Lines Matching +full:i3c +full:- +full:scl +full:- +full:hz
1 // SPDX-License-Identifier: GPL-2.0
28 * i3c_bus_maintenance_lock - Lock the bus for a maintenance operation
29 * @bus: I3C bus to take the lock on
33 * - enabling/disabling slave events
34 * - re-triggering DAA
35 * - changing the dynamic address of a device
36 * - relinquishing mastership
37 * - ...
40 * logic to rely on I3C device information that could be changed behind their
45 down_write(&bus->lock); in i3c_bus_maintenance_lock()
49 * i3c_bus_maintenance_unlock - Release the bus lock after a maintenance
51 * @bus: I3C bus to release the lock on
59 up_write(&bus->lock); in i3c_bus_maintenance_unlock()
63 * i3c_bus_normaluse_lock - Lock the bus for a normal operation
64 * @bus: I3C bus to take the lock on
67 * operation (see i3c_bus_maintenance_lock() for a non-exhaustive list of
68 * maintenance operations). Basically all communications with I3C devices are
70 * state or I3C dynamic address).
73 * In other words, transfer requests passed to the I3C master can be submitted
74 * in parallel and I3C master drivers have to use their own locking to make
75 * sure two different communications are not inter-mixed, or access to the
80 down_read(&bus->lock); in i3c_bus_normaluse_lock()
84 * i3c_bus_normaluse_unlock - Release the bus lock after a normal operation
85 * @bus: I3C bus to release the lock on
93 up_read(&bus->lock); in i3c_bus_normaluse_unlock()
113 if (dev->type == &i3c_device_type) in dev_to_i3cbus()
114 return dev_to_i3cdev(dev)->bus; in dev_to_i3cbus()
118 return &master->bus; in dev_to_i3cbus()
125 if (dev->type == &i3c_device_type) in dev_to_i3cdesc()
126 return dev_to_i3cdev(dev)->desc; in dev_to_i3cdesc()
130 return master->this; in dev_to_i3cdesc()
143 ret = sprintf(buf, "%x\n", desc->info.bcr); in bcr_show()
160 ret = sprintf(buf, "%x\n", desc->info.dcr); in dcr_show()
177 ret = sprintf(buf, "%llx\n", desc->info.pid); in pid_show()
194 ret = sprintf(buf, "%02x\n", desc->info.dyn_addr); in dynamic_address_show()
202 "hdr-ddr", "hdr-tsp", "hdr-tsl",
217 caps = desc->info.hdr_cap; in hdrcap_show()
249 struct i3c_device *i3c = dev_to_i3cdev(dev); in modalias_show() local
253 i3c_device_get_info(i3c, &devinfo); in modalias_show()
259 return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr, in modalias_show()
262 return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X", in modalias_show()
290 return add_uevent_var(env, "MODALIAS=i3c:dcr%02Xmanuf%04X", in i3c_device_uevent()
294 "MODALIAS=i3c:dcr%02Xmanuf%04Xpart%04Xext%04X", in i3c_device_uevent()
308 if (dev->type != &i3c_device_type) in i3c_device_match()
313 if (i3c_device_match_id(i3cdev, i3cdrv->id_table)) in i3c_device_match()
322 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver); in i3c_device_probe()
324 return driver->probe(i3cdev); in i3c_device_probe()
330 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver); in i3c_device_remove()
332 if (driver->remove) in i3c_device_remove()
333 driver->remove(i3cdev); in i3c_device_remove()
339 .name = "i3c",
354 status = bus->addrslots[bitpos / BITS_PER_LONG]; in i3c_bus_get_addr_slot_status()
369 ptr = bus->addrslots + (bitpos / BITS_PER_LONG); in i3c_bus_set_addr_slot_status()
395 return -ENOMEM; in i3c_bus_get_free_addr()
420 idr_remove(&i3c_bus_idr, i3cbus->id); in i3c_bus_cleanup()
426 int ret, start, end, id = -1; in i3c_bus_init()
428 init_rwsem(&i3cbus->lock); in i3c_bus_init()
429 INIT_LIST_HEAD(&i3cbus->devs.i2c); in i3c_bus_init()
430 INIT_LIST_HEAD(&i3cbus->devs.i3c); in i3c_bus_init()
432 i3cbus->mode = I3C_BUS_MODE_PURE; in i3c_bus_init()
435 id = of_alias_get_id(np, "i3c"); in i3c_bus_init()
452 i3cbus->id = ret; in i3c_bus_init()
489 [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
490 [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited",
491 [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow",
502 if (i3cbus->mode < 0 || in mode_show()
503 i3cbus->mode >= ARRAY_SIZE(i3c_bus_mode_strings) || in mode_show()
504 !i3c_bus_mode_strings[i3cbus->mode]) in mode_show()
507 ret = sprintf(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]); in mode_show()
522 ret = sprintf(buf, "%d-%llx\n", i3cbus->id, in current_master_show()
523 i3cbus->cur_master->info.pid); in current_master_show()
538 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i3c); in i3c_scl_frequency_show()
553 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i2c); in i2c_scl_frequency_show()
564 if (!master || !master->ops) in i3c_set_hotjoin()
565 return -EINVAL; in i3c_set_hotjoin()
567 if (!master->ops->enable_hotjoin || !master->ops->disable_hotjoin) in i3c_set_hotjoin()
568 return -EINVAL; in i3c_set_hotjoin()
570 i3c_bus_normaluse_lock(&master->bus); in i3c_set_hotjoin()
573 ret = master->ops->enable_hotjoin(master); in i3c_set_hotjoin()
575 ret = master->ops->disable_hotjoin(master); in i3c_set_hotjoin()
577 master->hotjoin = enable; in i3c_set_hotjoin()
579 i3c_bus_normaluse_unlock(&master->bus); in i3c_set_hotjoin()
591 if (!i3cbus->cur_master) in hotjoin_store()
592 return -EINVAL; in hotjoin_store()
595 return -EINVAL; in hotjoin_store()
597 ret = i3c_set_hotjoin(i3cbus->cur_master->common.master, res); in hotjoin_store()
605 * i3c_master_enable_hotjoin - Enable hotjoin
606 * @master: I3C master object
617 * i3c_master_disable_hotjoin - Disable hotjoin
618 * @master: I3C master object
634 ret = sysfs_emit(buf, "%d\n", i3cbus->cur_master->common.master->hotjoin); in hotjoin_show()
662 if (master->wq) in i3c_masterdev_release()
663 destroy_workqueue(master->wq); in i3c_masterdev_release()
665 WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c)); in i3c_masterdev_release()
668 of_node_put(dev->of_node); in i3c_masterdev_release()
680 i3cbus->mode = mode; in i3c_bus_set_mode()
682 switch (i3cbus->mode) { in i3c_bus_set_mode()
684 if (!i3cbus->scl_rate.i3c) in i3c_bus_set_mode()
685 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; in i3c_bus_set_mode()
689 if (!i3cbus->scl_rate.i3c) in i3c_bus_set_mode()
690 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; in i3c_bus_set_mode()
691 if (!i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
692 i3cbus->scl_rate.i2c = max_i2c_scl_rate; in i3c_bus_set_mode()
695 if (!i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
696 i3cbus->scl_rate.i2c = max_i2c_scl_rate; in i3c_bus_set_mode()
697 if (!i3cbus->scl_rate.i3c || in i3c_bus_set_mode()
698 i3cbus->scl_rate.i3c > i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
699 i3cbus->scl_rate.i3c = i3cbus->scl_rate.i2c; in i3c_bus_set_mode()
702 return -EINVAL; in i3c_bus_set_mode()
705 dev_dbg(&master->dev, "i2c-scl = %ld Hz i3c-scl = %ld Hz\n", in i3c_bus_set_mode()
706 i3cbus->scl_rate.i2c, i3cbus->scl_rate.i3c); in i3c_bus_set_mode()
709 * I3C/I2C frequency may have been overridden, check that user-provided in i3c_bus_set_mode()
712 if (i3cbus->scl_rate.i3c > I3C_BUS_MAX_I3C_SCL_RATE || in i3c_bus_set_mode()
713 i3cbus->scl_rate.i2c > I3C_BUS_I2C_FM_PLUS_SCL_RATE) in i3c_bus_set_mode()
714 return -EINVAL; in i3c_bus_set_mode()
728 return &master->i2c; in i3c_master_to_i2c_adapter()
744 return ERR_PTR(-ENOMEM); in i3c_master_alloc_i2c_dev()
746 dev->common.master = master; in i3c_master_alloc_i2c_dev()
747 dev->addr = addr; in i3c_master_alloc_i2c_dev()
748 dev->lvr = lvr; in i3c_master_alloc_i2c_dev()
756 dest->addr = addr; in i3c_ccc_cmd_dest_init()
757 dest->payload.len = payloadlen; in i3c_ccc_cmd_dest_init()
759 dest->payload.data = kzalloc(payloadlen, GFP_KERNEL); in i3c_ccc_cmd_dest_init()
761 dest->payload.data = NULL; in i3c_ccc_cmd_dest_init()
763 return dest->payload.data; in i3c_ccc_cmd_dest_init()
768 kfree(dest->payload.data); in i3c_ccc_cmd_dest_cleanup()
775 cmd->rnw = rnw ? 1 : 0; in i3c_ccc_cmd_init()
776 cmd->id = id; in i3c_ccc_cmd_init()
777 cmd->dests = dests; in i3c_ccc_cmd_init()
778 cmd->ndests = ndests; in i3c_ccc_cmd_init()
779 cmd->err = I3C_ERROR_UNKNOWN; in i3c_ccc_cmd_init()
788 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
790 if (WARN_ON(master->init_done && in i3c_master_send_ccc_cmd_locked()
791 !rwsem_is_locked(&master->bus.lock))) in i3c_master_send_ccc_cmd_locked()
792 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
794 if (!master->ops->send_ccc_cmd) in i3c_master_send_ccc_cmd_locked()
795 return -ENOTSUPP; in i3c_master_send_ccc_cmd_locked()
797 if ((cmd->id & I3C_CCC_DIRECT) && (!cmd->dests || !cmd->ndests)) in i3c_master_send_ccc_cmd_locked()
798 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
800 if (master->ops->supports_ccc_cmd && in i3c_master_send_ccc_cmd_locked()
801 !master->ops->supports_ccc_cmd(master, cmd)) in i3c_master_send_ccc_cmd_locked()
802 return -ENOTSUPP; in i3c_master_send_ccc_cmd_locked()
804 ret = master->ops->send_ccc_cmd(master, cmd); in i3c_master_send_ccc_cmd_locked()
806 if (cmd->err != I3C_ERROR_UNKNOWN) in i3c_master_send_ccc_cmd_locked()
807 return cmd->err; in i3c_master_send_ccc_cmd_locked()
821 i3c_bus_for_each_i2cdev(&master->bus, dev) { in i3c_master_find_i2c_dev_by_addr()
822 if (dev->addr == addr) in i3c_master_find_i2c_dev_by_addr()
830 * i3c_master_get_free_addr() - get a free address on the bus
831 * @master: I3C master object
836 * Return: the first free address starting at @start_addr (included) or -ENOMEM
842 return i3c_bus_get_free_addr(&master->bus, start_addr); in i3c_master_get_free_addr()
850 WARN_ON(i3cdev->desc); in i3c_device_release()
852 of_node_put(i3cdev->dev.of_node); in i3c_device_release()
869 return ERR_PTR(-ENOMEM); in i3c_master_alloc_i3c_dev()
871 dev->common.master = master; in i3c_master_alloc_i3c_dev()
872 dev->info = *info; in i3c_master_alloc_i3c_dev()
873 mutex_init(&dev->ibi_lock); in i3c_master_alloc_i3c_dev()
887 return -EINVAL; in i3c_master_rstdaa_locked()
889 addrstat = i3c_bus_get_addr_slot_status(&master->bus, addr); in i3c_master_rstdaa_locked()
891 return -EINVAL; in i3c_master_rstdaa_locked()
904 * i3c_master_entdaa_locked() - start a DAA (Dynamic Address Assignment)
911 * behind dynamic address assignment has to be handled in the I3C master
916 * Return: 0 in case of success, a positive I3C error code if the error is
944 return -ENOMEM; in i3c_master_enec_disec_locked()
946 events->events = evts; in i3c_master_enec_disec_locked()
959 * i3c_master_disec_locked() - send a DISEC CCC command
961 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
969 * Return: 0 in case of success, a positive I3C error code if the error is
980 * i3c_master_enec_locked() - send an ENEC CCC command
982 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
990 * Return: 0 in case of success, a positive I3C error code if the error is
1001 * i3c_master_defslvs_locked() - send a DEFSLVS CCC command
1008 * This should be called after all I3C devices have been discovered (in other
1010 * &i3c_master_controller_ops->bus_init().
1011 * It should also be called if a master ACKed an Hot-Join request and assigned
1016 * Return: 0 in case of success, a positive I3C error code if the error is
1032 return -EINVAL; in i3c_master_defslvs_locked()
1038 if (i3cdev == master->this) in i3c_master_defslvs_locked()
1041 if (I3C_BCR_DEVICE_ROLE(i3cdev->info.bcr) == in i3c_master_defslvs_locked()
1055 ndevs - 1)); in i3c_master_defslvs_locked()
1057 return -ENOMEM; in i3c_master_defslvs_locked()
1059 defslvs->count = ndevs; in i3c_master_defslvs_locked()
1060 defslvs->master.bcr = master->this->info.bcr; in i3c_master_defslvs_locked()
1061 defslvs->master.dcr = master->this->info.dcr; in i3c_master_defslvs_locked()
1062 defslvs->master.dyn_addr = master->this->info.dyn_addr << 1; in i3c_master_defslvs_locked()
1063 defslvs->master.static_addr = I3C_BROADCAST_ADDR << 1; in i3c_master_defslvs_locked()
1065 desc = defslvs->slaves; in i3c_master_defslvs_locked()
1067 desc->lvr = i2cdev->lvr; in i3c_master_defslvs_locked()
1068 desc->static_addr = i2cdev->addr << 1; in i3c_master_defslvs_locked()
1073 /* Skip the I3C dev representing this master. */ in i3c_master_defslvs_locked()
1074 if (i3cdev == master->this) in i3c_master_defslvs_locked()
1077 desc->bcr = i3cdev->info.bcr; in i3c_master_defslvs_locked()
1078 desc->dcr = i3cdev->info.dcr; in i3c_master_defslvs_locked()
1079 desc->dyn_addr = i3cdev->info.dyn_addr << 1; in i3c_master_defslvs_locked()
1080 desc->static_addr = i3cdev->info.static_addr << 1; in i3c_master_defslvs_locked()
1101 return -EINVAL; in i3c_master_setda_locked()
1105 return -ENOMEM; in i3c_master_setda_locked()
1107 setda->addr = newaddr << 1; in i3c_master_setda_locked()
1137 mrl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mrl)); in i3c_master_getmrl_locked()
1139 return -ENOMEM; in i3c_master_getmrl_locked()
1145 if (!(info->bcr & I3C_BCR_IBI_PAYLOAD)) in i3c_master_getmrl_locked()
1146 dest.payload.len -= 1; in i3c_master_getmrl_locked()
1155 info->max_ibi_len = mrl->ibi_len; in i3c_master_getmrl_locked()
1158 info->max_read_len = be16_to_cpu(mrl->read_len); in i3c_master_getmrl_locked()
1161 ret = -EIO; in i3c_master_getmrl_locked()
1179 mwl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mwl)); in i3c_master_getmwl_locked()
1181 return -ENOMEM; in i3c_master_getmwl_locked()
1189 ret = -EIO; in i3c_master_getmwl_locked()
1193 info->max_write_len = be16_to_cpu(mwl->len); in i3c_master_getmwl_locked()
1209 getmaxds = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, in i3c_master_getmxds_locked()
1212 return -ENOMEM; in i3c_master_getmxds_locked()
1221 dest.payload.len -= 3; in i3c_master_getmxds_locked()
1228 ret = -EIO; in i3c_master_getmxds_locked()
1232 info->max_read_ds = getmaxds->maxrd; in i3c_master_getmxds_locked()
1233 info->max_write_ds = getmaxds->maxwr; in i3c_master_getmxds_locked()
1235 info->max_read_turnaround = getmaxds->maxrdturn[0] | in i3c_master_getmxds_locked()
1236 ((u32)getmaxds->maxrdturn[1] << 8) | in i3c_master_getmxds_locked()
1237 ((u32)getmaxds->maxrdturn[2] << 16); in i3c_master_getmxds_locked()
1253 gethdrcap = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, in i3c_master_gethdrcap_locked()
1256 return -ENOMEM; in i3c_master_gethdrcap_locked()
1264 ret = -EIO; in i3c_master_gethdrcap_locked()
1268 info->hdr_cap = gethdrcap->modes; in i3c_master_gethdrcap_locked()
1284 getpid = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getpid)); in i3c_master_getpid_locked()
1286 return -ENOMEM; in i3c_master_getpid_locked()
1293 info->pid = 0; in i3c_master_getpid_locked()
1294 for (i = 0; i < sizeof(getpid->pid); i++) { in i3c_master_getpid_locked()
1295 int sft = (sizeof(getpid->pid) - i - 1) * 8; in i3c_master_getpid_locked()
1297 info->pid |= (u64)getpid->pid[i] << sft; in i3c_master_getpid_locked()
1314 getbcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getbcr)); in i3c_master_getbcr_locked()
1316 return -ENOMEM; in i3c_master_getbcr_locked()
1323 info->bcr = getbcr->bcr; in i3c_master_getbcr_locked()
1339 getdcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getdcr)); in i3c_master_getdcr_locked()
1341 return -ENOMEM; in i3c_master_getdcr_locked()
1348 info->dcr = getdcr->dcr; in i3c_master_getdcr_locked()
1362 if (!dev->info.dyn_addr) in i3c_master_retrieve_dev_info()
1363 return -EINVAL; in i3c_master_retrieve_dev_info()
1365 slot_status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_retrieve_dev_info()
1366 dev->info.dyn_addr); in i3c_master_retrieve_dev_info()
1369 return -EINVAL; in i3c_master_retrieve_dev_info()
1371 ret = i3c_master_getpid_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1375 ret = i3c_master_getbcr_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1379 ret = i3c_master_getdcr_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1383 if (dev->info.bcr & I3C_BCR_MAX_DATA_SPEED_LIM) { in i3c_master_retrieve_dev_info()
1384 ret = i3c_master_getmxds_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1389 if (dev->info.bcr & I3C_BCR_IBI_PAYLOAD) in i3c_master_retrieve_dev_info()
1390 dev->info.max_ibi_len = 1; in i3c_master_retrieve_dev_info()
1392 i3c_master_getmrl_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1393 i3c_master_getmwl_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1395 if (dev->info.bcr & I3C_BCR_HDR_CAP) { in i3c_master_retrieve_dev_info()
1396 ret = i3c_master_gethdrcap_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1408 if (dev->info.static_addr) in i3c_master_put_i3c_addrs()
1409 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_put_i3c_addrs()
1410 dev->info.static_addr, in i3c_master_put_i3c_addrs()
1413 if (dev->info.dyn_addr) in i3c_master_put_i3c_addrs()
1414 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_put_i3c_addrs()
1417 if (dev->boardinfo && dev->boardinfo->init_dyn_addr) in i3c_master_put_i3c_addrs()
1418 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_put_i3c_addrs()
1427 if (!dev->info.static_addr && !dev->info.dyn_addr) in i3c_master_get_i3c_addrs()
1430 if (dev->info.static_addr) { in i3c_master_get_i3c_addrs()
1431 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1432 dev->info.static_addr); in i3c_master_get_i3c_addrs()
1437 dev->info.static_addr != dev->boardinfo->init_dyn_addr) in i3c_master_get_i3c_addrs()
1438 return -EBUSY; in i3c_master_get_i3c_addrs()
1440 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1441 dev->info.static_addr, in i3c_master_get_i3c_addrs()
1446 * ->init_dyn_addr should have been reserved before that, so, if we're in i3c_master_get_i3c_addrs()
1447 * trying to apply a pre-reserved dynamic address, we should not try in i3c_master_get_i3c_addrs()
1450 if (dev->info.dyn_addr && in i3c_master_get_i3c_addrs()
1451 (!dev->boardinfo || in i3c_master_get_i3c_addrs()
1452 dev->boardinfo->init_dyn_addr != dev->info.dyn_addr)) { in i3c_master_get_i3c_addrs()
1453 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1454 dev->info.dyn_addr); in i3c_master_get_i3c_addrs()
1458 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_get_i3c_addrs()
1465 if (dev->info.static_addr) in i3c_master_get_i3c_addrs()
1466 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1467 dev->info.static_addr, in i3c_master_get_i3c_addrs()
1470 return -EBUSY; in i3c_master_get_i3c_addrs()
1482 if (!dev->info.static_addr && !dev->info.dyn_addr) in i3c_master_attach_i3c_dev()
1490 if (master->this != dev && master->ops->attach_i3c_dev) { in i3c_master_attach_i3c_dev()
1491 ret = master->ops->attach_i3c_dev(dev); in i3c_master_attach_i3c_dev()
1498 list_add_tail(&dev->common.node, &master->bus.devs.i3c); in i3c_master_attach_i3c_dev()
1510 if (dev->info.dyn_addr != old_dyn_addr && in i3c_master_reattach_i3c_dev()
1511 (!dev->boardinfo || in i3c_master_reattach_i3c_dev()
1512 dev->info.dyn_addr != dev->boardinfo->init_dyn_addr)) { in i3c_master_reattach_i3c_dev()
1513 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_reattach_i3c_dev()
1514 dev->info.dyn_addr); in i3c_master_reattach_i3c_dev()
1516 return -EBUSY; in i3c_master_reattach_i3c_dev()
1517 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_reattach_i3c_dev()
1518 dev->info.dyn_addr, in i3c_master_reattach_i3c_dev()
1521 i3c_bus_set_addr_slot_status(&master->bus, old_dyn_addr, in i3c_master_reattach_i3c_dev()
1525 if (master->ops->reattach_i3c_dev) { in i3c_master_reattach_i3c_dev()
1526 ret = master->ops->reattach_i3c_dev(dev, old_dyn_addr); in i3c_master_reattach_i3c_dev()
1541 if (master->this != dev && master->ops->detach_i3c_dev) in i3c_master_detach_i3c_dev()
1542 master->ops->detach_i3c_dev(dev); in i3c_master_detach_i3c_dev()
1545 list_del(&dev->common.node); in i3c_master_detach_i3c_dev()
1553 if (master->ops->attach_i2c_dev) { in i3c_master_attach_i2c_dev()
1554 ret = master->ops->attach_i2c_dev(dev); in i3c_master_attach_i2c_dev()
1559 list_add_tail(&dev->common.node, &master->bus.devs.i2c); in i3c_master_attach_i2c_dev()
1568 list_del(&dev->common.node); in i3c_master_detach_i2c_dev()
1570 if (master->ops->detach_i2c_dev) in i3c_master_detach_i2c_dev()
1571 master->ops->detach_i2c_dev(dev); in i3c_master_detach_i2c_dev()
1578 .static_addr = boardinfo->static_addr, in i3c_master_early_i3c_dev_add()
1579 .pid = boardinfo->pid, in i3c_master_early_i3c_dev_add()
1586 return -ENOMEM; in i3c_master_early_i3c_dev_add()
1588 i3cdev->boardinfo = boardinfo; in i3c_master_early_i3c_dev_add()
1594 ret = i3c_master_setdasa_locked(master, i3cdev->info.static_addr, in i3c_master_early_i3c_dev_add()
1595 i3cdev->boardinfo->init_dyn_addr); in i3c_master_early_i3c_dev_add()
1599 i3cdev->info.dyn_addr = i3cdev->boardinfo->init_dyn_addr; in i3c_master_early_i3c_dev_add()
1611 i3c_master_rstdaa_locked(master, i3cdev->boardinfo->init_dyn_addr); in i3c_master_early_i3c_dev_add()
1626 if (!master->init_done) in i3c_master_register_new_i3c_devs()
1629 i3c_bus_for_each_i3cdev(&master->bus, desc) { in i3c_master_register_new_i3c_devs()
1630 if (desc->dev || !desc->info.dyn_addr || desc == master->this) in i3c_master_register_new_i3c_devs()
1633 desc->dev = kzalloc(sizeof(*desc->dev), GFP_KERNEL); in i3c_master_register_new_i3c_devs()
1634 if (!desc->dev) in i3c_master_register_new_i3c_devs()
1637 desc->dev->bus = &master->bus; in i3c_master_register_new_i3c_devs()
1638 desc->dev->desc = desc; in i3c_master_register_new_i3c_devs()
1639 desc->dev->dev.parent = &master->dev; in i3c_master_register_new_i3c_devs()
1640 desc->dev->dev.type = &i3c_device_type; in i3c_master_register_new_i3c_devs()
1641 desc->dev->dev.bus = &i3c_bus_type; in i3c_master_register_new_i3c_devs()
1642 desc->dev->dev.release = i3c_device_release; in i3c_master_register_new_i3c_devs()
1643 dev_set_name(&desc->dev->dev, "%d-%llx", master->bus.id, in i3c_master_register_new_i3c_devs()
1644 desc->info.pid); in i3c_master_register_new_i3c_devs()
1646 if (desc->boardinfo) in i3c_master_register_new_i3c_devs()
1647 desc->dev->dev.of_node = desc->boardinfo->of_node; in i3c_master_register_new_i3c_devs()
1649 ret = device_register(&desc->dev->dev); in i3c_master_register_new_i3c_devs()
1651 dev_err(&master->dev, in i3c_master_register_new_i3c_devs()
1652 "Failed to add I3C device (err = %d)\n", ret); in i3c_master_register_new_i3c_devs()
1653 put_device(&desc->dev->dev); in i3c_master_register_new_i3c_devs()
1659 * i3c_master_do_daa() - do a DAA (Dynamic Address Assignment)
1662 * This function is instantiating an I3C device object and adding it to the
1663 * I3C device list. All device information are automatically retrieved using
1666 * The I3C device object is returned in case the master wants to attach
1677 i3c_bus_maintenance_lock(&master->bus); in i3c_master_do_daa()
1678 ret = master->ops->do_daa(master); in i3c_master_do_daa()
1679 i3c_bus_maintenance_unlock(&master->bus); in i3c_master_do_daa()
1684 i3c_bus_normaluse_lock(&master->bus); in i3c_master_do_daa()
1686 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_do_daa()
1693 * i3c_master_set_info() - set master device information
1695 * @info: I3C device information
1698 * &i3c_master_controller_ops->bus_init().
1703 * - &i3c_device_info->dyn_addr
1704 * - &i3c_device_info->bcr
1705 * - &i3c_device_info->dcr
1706 * - &i3c_device_info->pid
1707 * - &i3c_device_info->hdr_cap if %I3C_BCR_HDR_CAP bit is set in
1708 * &i3c_device_info->bcr
1713 * information can be checked, but we can at least make sure @info->dyn_addr
1714 * and @info->bcr are correct), -EINVAL otherwise.
1722 if (!i3c_bus_dev_addr_is_avail(&master->bus, info->dyn_addr)) in i3c_master_set_info()
1723 return -EINVAL; in i3c_master_set_info()
1725 if (I3C_BCR_DEVICE_ROLE(info->bcr) == I3C_BCR_I3C_MASTER && in i3c_master_set_info()
1726 master->secondary) in i3c_master_set_info()
1727 return -EINVAL; in i3c_master_set_info()
1729 if (master->this) in i3c_master_set_info()
1730 return -EINVAL; in i3c_master_set_info()
1736 master->this = i3cdev; in i3c_master_set_info()
1737 master->bus.cur_master = master->this; in i3c_master_set_info()
1757 list_for_each_entry_safe(i3cdev, i3ctmp, &master->bus.devs.i3c, in i3c_master_detach_free_devs()
1761 if (i3cdev->boardinfo && i3cdev->boardinfo->init_dyn_addr) in i3c_master_detach_free_devs()
1762 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_detach_free_devs()
1763 i3cdev->boardinfo->init_dyn_addr, in i3c_master_detach_free_devs()
1769 list_for_each_entry_safe(i2cdev, i2ctmp, &master->bus.devs.i2c, in i3c_master_detach_free_devs()
1772 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_detach_free_devs()
1773 i2cdev->addr, in i3c_master_detach_free_devs()
1780 * i3c_master_bus_init() - initialize an I3C bus
1783 * This function is following all initialisation steps described in the I3C
1789 * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
1799 * 5. Reserve address slots for I3C devices with init_dyn_addr. And if devices
1800 * also have static_addr, try to pre-assign dynamic addresses requested by
1801 * the FW with SETDASA and attach corresponding statically defined I3C
1805 * remaining I3C devices
1807 * Once this is done, all I3C and I2C devices should be usable.
1823 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) { in i3c_master_bus_init()
1824 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_bus_init()
1825 i2cboardinfo->base.addr); in i3c_master_bus_init()
1827 ret = -EBUSY; in i3c_master_bus_init()
1831 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_bus_init()
1832 i2cboardinfo->base.addr, in i3c_master_bus_init()
1836 i2cboardinfo->base.addr, in i3c_master_bus_init()
1837 i2cboardinfo->lvr); in i3c_master_bus_init()
1851 * Now execute the controller specific ->bus_init() routine, which in i3c_master_bus_init()
1854 ret = master->ops->bus_init(master); in i3c_master_bus_init()
1859 * The master device should have been instantiated in ->bus_init(), in i3c_master_bus_init()
1862 if (!master->this) { in i3c_master_bus_init()
1863 dev_err(&master->dev, in i3c_master_bus_init()
1864 "master_set_info() was not called in ->bus_init()\n"); in i3c_master_bus_init()
1865 ret = -EINVAL; in i3c_master_bus_init()
1885 * Reserve init_dyn_addr first, and then try to pre-assign dynamic in i3c_master_bus_init()
1887 * In case pre-assign dynamic address fails, setting dynamic address to in i3c_master_bus_init()
1891 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) { in i3c_master_bus_init()
1897 if (!i3cboardinfo->init_dyn_addr) in i3c_master_bus_init()
1900 ret = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_bus_init()
1901 i3cboardinfo->init_dyn_addr); in i3c_master_bus_init()
1903 ret = -EBUSY; in i3c_master_bus_init()
1907 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_bus_init()
1908 i3cboardinfo->init_dyn_addr, in i3c_master_bus_init()
1919 if (i3cboardinfo->static_addr) in i3c_master_bus_init()
1933 if (master->ops->bus_cleanup) in i3c_master_bus_init()
1934 master->ops->bus_cleanup(master); in i3c_master_bus_init()
1944 if (master->ops->bus_cleanup) in i3c_master_bus_cleanup()
1945 master->ops->bus_cleanup(master); in i3c_master_bus_cleanup()
1952 struct i3c_master_controller *master = i3cdev->common.master; in i3c_master_attach_boardinfo()
1955 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) { in i3c_master_attach_boardinfo()
1956 if (i3cdev->info.pid != i3cboardinfo->pid) in i3c_master_attach_boardinfo()
1959 i3cdev->boardinfo = i3cboardinfo; in i3c_master_attach_boardinfo()
1960 i3cdev->info.static_addr = i3cboardinfo->static_addr; in i3c_master_attach_boardinfo()
1971 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) { in i3c_master_search_i3c_dev_duplicate()
1972 if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid) in i3c_master_search_i3c_dev_duplicate()
1980 * i3c_master_add_i3c_dev_locked() - add an I3C slave to the bus
1982 * @addr: I3C slave dynamic address assigned to the device
1984 * This function is instantiating an I3C device object and adding it to the
1985 * I3C device list. All device information are automatically retrieved using
1988 * The I3C device object is returned in case the master wants to attach
2006 return -EINVAL; in i3c_master_add_i3c_dev_locked()
2024 newdev->dev = olddev->dev; in i3c_master_add_i3c_dev_locked()
2025 if (newdev->dev) in i3c_master_add_i3c_dev_locked()
2026 newdev->dev->desc = newdev; in i3c_master_add_i3c_dev_locked()
2034 mutex_lock(&olddev->ibi_lock); in i3c_master_add_i3c_dev_locked()
2035 if (olddev->ibi) { in i3c_master_add_i3c_dev_locked()
2036 ibireq.handler = olddev->ibi->handler; in i3c_master_add_i3c_dev_locked()
2037 ibireq.max_payload_len = olddev->ibi->max_payload_len; in i3c_master_add_i3c_dev_locked()
2038 ibireq.num_slots = olddev->ibi->num_slots; in i3c_master_add_i3c_dev_locked()
2040 if (olddev->ibi->enabled) { in i3c_master_add_i3c_dev_locked()
2047 mutex_unlock(&olddev->ibi_lock); in i3c_master_add_i3c_dev_locked()
2049 old_dyn_addr = olddev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
2058 * - if the device already had a dynamic address assigned, let's try to in i3c_master_add_i3c_dev_locked()
2059 * re-apply this one in i3c_master_add_i3c_dev_locked()
2060 * - if the device did not have a dynamic address and the firmware in i3c_master_add_i3c_dev_locked()
2062 * - in any other case, keep the address automatically assigned by the in i3c_master_add_i3c_dev_locked()
2065 if (old_dyn_addr && old_dyn_addr != newdev->info.dyn_addr) in i3c_master_add_i3c_dev_locked()
2067 else if (newdev->boardinfo && newdev->boardinfo->init_dyn_addr) in i3c_master_add_i3c_dev_locked()
2068 expected_dyn_addr = newdev->boardinfo->init_dyn_addr; in i3c_master_add_i3c_dev_locked()
2070 expected_dyn_addr = newdev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
2072 if (newdev->info.dyn_addr != expected_dyn_addr) { in i3c_master_add_i3c_dev_locked()
2078 newdev->info.dyn_addr, in i3c_master_add_i3c_dev_locked()
2081 old_dyn_addr = newdev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
2082 newdev->info.dyn_addr = expected_dyn_addr; in i3c_master_add_i3c_dev_locked()
2085 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
2087 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
2099 mutex_lock(&newdev->ibi_lock); in i3c_master_add_i3c_dev_locked()
2102 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
2103 "Failed to request IBI on device %d-%llx", in i3c_master_add_i3c_dev_locked()
2104 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
2108 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
2109 "Failed to re-enable IBI on device %d-%llx", in i3c_master_add_i3c_dev_locked()
2110 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
2112 mutex_unlock(&newdev->ibi_lock); in i3c_master_add_i3c_dev_locked()
2118 if (newdev->dev && newdev->dev->desc) in i3c_master_add_i3c_dev_locked()
2119 newdev->dev->desc = NULL; in i3c_master_add_i3c_dev_locked()
2137 struct device *dev = &master->dev; in of_i3c_master_add_i2c_boardinfo()
2142 return -ENOMEM; in of_i3c_master_add_i2c_boardinfo()
2144 ret = of_i2c_get_board_info(dev, node, &boardinfo->base); in of_i3c_master_add_i2c_boardinfo()
2149 * The I3C Specification does not clearly say I2C devices with 10-bit in of_i3c_master_add_i2c_boardinfo()
2153 if (boardinfo->base.flags & I2C_CLIENT_TEN) { in of_i3c_master_add_i2c_boardinfo()
2155 return -ENOTSUPP; in of_i3c_master_add_i2c_boardinfo()
2159 boardinfo->lvr = reg[2]; in of_i3c_master_add_i2c_boardinfo()
2161 list_add_tail(&boardinfo->node, &master->boardinfo.i2c); in of_i3c_master_add_i2c_boardinfo()
2172 struct device *dev = &master->dev; in of_i3c_master_add_i3c_boardinfo()
2178 return -ENOMEM; in of_i3c_master_add_i3c_boardinfo()
2182 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2184 addrstatus = i3c_bus_get_addr_slot_status(&master->bus, in of_i3c_master_add_i3c_boardinfo()
2187 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2190 boardinfo->static_addr = reg[0]; in of_i3c_master_add_i3c_boardinfo()
2192 if (!of_property_read_u32(node, "assigned-address", &init_dyn_addr)) { in of_i3c_master_add_i3c_boardinfo()
2194 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2196 addrstatus = i3c_bus_get_addr_slot_status(&master->bus, in of_i3c_master_add_i3c_boardinfo()
2199 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2202 boardinfo->pid = ((u64)reg[1] << 32) | reg[2]; in of_i3c_master_add_i3c_boardinfo()
2204 if ((boardinfo->pid & GENMASK_ULL(63, 48)) || in of_i3c_master_add_i3c_boardinfo()
2205 I3C_PID_RND_LOWER_32BITS(boardinfo->pid)) in of_i3c_master_add_i3c_boardinfo()
2206 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2208 boardinfo->init_dyn_addr = init_dyn_addr; in of_i3c_master_add_i3c_boardinfo()
2209 boardinfo->of_node = of_node_get(node); in of_i3c_master_add_i3c_boardinfo()
2210 list_add_tail(&boardinfo->node, &master->boardinfo.i3c); in of_i3c_master_add_i3c_boardinfo()
2222 return -EINVAL; in of_i3c_master_add_dev()
2242 struct device *dev = &master->dev; in of_populate_i3c_bus()
2243 struct device_node *i3cbus_np = dev->of_node; in of_populate_i3c_bus()
2260 * The user might want to limit I2C and I3C speed in case some devices in of_populate_i3c_bus()
2264 if (!of_property_read_u32(i3cbus_np, "i2c-scl-hz", &val)) in of_populate_i3c_bus()
2265 master->bus.scl_rate.i2c = val; in of_populate_i3c_bus()
2267 if (!of_property_read_u32(i3cbus_np, "i3c-scl-hz", &val)) in of_populate_i3c_bus()
2268 master->bus.scl_rate.i3c = val; in of_populate_i3c_bus()
2282 return -EINVAL; in i3c_master_i2c_adapter_xfer()
2284 if (!master->ops->i2c_xfers) in i3c_master_i2c_adapter_xfer()
2285 return -ENOTSUPP; in i3c_master_i2c_adapter_xfer()
2291 return -ENOTSUPP; in i3c_master_i2c_adapter_xfer()
2294 i3c_bus_normaluse_lock(&master->bus); in i3c_master_i2c_adapter_xfer()
2297 ret = -ENOENT; in i3c_master_i2c_adapter_xfer()
2299 ret = master->ops->i2c_xfers(dev, xfers, nxfers); in i3c_master_i2c_adapter_xfer()
2300 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_i2c_adapter_xfer()
2315 if (client->dev.of_node) { in i3c_master_i2c_get_lvr()
2318 if (!of_property_read_u32_array(client->dev.of_node, "reg", in i3c_master_i2c_get_lvr()
2334 if (i3c_master_find_i2c_dev_by_addr(master, client->addr)) in i3c_master_i2c_attach()
2337 status = i3c_bus_get_addr_slot_status(&master->bus, client->addr); in i3c_master_i2c_attach()
2339 return -EBUSY; in i3c_master_i2c_attach()
2341 i3c_bus_set_addr_slot_status(&master->bus, client->addr, in i3c_master_i2c_attach()
2344 i2cdev = i3c_master_alloc_i2c_dev(master, client->addr, in i3c_master_i2c_attach()
2360 i3c_bus_set_addr_slot_status(&master->bus, client->addr, in i3c_master_i2c_attach()
2371 dev = i3c_master_find_i2c_dev_by_addr(master, client->addr); in i3c_master_i2c_detach()
2373 return -ENODEV; in i3c_master_i2c_detach()
2376 i3c_bus_set_addr_slot_status(&master->bus, dev->addr, in i3c_master_i2c_detach()
2397 if (dev->type != &i2c_client_type) in i3c_i2c_notifier_call()
2401 adap = client->adapter; in i3c_i2c_notifier_call()
2403 if (adap->algo != &i3c_master_i2c_algo) in i3c_i2c_notifier_call()
2408 i3c_bus_maintenance_lock(&master->bus); in i3c_i2c_notifier_call()
2417 i3c_bus_maintenance_unlock(&master->bus); in i3c_i2c_notifier_call()
2433 adap->dev.parent = master->dev.parent; in i3c_master_i2c_adapter_init()
2434 adap->owner = master->dev.parent->driver->owner; in i3c_master_i2c_adapter_init()
2435 adap->algo = &i3c_master_i2c_algo; in i3c_master_i2c_adapter_init()
2436 strscpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name)); in i3c_master_i2c_adapter_init()
2438 /* FIXME: Should we allow i3c masters to override these values? */ in i3c_master_i2c_adapter_init()
2439 adap->timeout = 1000; in i3c_master_i2c_adapter_init()
2440 adap->retries = 3; in i3c_master_i2c_adapter_init()
2450 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) { in i3c_master_i2c_adapter_init()
2452 i2cboardinfo->base.addr); in i3c_master_i2c_adapter_init()
2455 i2cdev->dev = i2c_new_client_device(adap, &i2cboardinfo->base); in i3c_master_i2c_adapter_init()
2465 i2c_del_adapter(&master->i2c); in i3c_master_i2c_adapter_cleanup()
2467 i3c_bus_for_each_i2cdev(&master->bus, i2cdev) in i3c_master_i2c_adapter_cleanup()
2468 i2cdev->dev = NULL; in i3c_master_i2c_adapter_cleanup()
2475 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) { in i3c_master_unregister_i3c_devs()
2476 if (!i3cdev->dev) in i3c_master_unregister_i3c_devs()
2479 i3cdev->dev->desc = NULL; in i3c_master_unregister_i3c_devs()
2480 if (device_is_registered(&i3cdev->dev->dev)) in i3c_master_unregister_i3c_devs()
2481 device_unregister(&i3cdev->dev->dev); in i3c_master_unregister_i3c_devs()
2483 put_device(&i3cdev->dev->dev); in i3c_master_unregister_i3c_devs()
2484 i3cdev->dev = NULL; in i3c_master_unregister_i3c_devs()
2489 * i3c_master_queue_ibi() - Queue an IBI
2498 atomic_inc(&dev->ibi->pending_ibis); in i3c_master_queue_ibi()
2499 queue_work(dev->ibi->wq, &slot->work); in i3c_master_queue_ibi()
2507 struct i3c_dev_desc *dev = slot->dev; in i3c_master_handle_ibi()
2511 payload.data = slot->data; in i3c_master_handle_ibi()
2512 payload.len = slot->len; in i3c_master_handle_ibi()
2514 if (dev->dev) in i3c_master_handle_ibi()
2515 dev->ibi->handler(dev->dev, &payload); in i3c_master_handle_ibi()
2517 master->ops->recycle_ibi_slot(dev, slot); in i3c_master_handle_ibi()
2518 if (atomic_dec_and_test(&dev->ibi->pending_ibis)) in i3c_master_handle_ibi()
2519 complete(&dev->ibi->all_ibis_handled); in i3c_master_handle_ibi()
2525 slot->dev = dev; in i3c_master_init_ibi_slot()
2526 INIT_WORK(&slot->work, i3c_master_handle_ibi); in i3c_master_init_ibi_slot()
2544 * i3c_generic_ibi_free_pool() - Free a generic IBI pool
2554 while (!list_empty(&pool->free_slots)) { in i3c_generic_ibi_free_pool()
2555 slot = list_first_entry(&pool->free_slots, in i3c_generic_ibi_free_pool()
2557 list_del(&slot->node); in i3c_generic_ibi_free_pool()
2565 WARN_ON(nslots != pool->num_slots); in i3c_generic_ibi_free_pool()
2567 kfree(pool->payload_buf); in i3c_generic_ibi_free_pool()
2568 kfree(pool->slots); in i3c_generic_ibi_free_pool()
2574 * i3c_generic_ibi_alloc_pool() - Create a generic IBI pool
2593 return ERR_PTR(-ENOMEM); in i3c_generic_ibi_alloc_pool()
2595 spin_lock_init(&pool->lock); in i3c_generic_ibi_alloc_pool()
2596 INIT_LIST_HEAD(&pool->free_slots); in i3c_generic_ibi_alloc_pool()
2597 INIT_LIST_HEAD(&pool->pending); in i3c_generic_ibi_alloc_pool()
2599 pool->slots = kcalloc(req->num_slots, sizeof(*slot), GFP_KERNEL); in i3c_generic_ibi_alloc_pool()
2600 if (!pool->slots) { in i3c_generic_ibi_alloc_pool()
2601 ret = -ENOMEM; in i3c_generic_ibi_alloc_pool()
2605 if (req->max_payload_len) { in i3c_generic_ibi_alloc_pool()
2606 pool->payload_buf = kcalloc(req->num_slots, in i3c_generic_ibi_alloc_pool()
2607 req->max_payload_len, GFP_KERNEL); in i3c_generic_ibi_alloc_pool()
2608 if (!pool->payload_buf) { in i3c_generic_ibi_alloc_pool()
2609 ret = -ENOMEM; in i3c_generic_ibi_alloc_pool()
2614 for (i = 0; i < req->num_slots; i++) { in i3c_generic_ibi_alloc_pool()
2615 slot = &pool->slots[i]; in i3c_generic_ibi_alloc_pool()
2616 i3c_master_init_ibi_slot(dev, &slot->base); in i3c_generic_ibi_alloc_pool()
2618 if (req->max_payload_len) in i3c_generic_ibi_alloc_pool()
2619 slot->base.data = pool->payload_buf + in i3c_generic_ibi_alloc_pool()
2620 (i * req->max_payload_len); in i3c_generic_ibi_alloc_pool()
2622 list_add_tail(&slot->node, &pool->free_slots); in i3c_generic_ibi_alloc_pool()
2623 pool->num_slots++; in i3c_generic_ibi_alloc_pool()
2635 * i3c_generic_ibi_get_free_slot() - Get a free slot from a generic IBI pool
2650 spin_lock_irqsave(&pool->lock, flags); in i3c_generic_ibi_get_free_slot()
2651 slot = list_first_entry_or_null(&pool->free_slots, in i3c_generic_ibi_get_free_slot()
2654 list_del(&slot->node); in i3c_generic_ibi_get_free_slot()
2655 spin_unlock_irqrestore(&pool->lock, flags); in i3c_generic_ibi_get_free_slot()
2657 return slot ? &slot->base : NULL; in i3c_generic_ibi_get_free_slot()
2662 * i3c_generic_ibi_recycle_slot() - Return a slot to a generic IBI pool
2667 * master driver struct_master_controller_ops->recycle_ibi() method.
2679 spin_lock_irqsave(&pool->lock, flags); in i3c_generic_ibi_recycle_slot()
2680 list_add_tail(&slot->node, &pool->free_slots); in i3c_generic_ibi_recycle_slot()
2681 spin_unlock_irqrestore(&pool->lock, flags); in i3c_generic_ibi_recycle_slot()
2687 if (!ops || !ops->bus_init || !ops->priv_xfers || in i3c_master_check_ops()
2688 !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers) in i3c_master_check_ops()
2689 return -EINVAL; in i3c_master_check_ops()
2691 if (ops->request_ibi && in i3c_master_check_ops()
2692 (!ops->enable_ibi || !ops->disable_ibi || !ops->free_ibi || in i3c_master_check_ops()
2693 !ops->recycle_ibi_slot)) in i3c_master_check_ops()
2694 return -EINVAL; in i3c_master_check_ops()
2700 * i3c_master_register() - register an I3C master
2702 * @parent: the parent device (the one that provides this I3C master
2706 * -ENOTSUPP if set to true since secondary masters are not yet
2711 * - creates and initializes the I3C bus
2712 * - populates the bus with static I2C devs if @parent->of_node is not
2714 * - registers all I3C devices added by the controller during bus
2716 * - registers the I2C adapter and all I2C devices
2733 return -ENOTSUPP; in i3c_master_register()
2739 master->dev.parent = parent; in i3c_master_register()
2740 master->dev.of_node = of_node_get(parent->of_node); in i3c_master_register()
2741 master->dev.bus = &i3c_bus_type; in i3c_master_register()
2742 master->dev.type = &i3c_masterdev_type; in i3c_master_register()
2743 master->dev.release = i3c_masterdev_release; in i3c_master_register()
2744 master->ops = ops; in i3c_master_register()
2745 master->secondary = secondary; in i3c_master_register()
2746 INIT_LIST_HEAD(&master->boardinfo.i2c); in i3c_master_register()
2747 INIT_LIST_HEAD(&master->boardinfo.i3c); in i3c_master_register()
2749 ret = i3c_bus_init(i3cbus, master->dev.of_node); in i3c_master_register()
2753 device_initialize(&master->dev); in i3c_master_register()
2754 dev_set_name(&master->dev, "i3c-%d", i3cbus->id); in i3c_master_register()
2756 master->dev.dma_mask = parent->dma_mask; in i3c_master_register()
2757 master->dev.coherent_dma_mask = parent->coherent_dma_mask; in i3c_master_register()
2758 master->dev.dma_parms = parent->dma_parms; in i3c_master_register()
2764 list_for_each_entry(i2cbi, &master->boardinfo.i2c, node) { in i3c_master_register()
2765 switch (i2cbi->lvr & I3C_LVR_I2C_INDEX_MASK) { in i3c_master_register()
2779 ret = -EINVAL; in i3c_master_register()
2783 if (i2cbi->lvr & I3C_LVR_I2C_FM_MODE) in i3c_master_register()
2791 master->wq = alloc_workqueue("%s", 0, 0, dev_name(parent)); in i3c_master_register()
2792 if (!master->wq) { in i3c_master_register()
2793 ret = -ENOMEM; in i3c_master_register()
2801 ret = device_add(&master->dev); in i3c_master_register()
2806 * Expose our I3C bus as an I2C adapter so that I2C devices are exposed in i3c_master_register()
2817 * register I3C devices discovered during the initial DAA. in i3c_master_register()
2819 master->init_done = true; in i3c_master_register()
2820 i3c_bus_normaluse_lock(&master->bus); in i3c_master_register()
2822 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_register()
2827 device_del(&master->dev); in i3c_master_register()
2833 put_device(&master->dev); in i3c_master_register()
2840 * i3c_master_unregister() - unregister an I3C master
2847 i3c_bus_notify(&master->bus, I3C_NOTIFY_BUS_REMOVE); in i3c_master_unregister()
2852 device_unregister(&master->dev); in i3c_master_unregister()
2861 return -ENOENT; in i3c_dev_setdasa_locked()
2865 return -EINVAL; in i3c_dev_setdasa_locked()
2867 if (!dev->boardinfo || !dev->boardinfo->init_dyn_addr || in i3c_dev_setdasa_locked()
2868 !dev->boardinfo->static_addr) in i3c_dev_setdasa_locked()
2869 return -EINVAL; in i3c_dev_setdasa_locked()
2871 return i3c_master_setdasa_locked(master, dev->info.static_addr, in i3c_dev_setdasa_locked()
2872 dev->boardinfo->init_dyn_addr); in i3c_dev_setdasa_locked()
2882 return -ENOENT; in i3c_dev_do_priv_xfers_locked()
2886 return -EINVAL; in i3c_dev_do_priv_xfers_locked()
2888 if (!master->ops->priv_xfers) in i3c_dev_do_priv_xfers_locked()
2889 return -ENOTSUPP; in i3c_dev_do_priv_xfers_locked()
2891 return master->ops->priv_xfers(dev, xfers, nxfers); in i3c_dev_do_priv_xfers_locked()
2899 if (!dev->ibi) in i3c_dev_disable_ibi_locked()
2900 return -EINVAL; in i3c_dev_disable_ibi_locked()
2903 ret = master->ops->disable_ibi(dev); in i3c_dev_disable_ibi_locked()
2907 reinit_completion(&dev->ibi->all_ibis_handled); in i3c_dev_disable_ibi_locked()
2908 if (atomic_read(&dev->ibi->pending_ibis)) in i3c_dev_disable_ibi_locked()
2909 wait_for_completion(&dev->ibi->all_ibis_handled); in i3c_dev_disable_ibi_locked()
2911 dev->ibi->enabled = false; in i3c_dev_disable_ibi_locked()
2921 if (!dev->ibi) in i3c_dev_enable_ibi_locked()
2922 return -EINVAL; in i3c_dev_enable_ibi_locked()
2924 ret = master->ops->enable_ibi(dev); in i3c_dev_enable_ibi_locked()
2926 dev->ibi->enabled = true; in i3c_dev_enable_ibi_locked()
2938 if (!master->ops->request_ibi) in i3c_dev_request_ibi_locked()
2939 return -ENOTSUPP; in i3c_dev_request_ibi_locked()
2941 if (dev->ibi) in i3c_dev_request_ibi_locked()
2942 return -EBUSY; in i3c_dev_request_ibi_locked()
2946 return -ENOMEM; in i3c_dev_request_ibi_locked()
2948 ibi->wq = alloc_ordered_workqueue(dev_name(i3cdev_to_dev(dev->dev)), WQ_MEM_RECLAIM); in i3c_dev_request_ibi_locked()
2949 if (!ibi->wq) { in i3c_dev_request_ibi_locked()
2951 return -ENOMEM; in i3c_dev_request_ibi_locked()
2954 atomic_set(&ibi->pending_ibis, 0); in i3c_dev_request_ibi_locked()
2955 init_completion(&ibi->all_ibis_handled); in i3c_dev_request_ibi_locked()
2956 ibi->handler = req->handler; in i3c_dev_request_ibi_locked()
2957 ibi->max_payload_len = req->max_payload_len; in i3c_dev_request_ibi_locked()
2958 ibi->num_slots = req->num_slots; in i3c_dev_request_ibi_locked()
2960 dev->ibi = ibi; in i3c_dev_request_ibi_locked()
2961 ret = master->ops->request_ibi(dev, req); in i3c_dev_request_ibi_locked()
2964 dev->ibi = NULL; in i3c_dev_request_ibi_locked()
2974 if (!dev->ibi) in i3c_dev_free_ibi_locked()
2977 if (WARN_ON(dev->ibi->enabled)) in i3c_dev_free_ibi_locked()
2980 master->ops->free_ibi(dev); in i3c_dev_free_ibi_locked()
2982 if (dev->ibi->wq) { in i3c_dev_free_ibi_locked()
2983 destroy_workqueue(dev->ibi->wq); in i3c_dev_free_ibi_locked()
2984 dev->ibi->wq = NULL; in i3c_dev_free_ibi_locked()
2987 kfree(dev->ibi); in i3c_dev_free_ibi_locked()
2988 dev->ibi = NULL; in i3c_dev_free_ibi_locked()
2995 res = of_alias_get_highest_id("i3c"); in i3c_init()
3028 MODULE_DESCRIPTION("I3C core");