
16 #include <linux/i3c/device.h>
17 #include <linux/rwsem.h>
18 #include <linux/spinlock.h>
19 #include <linux/workqueue.h>
21 #define I3C_HOT_JOIN_ADDR 0x2
22 #define I3C_BROADCAST_ADDR 0x7e
23 #define I3C_MAX_ADDR GENMASK(6, 0)
27 /* notifier actions. notifier call data is the struct i3c_bus */
30 I3C_NOTIFY_BUS_REMOVE,
33 struct i3c_master_controller;
36 extern const struct bus_type i3c_bus_type;
39 * struct i3c_i2c_dev_desc - Common part of the I3C/I2C device descriptor
40 * @node: node element used to insert the slot into the I2C or I3C device
42 * @master: I3C master that instantiated this device. Will be used to do
44 * @master_priv: master private data assigned to the device. Can be used to
45 * add master specific information
47 * This structure is describing common I3C/I2C dev information.
49 struct i3c_i2c_dev_desc {
50 struct list_head node;
51 struct i3c_master_controller *master;
55 #define I3C_LVR_I2C_INDEX_MASK GENMASK(7, 5)
56 #define I3C_LVR_I2C_INDEX(x) ((x) << 5)
57 #define I3C_LVR_I2C_FM_MODE BIT(4)
59 #define I2C_MAX_ADDR GENMASK(6, 0)
62 * struct i2c_dev_boardinfo - I2C device board information
63 * @node: used to insert the boardinfo object in the I2C boardinfo list
64 * @base: regular I2C board information
65 * @lvr: LVR (Legacy Virtual Register) needed by the I3C core to know about
66 * the I2C device limitations
68 * This structure is used to attach board-level information to an I2C device.
69 * Each I2C device connected on the I3C bus should have one.
71 struct i2c_dev_boardinfo {
72 struct list_head node;
73 struct i2c_board_info base;
78 * struct i2c_dev_desc - I2C device descriptor
79 * @common: common part of the I2C device descriptor
80 * @dev: I2C device object registered to the I2C framework
81 * @addr: I2C device address
82 * @lvr: LVR (Legacy Virtual Register) needed by the I3C core to know about
83 * the I2C device limitations
85 * Each I2C device connected on the bus will have an i2c_dev_desc.
86 * This object is created by the core and later attached to the controller
87 * using &struct_i3c_master_controller->ops->attach_i2c_dev().
89 * &struct_i2c_dev_desc is the internal representation of an I2C device
90 * connected on an I3C bus. This object is also passed to all
91 * &struct_i3c_master_controller_ops hooks.
94 struct i3c_i2c_dev_desc common;
95 struct i2c_client *dev;
101 * struct i3c_ibi_slot - I3C IBI (In-Band Interrupt) slot
102 * @work: work associated to this slot. The IBI handler will be called from
104 * @dev: the I3C device that has generated this IBI
105 * @len: length of the payload associated to this IBI
106 * @data: payload buffer
108 * An IBI slot is an object pre-allocated by the controller and used when an
110 * Every time an IBI comes in, the I3C master driver should find a free IBI
111 * slot in its IBI slot pool, retrieve the IBI payload and queue the IBI using
112 * i3c_master_queue_ibi().
114 * How IBI slots are allocated is left to the I3C master driver, though, for
115 * simple kmalloc-based allocation, the generic IBI slot pool can be used.
117 struct i3c_ibi_slot {
118 struct work_struct work;
119 struct i3c_dev_desc *dev;
125 * struct i3c_device_ibi_info - IBI information attached to a specific device
126 * @all_ibis_handled: used to be informed when no more IBIs are waiting to be
127 * processed. Used by i3c_device_disable_ibi() to wait for
128 * all IBIs to be dequeued
129 * @pending_ibis: count the number of pending IBIs. Each pending IBI has its
130 * work element queued to the controller workqueue
131 * @max_payload_len: maximum payload length for an IBI coming from this device.
132 * this value is specified when calling
133 * i3c_device_request_ibi() and should not change at run
134 * time. All messages IBIs exceeding this limit should be
135 * rejected by the master
136 * @num_slots: number of IBI slots reserved for this device
137 * @enabled: reflect the IBI status
138 * @wq: workqueue used to execute IBI handlers.
139 * @handler: IBI handler specified at i3c_device_request_ibi() call time. This
140 * handler will be called from the controller workqueue, and as such
141 * is allowed to sleep (though it is recommended to process the IBI
142 * as fast as possible to not stall processing of other IBIs queued
143 * on the same workqueue).
144 * New I3C messages can be sent from the IBI handler
146 * The &struct_i3c_device_ibi_info object is allocated when
147 * i3c_device_request_ibi() is called and attached to a specific device. This
148 * object is here to manage IBIs coming from a specific I3C device.
150 * Note that this structure is the generic view of the IBI management
151 * infrastructure. I3C master drivers may have their own internal
152 * representation which they can associate to the device using
153 * controller-private data.
155 struct i3c_device_ibi_info {
156 struct completion all_ibis_handled;
157 atomic_t pending_ibis;
158 unsigned int max_payload_len;
159 unsigned int num_slots;
160 unsigned int enabled;
161 struct workqueue_struct *wq;
162 void (*handler)(struct i3c_device *dev,
163 const struct i3c_ibi_payload *payload);
167 * struct i3c_dev_boardinfo - I3C device board information
168 * @node: used to insert the boardinfo object in the I3C boardinfo list
169 * @init_dyn_addr: initial dynamic address requested by the FW. We provide no
170 * guarantee that the device will end up using this address,
171 * but try our best to assign this specific address to the
173 * @static_addr: static address the I3C device listen on before it's been
174 * assigned a dynamic address by the master. Will be used during
175 * bus initialization to assign it a specific dynamic address
176 * before starting DAA (Dynamic Address Assignment)
177 * @pid: I3C Provisioned ID exposed by the device. This is a unique identifier
178 * that may be used to attach boardinfo to i3c_dev_desc when the device
179 * does not have a static address
180 * @of_node: optional DT node in case the device has been described in the DT
182 * This structure is used to attach board-level information to an I3C device.
183 * Not all I3C devices connected on the bus will have a boardinfo. It's only
184 * needed if you want to attach extra resources to a device or assign it a
185 * specific dynamic address.
187 struct i3c_dev_boardinfo {
188 struct list_head node;
192 struct device_node *of_node;
196 * struct i3c_dev_desc - I3C device descriptor
197 * @common: common part of the I3C device descriptor
198 * @info: I3C device information. Will be automatically filled when you create
199 * your device with i3c_master_add_i3c_dev_locked()
200 * @ibi_lock: lock used to protect the &struct_i3c_device->ibi
201 * @ibi: IBI info attached to a device. Should be NULL until
202 * i3c_device_request_ibi() is called
203 * @dev: pointer to the I3C device object exposed to I3C device drivers. This
204 * should never be accessed from I3C master controller drivers. Only core
205 * code should manipulate it in when updating the dev <-> desc link or
206 * when propagating IBI events to the driver
207 * @boardinfo: pointer to the boardinfo attached to this I3C device
209 * Internal representation of an I3C device. This object is only used by the
210 * core and passed to I3C master controller drivers when they're requested to
211 * do some operations on the device.
212 * The core maintains the link between the internal I3C dev descriptor and the
213 * object exposed to the I3C device drivers (&struct_i3c_device).
215 struct i3c_dev_desc {
216 struct i3c_i2c_dev_desc common;
217 struct i3c_device_info info;
218 struct mutex ibi_lock;
219 struct i3c_device_ibi_info *ibi;
220 struct i3c_device *dev;
221 const struct i3c_dev_boardinfo *boardinfo;
225 * struct i3c_device - I3C device object
226 * @dev: device object to register the I3C dev to the device model
227 * @desc: pointer to an i3c device descriptor object. This link is updated
228 * every time the I3C device is rediscovered with a different dynamic
230 * @bus: I3C bus this device is attached to
232 * I3C device object exposed to I3C device drivers. The takes care of linking
233 * this object to the relevant &struct_i3c_dev_desc one.
234 * All I3C devs on the I3C bus are represented, including I3C masters. For each
235 * of them, we have an instance of &struct i3c_device.
239 struct i3c_dev_desc *desc;
244 * The I3C specification says the maximum number of devices connected on the
245 * bus is 11, but this number depends on external parameters like trace length,
246 * capacitive load per Device, and the types of Devices present on the Bus.
247 * I3C master can also have limitations, so this number is just here as a
248 * reference and should be adjusted on a per-controller/per-board basis.
250 #define I3C_BUS_MAX_DEVS 11
252 #define I3C_BUS_MAX_I3C_SCL_RATE 12900000
253 #define I3C_BUS_TYP_I3C_SCL_RATE 12500000
254 #define I3C_BUS_I2C_FM_PLUS_SCL_RATE 1000000
255 #define I3C_BUS_I2C_FM_SCL_RATE 400000
256 #define I3C_BUS_TLOW_OD_MIN_NS 200
259 * enum i3c_bus_mode - I3C bus mode
260 * @I3C_BUS_MODE_PURE: only I3C devices are connected to the bus. No limitation
262 * @I3C_BUS_MODE_MIXED_FAST: I2C devices with 50ns spike filter are present on
263 * the bus. The only impact in this mode is that the
264 * high SCL pulse has to stay below 50ns to trick I2C
265 * devices when transmitting I3C frames
266 * @I3C_BUS_MODE_MIXED_LIMITED: I2C devices without 50ns spike filter are
267 * present on the bus. However they allow
268 * compliance up to the maximum SDR SCL clock
270 * @I3C_BUS_MODE_MIXED_SLOW: I2C devices without 50ns spike filter are present
275 I3C_BUS_MODE_MIXED_FAST,
276 I3C_BUS_MODE_MIXED_LIMITED,
277 I3C_BUS_MODE_MIXED_SLOW,
281 * enum i3c_addr_slot_status - I3C address slot status
282 * @I3C_ADDR_SLOT_FREE: address is free
283 * @I3C_ADDR_SLOT_RSVD: address is reserved
284 * @I3C_ADDR_SLOT_I2C_DEV: address is assigned to an I2C device
285 * @I3C_ADDR_SLOT_I3C_DEV: address is assigned to an I3C device
286 * @I3C_ADDR_SLOT_STATUS_MASK: address slot mask
288 * On an I3C bus, addresses are assigned dynamically, and we need to know which
289 * addresses are free to use and which ones are already assigned.
291 * Addresses marked as reserved are those reserved by the I3C protocol
292 * (broadcast address, ...).
294 enum i3c_addr_slot_status {
297 I3C_ADDR_SLOT_I2C_DEV,
298 I3C_ADDR_SLOT_I3C_DEV,
299 I3C_ADDR_SLOT_STATUS_MASK = 3,
303 * struct i3c_bus - I3C bus object
304 * @cur_master: I3C master currently driving the bus. Since I3C is multi-master
305 * this can change over the time. Will be used to let a master
306 * know whether it needs to request bus ownership before sending
308 * @id: bus ID. Assigned by the framework when register the bus
309 * @addrslots: a bitmap with 2-bits per-slot to encode the address status and
310 * ease the DAA (Dynamic Address Assignment) procedure (see
311 * &enum i3c_addr_slot_status)
312 * @mode: bus mode (see &enum i3c_bus_mode)
313 * @scl_rate.i3c: maximum rate for the clock signal when doing I3C SDR/priv
315 * @scl_rate.i2c: maximum rate for the clock signal when doing I2C transfers
316 * @scl_rate: SCL signal rate for I3C and I2C mode
317 * @devs.i3c: contains a list of I3C device descriptors representing I3C
318 * devices connected on the bus and successfully attached to the
320 * @devs.i2c: contains a list of I2C device descriptors representing I2C
321 * devices connected on the bus and successfully attached to the
323 * @devs: 2 lists containing all I3C/I2C devices connected to the bus
324 * @lock: read/write lock on the bus. This is needed to protect against
325 * operations that have an impact on the whole bus and the devices
326 * connected to it. For example, when asking slaves to drop their
327 * dynamic address (RSTDAA CCC), we need to make sure no one is trying
328 * to send I3C frames to these devices.
329 * Note that this lock does not protect against concurrency between
330 * devices: several drivers can send different I3C/I2C frames through
331 * the same master in parallel. This is the responsibility of the
332 * master to guarantee that frames are actually sent sequentially and
335 * The I3C bus is represented with its own object and not implicitly described
336 * by the I3C master to cope with the multi-master functionality, where one bus
337 * can be shared amongst several masters, each of them requesting bus ownership
341 struct i3c_dev_desc *cur_master;
343 unsigned long addrslots[((I2C_MAX_ADDR + 1) * 2) / BITS_PER_LONG];
344 enum i3c_bus_mode mode;
350 struct list_head i3c;
351 struct list_head i2c;
353 struct rw_semaphore lock;
357 * struct i3c_master_controller_ops - I3C master methods
358 * @bus_init: hook responsible for the I3C bus initialization. You should at
359 * least call master_set_info() from there and set the bus mode.
360 * You can also put controller specific initialization in there.
361 * This method is mandatory.
362 * @bus_cleanup: cleanup everything done in
363 * &i3c_master_controller_ops->bus_init().
364 * This method is optional.
365 * @attach_i3c_dev: called every time an I3C device is attached to the bus. It
366 * can be after a DAA or when a device is statically declared
367 * by the FW, in which case it will only have a static address
368 * and the dynamic address will be 0.
369 * When this function is called, device information have not
370 * been retrieved yet.
371 * This is a good place to attach master controller specific
372 * data to I3C devices.
373 * This method is optional.
374 * @reattach_i3c_dev: called every time an I3C device has its addressed
375 * changed. It can be because the device has been powered
376 * down and has lost its address, or it can happen when a
377 * device had a static address and has been assigned a
378 * dynamic address with SETDASA.
379 * This method is optional.
380 * @detach_i3c_dev: called when an I3C device is detached from the bus. Usually
381 * happens when the master device is unregistered.
382 * This method is optional.
383 * @do_daa: do a DAA (Dynamic Address Assignment) procedure. This is procedure
384 * should send an ENTDAA CCC command and then add all devices
385 * discovered sure the DAA using i3c_master_add_i3c_dev_locked().
386 * Add devices added with i3c_master_add_i3c_dev_locked() will then be
387 * attached or re-attached to the controller.
388 * This method is mandatory.
389 * @supports_ccc_cmd: should return true if the CCC command is supported, false
391 * This method is optional, if not provided the core assumes
392 * all CCC commands are supported.
393 * @send_ccc_cmd: send a CCC command
394 * This method is mandatory.
395 * @priv_xfers: do one or several private I3C SDR transfers
396 * This method is mandatory.
397 * @attach_i2c_dev: called every time an I2C device is attached to the bus.
398 * This is a good place to attach master controller specific
399 * data to I2C devices.
400 * This method is optional.
401 * @detach_i2c_dev: called when an I2C device is detached from the bus. Usually
402 * happens when the master device is unregistered.
403 * This method is optional.
404 * @i2c_xfers: do one or several I2C transfers. Note that, unlike i3c
405 * transfers, the core does not guarantee that buffers attached to
406 * the transfers are DMA-safe. If drivers want to have DMA-safe
407 * buffers, they should use the i2c_get_dma_safe_msg_buf()
408 * and i2c_put_dma_safe_msg_buf() helpers provided by the I2C
410 * This method is mandatory.
411 * @request_ibi: attach an IBI handler to an I3C device. This implies defining
412 * an IBI handler and the constraints of the IBI (maximum payload
413 * length and number of pre-allocated slots).
414 * Some controllers support less IBI-capable devices than regular
415 * devices, so this method might return -%EBUSY if there's no
416 * more space for an extra IBI registration
417 * This method is optional.
418 * @free_ibi: free an IBI previously requested with ->request_ibi(). The IBI
419 * should have been disabled with ->disable_irq() prior to that
420 * This method is mandatory only if ->request_ibi is not NULL.
421 * @enable_ibi: enable the IBI. Only valid if ->request_ibi() has been called
422 * prior to ->enable_ibi(). The controller should first enable
423 * the IBI on the controller end (for example, unmask the hardware
424 * IRQ) and then send the ENEC CCC command (with the IBI flag set)
426 * This method is mandatory only if ->request_ibi is not NULL.
427 * @disable_ibi: disable an IBI. First send the DISEC CCC command with the IBI
428 * flag set and then deactivate the hardware IRQ on the
430 * This method is mandatory only if ->request_ibi is not NULL.
431 * @recycle_ibi_slot: recycle an IBI slot. Called every time an IBI has been
432 * processed by its handler. The IBI slot should be put back
433 * in the IBI slot pool so that the controller can re-use it
435 * This method is mandatory only if ->request_ibi is not
437 * @enable_hotjoin: enable hot join event detect.
438 * @disable_hotjoin: disable hot join event detect.
440 struct i3c_master_controller_ops {
441 int (*bus_init)(struct i3c_master_controller *master);
442 void (*bus_cleanup)(struct i3c_master_controller *master);
443 int (*attach_i3c_dev)(struct i3c_dev_desc *dev);
444 int (*reattach_i3c_dev)(struct i3c_dev_desc *dev, u8 old_dyn_addr);
445 void (*detach_i3c_dev)(struct i3c_dev_desc *dev);
446 int (*do_daa)(struct i3c_master_controller *master);
447 bool (*supports_ccc_cmd)(struct i3c_master_controller *master,
448 const struct i3c_ccc_cmd *cmd);
449 int (*send_ccc_cmd)(struct i3c_master_controller *master,
450 struct i3c_ccc_cmd *cmd);
451 int (*priv_xfers)(struct i3c_dev_desc *dev,
452 struct i3c_priv_xfer *xfers,
454 int (*attach_i2c_dev)(struct i2c_dev_desc *dev);
455 void (*detach_i2c_dev)(struct i2c_dev_desc *dev);
456 int (*i2c_xfers)(struct i2c_dev_desc *dev,
457 const struct i2c_msg *xfers, int nxfers);
458 int (*request_ibi)(struct i3c_dev_desc *dev,
459 const struct i3c_ibi_setup *req);
460 void (*free_ibi)(struct i3c_dev_desc *dev);
461 int (*enable_ibi)(struct i3c_dev_desc *dev);
462 int (*disable_ibi)(struct i3c_dev_desc *dev);
463 void (*recycle_ibi_slot)(struct i3c_dev_desc *dev,
464 struct i3c_ibi_slot *slot);
465 int (*enable_hotjoin)(struct i3c_master_controller *master);
466 int (*disable_hotjoin)(struct i3c_master_controller *master);
470 * struct i3c_master_controller - I3C master controller object
471 * @dev: device to be registered to the device-model
472 * @this: an I3C device object representing this master. This device will be
473 * added to the list of I3C devs available on the bus
474 * @i2c: I2C adapter used for backward compatibility. This adapter is
475 * registered to the I2C subsystem to be as transparent as possible to
476 * existing I2C drivers
477 * @ops: master operations. See &struct i3c_master_controller_ops
478 * @secondary: true if the master is a secondary master
479 * @init_done: true when the bus initialization is done
480 * @hotjoin: true if the master support hotjoin
481 * @boardinfo.i3c: list of I3C boardinfo objects
482 * @boardinfo.i2c: list of I2C boardinfo objects
483 * @boardinfo: board-level information attached to devices connected on the bus
484 * @bus: I3C bus exposed by this master
485 * @wq: workqueue which can be used by master
486 * drivers if they need to postpone operations that need to take place
487 * in a thread context. Typical examples are Hot Join processing which
488 * requires taking the bus lock in maintenance, which in turn, can only
489 * be done from a sleep-able context
491 * A &struct i3c_master_controller has to be registered to the I3C subsystem
492 * through i3c_master_register(). None of &struct i3c_master_controller fields
493 * should be set manually, just pass appropriate values to
494 * i3c_master_register().
496 struct i3c_master_controller {
498 struct i3c_dev_desc *this;
499 struct i2c_adapter i2c;
500 const struct i3c_master_controller_ops *ops;
501 unsigned int secondary : 1;
502 unsigned int init_done : 1;
503 unsigned int hotjoin: 1;
505 struct list_head i3c;
506 struct list_head i2c;
509 struct workqueue_struct *wq;
513 * i3c_bus_for_each_i2cdev() - iterate over all I2C devices present on the bus
515 * @dev: an I2C device descriptor pointer updated to point to the current slot
516 * at each iteration of the loop
518 * Iterate over all I2C devs present on the bus.
520 #define i3c_bus_for_each_i2cdev(bus, dev) \
521 list_for_each_entry(dev, &(bus)->devs.i2c, common.node)
524 * i3c_bus_for_each_i3cdev() - iterate over all I3C devices present on the bus
526 * @dev: and I3C device descriptor pointer updated to point to the current slot
527 * at each iteration of the loop
529 * Iterate over all I3C devs present on the bus.
531 #define i3c_bus_for_each_i3cdev(bus, dev) \
532 list_for_each_entry(dev, &(bus)->devs.i3c, common.node)
534 int i3c_master_do_i2c_xfers(struct i3c_master_controller *master,
535 const struct i2c_msg *xfers,
538 int i3c_master_disec_locked(struct i3c_master_controller *master, u8 addr,
540 int i3c_master_enec_locked(struct i3c_master_controller *master, u8 addr,
542 int i3c_master_entdaa_locked(struct i3c_master_controller *master);
543 int i3c_master_defslvs_locked(struct i3c_master_controller *master);
545 int i3c_master_get_free_addr(struct i3c_master_controller *master,
548 int i3c_master_add_i3c_dev_locked(struct i3c_master_controller *master,
550 int i3c_master_do_daa(struct i3c_master_controller *master);
552 int i3c_master_set_info(struct i3c_master_controller *master,
553 const struct i3c_device_info *info);
555 int i3c_master_register(struct i3c_master_controller *master,
556 struct device *parent,
557 const struct i3c_master_controller_ops *ops,
559 void i3c_master_unregister(struct i3c_master_controller *master);
560 int i3c_master_enable_hotjoin(struct i3c_master_controller *master);
561 int i3c_master_disable_hotjoin(struct i3c_master_controller *master);
564 * i3c_dev_get_master_data() - get master private data attached to an I3C
566 * @dev: the I3C device descriptor to get private data from
568 * Return: the private data previously attached with i3c_dev_set_master_data()
569 * or NULL if no data has been attached to the device.
571 static inline void *i3c_dev_get_master_data(const struct i3c_dev_desc *dev)
573 return dev->common.master_priv;
577 * i3c_dev_set_master_data() - attach master private data to an I3C device
579 * @dev: the I3C device descriptor to attach private data to
580 * @data: private data
582 * This functions allows a master controller to attach per-device private data
583 * which can then be retrieved with i3c_dev_get_master_data().
585 static inline void i3c_dev_set_master_data(struct i3c_dev_desc *dev,
588 dev->common.master_priv = data;
592 * i2c_dev_get_master_data() - get master private data attached to an I2C
594 * @dev: the I2C device descriptor to get private data from
596 * Return: the private data previously attached with i2c_dev_set_master_data()
597 * or NULL if no data has been attached to the device.
599 static inline void *i2c_dev_get_master_data(const struct i2c_dev_desc *dev)
601 return dev->common.master_priv;
605 * i2c_dev_set_master_data() - attach master private data to an I2C device
607 * @dev: the I2C device descriptor to attach private data to
608 * @data: private data
610 * This functions allows a master controller to attach per-device private data
611 * which can then be retrieved with i2c_device_get_master_data().
613 static inline void i2c_dev_set_master_data(struct i2c_dev_desc *dev,
616 dev->common.master_priv = data;
620 * i3c_dev_get_master() - get master used to communicate with a device
623 * Return: the master controller driving @dev
625 static inline struct i3c_master_controller *
626 i3c_dev_get_master(struct i3c_dev_desc *dev)
628 return dev->common.master;
632 * i2c_dev_get_master() - get master used to communicate with a device
635 * Return: the master controller driving @dev
637 static inline struct i3c_master_controller *
638 i2c_dev_get_master(struct i2c_dev_desc *dev)
640 return dev->common.master;
644 * i3c_master_get_bus() - get the bus attached to a master
645 * @master: master object
647 * Return: the I3C bus @master is connected to
649 static inline struct i3c_bus *
650 i3c_master_get_bus(struct i3c_master_controller *master)
655 struct i3c_generic_ibi_pool;
657 struct i3c_generic_ibi_pool *
658 i3c_generic_ibi_alloc_pool(struct i3c_dev_desc *dev,
659 const struct i3c_ibi_setup *req);
660 void i3c_generic_ibi_free_pool(struct i3c_generic_ibi_pool *pool);
662 struct i3c_ibi_slot *
663 i3c_generic_ibi_get_free_slot(struct i3c_generic_ibi_pool *pool);
664 void i3c_generic_ibi_recycle_slot(struct i3c_generic_ibi_pool *pool,
665 struct i3c_ibi_slot *slot);
667 void i3c_master_queue_ibi(struct i3c_dev_desc *dev, struct i3c_ibi_slot *slot);
669 struct i3c_ibi_slot *i3c_master_get_free_ibi_slot(struct i3c_dev_desc *dev);
671 void i3c_for_each_bus_locked(int (*fn)(struct i3c_bus *bus, void *data),
673 int i3c_register_notifier(struct notifier_block *nb);
674 int i3c_unregister_notifier(struct notifier_block *nb);
676 #endif /* I3C_MASTER_H */