Lines Matching +full:i3c +full:- +full:scl +full:- +full:hz
1 // SPDX-License-Identifier: GPL-2.0
26 * i3c_bus_maintenance_lock - Lock the bus for a maintenance operation
27 * @bus: I3C bus to take the lock on
31 * - enabling/disabling slave events
32 * - re-triggering DAA
33 * - changing the dynamic address of a device
34 * - relinquishing mastership
35 * - ...
38 * logic to rely on I3C device information that could be changed behind their
43 down_write(&bus->lock); in i3c_bus_maintenance_lock()
47 * i3c_bus_maintenance_unlock - Release the bus lock after a maintenance
49 * @bus: I3C bus to release the lock on
57 up_write(&bus->lock); in i3c_bus_maintenance_unlock()
61 * i3c_bus_normaluse_lock - Lock the bus for a normal operation
62 * @bus: I3C bus to take the lock on
65 * operation (see i3c_bus_maintenance_lock() for a non-exhaustive list of
66 * maintenance operations). Basically all communications with I3C devices are
68 * state or I3C dynamic address).
71 * In other words, transfer requests passed to the I3C master can be submitted
72 * in parallel and I3C master drivers have to use their own locking to make
73 * sure two different communications are not inter-mixed, or access to the
78 down_read(&bus->lock); in i3c_bus_normaluse_lock()
82 * i3c_bus_normaluse_unlock - Release the bus lock after a normal operation
83 * @bus: I3C bus to release the lock on
91 up_read(&bus->lock); in i3c_bus_normaluse_unlock()
111 if (dev->type == &i3c_device_type) in dev_to_i3cbus()
112 return dev_to_i3cdev(dev)->bus; in dev_to_i3cbus()
116 return &master->bus; in dev_to_i3cbus()
123 if (dev->type == &i3c_device_type) in dev_to_i3cdesc()
124 return dev_to_i3cdev(dev)->desc; in dev_to_i3cdesc()
128 return master->this; in dev_to_i3cdesc()
141 ret = sprintf(buf, "%x\n", desc->info.bcr); in bcr_show()
158 ret = sprintf(buf, "%x\n", desc->info.dcr); in dcr_show()
175 ret = sprintf(buf, "%llx\n", desc->info.pid); in pid_show()
192 ret = sprintf(buf, "%02x\n", desc->info.dyn_addr); in dynamic_address_show()
200 "hdr-ddr", "hdr-tsp", "hdr-tsl",
215 caps = desc->info.hdr_cap; in hdrcap_show()
247 struct i3c_device *i3c = dev_to_i3cdev(dev); in modalias_show() local
251 i3c_device_get_info(i3c, &devinfo); in modalias_show()
257 return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr, in modalias_show()
260 return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X", in modalias_show()
288 return add_uevent_var(env, "MODALIAS=i3c:dcr%02Xmanuf%04X", in i3c_device_uevent()
292 "MODALIAS=i3c:dcr%02Xmanuf%04Xpart%04Xext%04X", in i3c_device_uevent()
306 if (dev->type != &i3c_device_type) in i3c_device_match()
311 if (i3c_device_match_id(i3cdev, i3cdrv->id_table)) in i3c_device_match()
320 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver); in i3c_device_probe()
322 return driver->probe(i3cdev); in i3c_device_probe()
328 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver); in i3c_device_remove()
330 if (driver->remove) in i3c_device_remove()
331 driver->remove(i3cdev); in i3c_device_remove()
337 .name = "i3c",
352 status = bus->addrslots[bitpos / BITS_PER_LONG]; in i3c_bus_get_addr_slot_status()
367 ptr = bus->addrslots + (bitpos / BITS_PER_LONG); in i3c_bus_set_addr_slot_status()
393 return -ENOMEM; in i3c_bus_get_free_addr()
418 idr_remove(&i3c_bus_idr, i3cbus->id); in i3c_bus_cleanup()
426 init_rwsem(&i3cbus->lock); in i3c_bus_init()
427 INIT_LIST_HEAD(&i3cbus->devs.i2c); in i3c_bus_init()
428 INIT_LIST_HEAD(&i3cbus->devs.i3c); in i3c_bus_init()
430 i3cbus->mode = I3C_BUS_MODE_PURE; in i3c_bus_init()
439 i3cbus->id = ret; in i3c_bus_init()
446 [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
447 [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited",
448 [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow",
459 if (i3cbus->mode < 0 || in mode_show()
460 i3cbus->mode >= ARRAY_SIZE(i3c_bus_mode_strings) || in mode_show()
461 !i3c_bus_mode_strings[i3cbus->mode]) in mode_show()
464 ret = sprintf(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]); in mode_show()
479 ret = sprintf(buf, "%d-%llx\n", i3cbus->id, in current_master_show()
480 i3cbus->cur_master->info.pid); in current_master_show()
495 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i3c); in i3c_scl_frequency_show()
510 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i2c); in i2c_scl_frequency_show()
536 if (master->wq) in i3c_masterdev_release()
537 destroy_workqueue(master->wq); in i3c_masterdev_release()
539 WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c)); in i3c_masterdev_release()
542 of_node_put(dev->of_node); in i3c_masterdev_release()
554 i3cbus->mode = mode; in i3c_bus_set_mode()
556 switch (i3cbus->mode) { in i3c_bus_set_mode()
558 if (!i3cbus->scl_rate.i3c) in i3c_bus_set_mode()
559 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; in i3c_bus_set_mode()
563 if (!i3cbus->scl_rate.i3c) in i3c_bus_set_mode()
564 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; in i3c_bus_set_mode()
565 if (!i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
566 i3cbus->scl_rate.i2c = max_i2c_scl_rate; in i3c_bus_set_mode()
569 if (!i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
570 i3cbus->scl_rate.i2c = max_i2c_scl_rate; in i3c_bus_set_mode()
571 if (!i3cbus->scl_rate.i3c || in i3c_bus_set_mode()
572 i3cbus->scl_rate.i3c > i3cbus->scl_rate.i2c) in i3c_bus_set_mode()
573 i3cbus->scl_rate.i3c = i3cbus->scl_rate.i2c; in i3c_bus_set_mode()
576 return -EINVAL; in i3c_bus_set_mode()
579 dev_dbg(&master->dev, "i2c-scl = %ld Hz i3c-scl = %ld Hz\n", in i3c_bus_set_mode()
580 i3cbus->scl_rate.i2c, i3cbus->scl_rate.i3c); in i3c_bus_set_mode()
583 * I3C/I2C frequency may have been overridden, check that user-provided in i3c_bus_set_mode()
586 if (i3cbus->scl_rate.i3c > I3C_BUS_MAX_I3C_SCL_RATE || in i3c_bus_set_mode()
587 i3cbus->scl_rate.i2c > I3C_BUS_I2C_FM_PLUS_SCL_RATE) in i3c_bus_set_mode()
588 return -EINVAL; in i3c_bus_set_mode()
602 return &master->i2c; in i3c_master_to_i2c_adapter()
618 return ERR_PTR(-ENOMEM); in i3c_master_alloc_i2c_dev()
620 dev->common.master = master; in i3c_master_alloc_i2c_dev()
621 dev->addr = addr; in i3c_master_alloc_i2c_dev()
622 dev->lvr = lvr; in i3c_master_alloc_i2c_dev()
630 dest->addr = addr; in i3c_ccc_cmd_dest_init()
631 dest->payload.len = payloadlen; in i3c_ccc_cmd_dest_init()
633 dest->payload.data = kzalloc(payloadlen, GFP_KERNEL); in i3c_ccc_cmd_dest_init()
635 dest->payload.data = NULL; in i3c_ccc_cmd_dest_init()
637 return dest->payload.data; in i3c_ccc_cmd_dest_init()
642 kfree(dest->payload.data); in i3c_ccc_cmd_dest_cleanup()
649 cmd->rnw = rnw ? 1 : 0; in i3c_ccc_cmd_init()
650 cmd->id = id; in i3c_ccc_cmd_init()
651 cmd->dests = dests; in i3c_ccc_cmd_init()
652 cmd->ndests = ndests; in i3c_ccc_cmd_init()
653 cmd->err = I3C_ERROR_UNKNOWN; in i3c_ccc_cmd_init()
662 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
664 if (WARN_ON(master->init_done && in i3c_master_send_ccc_cmd_locked()
665 !rwsem_is_locked(&master->bus.lock))) in i3c_master_send_ccc_cmd_locked()
666 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
668 if (!master->ops->send_ccc_cmd) in i3c_master_send_ccc_cmd_locked()
669 return -ENOTSUPP; in i3c_master_send_ccc_cmd_locked()
671 if ((cmd->id & I3C_CCC_DIRECT) && (!cmd->dests || !cmd->ndests)) in i3c_master_send_ccc_cmd_locked()
672 return -EINVAL; in i3c_master_send_ccc_cmd_locked()
674 if (master->ops->supports_ccc_cmd && in i3c_master_send_ccc_cmd_locked()
675 !master->ops->supports_ccc_cmd(master, cmd)) in i3c_master_send_ccc_cmd_locked()
676 return -ENOTSUPP; in i3c_master_send_ccc_cmd_locked()
678 ret = master->ops->send_ccc_cmd(master, cmd); in i3c_master_send_ccc_cmd_locked()
680 if (cmd->err != I3C_ERROR_UNKNOWN) in i3c_master_send_ccc_cmd_locked()
681 return cmd->err; in i3c_master_send_ccc_cmd_locked()
695 i3c_bus_for_each_i2cdev(&master->bus, dev) { in i3c_master_find_i2c_dev_by_addr()
696 if (dev->addr == addr) in i3c_master_find_i2c_dev_by_addr()
704 * i3c_master_get_free_addr() - get a free address on the bus
705 * @master: I3C master object
710 * Return: the first free address starting at @start_addr (included) or -ENOMEM
716 return i3c_bus_get_free_addr(&master->bus, start_addr); in i3c_master_get_free_addr()
724 WARN_ON(i3cdev->desc); in i3c_device_release()
726 of_node_put(i3cdev->dev.of_node); in i3c_device_release()
743 return ERR_PTR(-ENOMEM); in i3c_master_alloc_i3c_dev()
745 dev->common.master = master; in i3c_master_alloc_i3c_dev()
746 dev->info = *info; in i3c_master_alloc_i3c_dev()
747 mutex_init(&dev->ibi_lock); in i3c_master_alloc_i3c_dev()
761 return -EINVAL; in i3c_master_rstdaa_locked()
763 addrstat = i3c_bus_get_addr_slot_status(&master->bus, addr); in i3c_master_rstdaa_locked()
765 return -EINVAL; in i3c_master_rstdaa_locked()
778 * i3c_master_entdaa_locked() - start a DAA (Dynamic Address Assignment)
785 * behind dynamic address assignment has to be handled in the I3C master
790 * Return: 0 in case of success, a positive I3C error code if the error is
818 return -ENOMEM; in i3c_master_enec_disec_locked()
820 events->events = evts; in i3c_master_enec_disec_locked()
833 * i3c_master_disec_locked() - send a DISEC CCC command
835 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
843 * Return: 0 in case of success, a positive I3C error code if the error is
854 * i3c_master_enec_locked() - send an ENEC CCC command
856 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
864 * Return: 0 in case of success, a positive I3C error code if the error is
875 * i3c_master_defslvs_locked() - send a DEFSLVS CCC command
882 * This should be called after all I3C devices have been discovered (in other
884 * &i3c_master_controller_ops->bus_init().
885 * It should also be called if a master ACKed an Hot-Join request and assigned
890 * Return: 0 in case of success, a positive I3C error code if the error is
906 return -EINVAL; in i3c_master_defslvs_locked()
912 if (i3cdev == master->this) in i3c_master_defslvs_locked()
915 if (I3C_BCR_DEVICE_ROLE(i3cdev->info.bcr) == in i3c_master_defslvs_locked()
929 ndevs - 1)); in i3c_master_defslvs_locked()
931 return -ENOMEM; in i3c_master_defslvs_locked()
933 defslvs->count = ndevs; in i3c_master_defslvs_locked()
934 defslvs->master.bcr = master->this->info.bcr; in i3c_master_defslvs_locked()
935 defslvs->master.dcr = master->this->info.dcr; in i3c_master_defslvs_locked()
936 defslvs->master.dyn_addr = master->this->info.dyn_addr << 1; in i3c_master_defslvs_locked()
937 defslvs->master.static_addr = I3C_BROADCAST_ADDR << 1; in i3c_master_defslvs_locked()
939 desc = defslvs->slaves; in i3c_master_defslvs_locked()
941 desc->lvr = i2cdev->lvr; in i3c_master_defslvs_locked()
942 desc->static_addr = i2cdev->addr << 1; in i3c_master_defslvs_locked()
947 /* Skip the I3C dev representing this master. */ in i3c_master_defslvs_locked()
948 if (i3cdev == master->this) in i3c_master_defslvs_locked()
951 desc->bcr = i3cdev->info.bcr; in i3c_master_defslvs_locked()
952 desc->dcr = i3cdev->info.dcr; in i3c_master_defslvs_locked()
953 desc->dyn_addr = i3cdev->info.dyn_addr << 1; in i3c_master_defslvs_locked()
954 desc->static_addr = i3cdev->info.static_addr << 1; in i3c_master_defslvs_locked()
975 return -EINVAL; in i3c_master_setda_locked()
979 return -ENOMEM; in i3c_master_setda_locked()
981 setda->addr = newaddr << 1; in i3c_master_setda_locked()
1011 mrl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mrl)); in i3c_master_getmrl_locked()
1013 return -ENOMEM; in i3c_master_getmrl_locked()
1019 if (!(info->bcr & I3C_BCR_IBI_PAYLOAD)) in i3c_master_getmrl_locked()
1020 dest.payload.len -= 1; in i3c_master_getmrl_locked()
1029 info->max_ibi_len = mrl->ibi_len; in i3c_master_getmrl_locked()
1032 info->max_read_len = be16_to_cpu(mrl->read_len); in i3c_master_getmrl_locked()
1035 ret = -EIO; in i3c_master_getmrl_locked()
1053 mwl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mwl)); in i3c_master_getmwl_locked()
1055 return -ENOMEM; in i3c_master_getmwl_locked()
1063 ret = -EIO; in i3c_master_getmwl_locked()
1067 info->max_write_len = be16_to_cpu(mwl->len); in i3c_master_getmwl_locked()
1083 getmaxds = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, in i3c_master_getmxds_locked()
1086 return -ENOMEM; in i3c_master_getmxds_locked()
1094 ret = -EIO; in i3c_master_getmxds_locked()
1098 info->max_read_ds = getmaxds->maxrd; in i3c_master_getmxds_locked()
1099 info->max_write_ds = getmaxds->maxwr; in i3c_master_getmxds_locked()
1101 info->max_read_turnaround = getmaxds->maxrdturn[0] | in i3c_master_getmxds_locked()
1102 ((u32)getmaxds->maxrdturn[1] << 8) | in i3c_master_getmxds_locked()
1103 ((u32)getmaxds->maxrdturn[2] << 16); in i3c_master_getmxds_locked()
1119 gethdrcap = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, in i3c_master_gethdrcap_locked()
1122 return -ENOMEM; in i3c_master_gethdrcap_locked()
1130 ret = -EIO; in i3c_master_gethdrcap_locked()
1134 info->hdr_cap = gethdrcap->modes; in i3c_master_gethdrcap_locked()
1150 getpid = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getpid)); in i3c_master_getpid_locked()
1152 return -ENOMEM; in i3c_master_getpid_locked()
1159 info->pid = 0; in i3c_master_getpid_locked()
1160 for (i = 0; i < sizeof(getpid->pid); i++) { in i3c_master_getpid_locked()
1161 int sft = (sizeof(getpid->pid) - i - 1) * 8; in i3c_master_getpid_locked()
1163 info->pid |= (u64)getpid->pid[i] << sft; in i3c_master_getpid_locked()
1180 getbcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getbcr)); in i3c_master_getbcr_locked()
1182 return -ENOMEM; in i3c_master_getbcr_locked()
1189 info->bcr = getbcr->bcr; in i3c_master_getbcr_locked()
1205 getdcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getdcr)); in i3c_master_getdcr_locked()
1207 return -ENOMEM; in i3c_master_getdcr_locked()
1214 info->dcr = getdcr->dcr; in i3c_master_getdcr_locked()
1228 if (!dev->info.dyn_addr) in i3c_master_retrieve_dev_info()
1229 return -EINVAL; in i3c_master_retrieve_dev_info()
1231 slot_status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_retrieve_dev_info()
1232 dev->info.dyn_addr); in i3c_master_retrieve_dev_info()
1235 return -EINVAL; in i3c_master_retrieve_dev_info()
1237 ret = i3c_master_getpid_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1241 ret = i3c_master_getbcr_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1245 ret = i3c_master_getdcr_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1249 if (dev->info.bcr & I3C_BCR_MAX_DATA_SPEED_LIM) { in i3c_master_retrieve_dev_info()
1250 ret = i3c_master_getmxds_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1255 if (dev->info.bcr & I3C_BCR_IBI_PAYLOAD) in i3c_master_retrieve_dev_info()
1256 dev->info.max_ibi_len = 1; in i3c_master_retrieve_dev_info()
1258 i3c_master_getmrl_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1259 i3c_master_getmwl_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1261 if (dev->info.bcr & I3C_BCR_HDR_CAP) { in i3c_master_retrieve_dev_info()
1262 ret = i3c_master_gethdrcap_locked(master, &dev->info); in i3c_master_retrieve_dev_info()
1274 if (dev->info.static_addr) in i3c_master_put_i3c_addrs()
1275 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_put_i3c_addrs()
1276 dev->info.static_addr, in i3c_master_put_i3c_addrs()
1279 if (dev->info.dyn_addr) in i3c_master_put_i3c_addrs()
1280 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_put_i3c_addrs()
1283 if (dev->boardinfo && dev->boardinfo->init_dyn_addr) in i3c_master_put_i3c_addrs()
1284 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_put_i3c_addrs()
1293 if (!dev->info.static_addr && !dev->info.dyn_addr) in i3c_master_get_i3c_addrs()
1296 if (dev->info.static_addr) { in i3c_master_get_i3c_addrs()
1297 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1298 dev->info.static_addr); in i3c_master_get_i3c_addrs()
1300 return -EBUSY; in i3c_master_get_i3c_addrs()
1302 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1303 dev->info.static_addr, in i3c_master_get_i3c_addrs()
1308 * ->init_dyn_addr should have been reserved before that, so, if we're in i3c_master_get_i3c_addrs()
1309 * trying to apply a pre-reserved dynamic address, we should not try in i3c_master_get_i3c_addrs()
1312 if (dev->info.dyn_addr && in i3c_master_get_i3c_addrs()
1313 (!dev->boardinfo || in i3c_master_get_i3c_addrs()
1314 dev->boardinfo->init_dyn_addr != dev->info.dyn_addr)) { in i3c_master_get_i3c_addrs()
1315 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1316 dev->info.dyn_addr); in i3c_master_get_i3c_addrs()
1320 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr, in i3c_master_get_i3c_addrs()
1327 if (dev->info.static_addr) in i3c_master_get_i3c_addrs()
1328 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_get_i3c_addrs()
1329 dev->info.static_addr, in i3c_master_get_i3c_addrs()
1332 return -EBUSY; in i3c_master_get_i3c_addrs()
1344 if (!dev->info.static_addr && !dev->info.dyn_addr) in i3c_master_attach_i3c_dev()
1352 if (master->this != dev && master->ops->attach_i3c_dev) { in i3c_master_attach_i3c_dev()
1353 ret = master->ops->attach_i3c_dev(dev); in i3c_master_attach_i3c_dev()
1360 list_add_tail(&dev->common.node, &master->bus.devs.i3c); in i3c_master_attach_i3c_dev()
1372 if (dev->info.dyn_addr != old_dyn_addr && in i3c_master_reattach_i3c_dev()
1373 (!dev->boardinfo || in i3c_master_reattach_i3c_dev()
1374 dev->info.dyn_addr != dev->boardinfo->init_dyn_addr)) { in i3c_master_reattach_i3c_dev()
1375 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_reattach_i3c_dev()
1376 dev->info.dyn_addr); in i3c_master_reattach_i3c_dev()
1378 return -EBUSY; in i3c_master_reattach_i3c_dev()
1379 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_reattach_i3c_dev()
1380 dev->info.dyn_addr, in i3c_master_reattach_i3c_dev()
1383 i3c_bus_set_addr_slot_status(&master->bus, old_dyn_addr, in i3c_master_reattach_i3c_dev()
1387 if (master->ops->reattach_i3c_dev) { in i3c_master_reattach_i3c_dev()
1388 ret = master->ops->reattach_i3c_dev(dev, old_dyn_addr); in i3c_master_reattach_i3c_dev()
1403 if (master->this != dev && master->ops->detach_i3c_dev) in i3c_master_detach_i3c_dev()
1404 master->ops->detach_i3c_dev(dev); in i3c_master_detach_i3c_dev()
1407 list_del(&dev->common.node); in i3c_master_detach_i3c_dev()
1415 if (master->ops->attach_i2c_dev) { in i3c_master_attach_i2c_dev()
1416 ret = master->ops->attach_i2c_dev(dev); in i3c_master_attach_i2c_dev()
1421 list_add_tail(&dev->common.node, &master->bus.devs.i2c); in i3c_master_attach_i2c_dev()
1430 list_del(&dev->common.node); in i3c_master_detach_i2c_dev()
1432 if (master->ops->detach_i2c_dev) in i3c_master_detach_i2c_dev()
1433 master->ops->detach_i2c_dev(dev); in i3c_master_detach_i2c_dev()
1440 .static_addr = boardinfo->static_addr, in i3c_master_early_i3c_dev_add()
1447 return -ENOMEM; in i3c_master_early_i3c_dev_add()
1449 i3cdev->boardinfo = boardinfo; in i3c_master_early_i3c_dev_add()
1455 ret = i3c_master_setdasa_locked(master, i3cdev->info.static_addr, in i3c_master_early_i3c_dev_add()
1456 i3cdev->boardinfo->init_dyn_addr); in i3c_master_early_i3c_dev_add()
1460 i3cdev->info.dyn_addr = i3cdev->boardinfo->init_dyn_addr; in i3c_master_early_i3c_dev_add()
1472 i3c_master_rstdaa_locked(master, i3cdev->boardinfo->init_dyn_addr); in i3c_master_early_i3c_dev_add()
1487 if (!master->init_done) in i3c_master_register_new_i3c_devs()
1490 i3c_bus_for_each_i3cdev(&master->bus, desc) { in i3c_master_register_new_i3c_devs()
1491 if (desc->dev || !desc->info.dyn_addr || desc == master->this) in i3c_master_register_new_i3c_devs()
1494 desc->dev = kzalloc(sizeof(*desc->dev), GFP_KERNEL); in i3c_master_register_new_i3c_devs()
1495 if (!desc->dev) in i3c_master_register_new_i3c_devs()
1498 desc->dev->bus = &master->bus; in i3c_master_register_new_i3c_devs()
1499 desc->dev->desc = desc; in i3c_master_register_new_i3c_devs()
1500 desc->dev->dev.parent = &master->dev; in i3c_master_register_new_i3c_devs()
1501 desc->dev->dev.type = &i3c_device_type; in i3c_master_register_new_i3c_devs()
1502 desc->dev->dev.bus = &i3c_bus_type; in i3c_master_register_new_i3c_devs()
1503 desc->dev->dev.release = i3c_device_release; in i3c_master_register_new_i3c_devs()
1504 dev_set_name(&desc->dev->dev, "%d-%llx", master->bus.id, in i3c_master_register_new_i3c_devs()
1505 desc->info.pid); in i3c_master_register_new_i3c_devs()
1507 if (desc->boardinfo) in i3c_master_register_new_i3c_devs()
1508 desc->dev->dev.of_node = desc->boardinfo->of_node; in i3c_master_register_new_i3c_devs()
1510 ret = device_register(&desc->dev->dev); in i3c_master_register_new_i3c_devs()
1512 dev_err(&master->dev, in i3c_master_register_new_i3c_devs()
1513 "Failed to add I3C device (err = %d)\n", ret); in i3c_master_register_new_i3c_devs()
1518 * i3c_master_do_daa() - do a DAA (Dynamic Address Assignment)
1521 * This function is instantiating an I3C device object and adding it to the
1522 * I3C device list. All device information are automatically retrieved using
1525 * The I3C device object is returned in case the master wants to attach
1536 i3c_bus_maintenance_lock(&master->bus); in i3c_master_do_daa()
1537 ret = master->ops->do_daa(master); in i3c_master_do_daa()
1538 i3c_bus_maintenance_unlock(&master->bus); in i3c_master_do_daa()
1543 i3c_bus_normaluse_lock(&master->bus); in i3c_master_do_daa()
1545 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_do_daa()
1552 * i3c_master_set_info() - set master device information
1554 * @info: I3C device information
1557 * &i3c_master_controller_ops->bus_init().
1562 * - &i3c_device_info->dyn_addr
1563 * - &i3c_device_info->bcr
1564 * - &i3c_device_info->dcr
1565 * - &i3c_device_info->pid
1566 * - &i3c_device_info->hdr_cap if %I3C_BCR_HDR_CAP bit is set in
1567 * &i3c_device_info->bcr
1572 * information can be checked, but we can at least make sure @info->dyn_addr
1573 * and @info->bcr are correct), -EINVAL otherwise.
1581 if (!i3c_bus_dev_addr_is_avail(&master->bus, info->dyn_addr)) in i3c_master_set_info()
1582 return -EINVAL; in i3c_master_set_info()
1584 if (I3C_BCR_DEVICE_ROLE(info->bcr) == I3C_BCR_I3C_MASTER && in i3c_master_set_info()
1585 master->secondary) in i3c_master_set_info()
1586 return -EINVAL; in i3c_master_set_info()
1588 if (master->this) in i3c_master_set_info()
1589 return -EINVAL; in i3c_master_set_info()
1595 master->this = i3cdev; in i3c_master_set_info()
1596 master->bus.cur_master = master->this; in i3c_master_set_info()
1616 list_for_each_entry_safe(i3cdev, i3ctmp, &master->bus.devs.i3c, in i3c_master_detach_free_devs()
1620 if (i3cdev->boardinfo && i3cdev->boardinfo->init_dyn_addr) in i3c_master_detach_free_devs()
1621 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_detach_free_devs()
1622 i3cdev->boardinfo->init_dyn_addr, in i3c_master_detach_free_devs()
1628 list_for_each_entry_safe(i2cdev, i2ctmp, &master->bus.devs.i2c, in i3c_master_detach_free_devs()
1631 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_detach_free_devs()
1632 i2cdev->addr, in i3c_master_detach_free_devs()
1639 * i3c_master_bus_init() - initialize an I3C bus
1642 * This function is following all initialisation steps described in the I3C
1648 * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
1658 * 5. Reserve address slots for I3C devices with init_dyn_addr. And if devices
1659 * also have static_addr, try to pre-assign dynamic addresses requested by
1660 * the FW with SETDASA and attach corresponding statically defined I3C
1664 * remaining I3C devices
1666 * Once this is done, all I3C and I2C devices should be usable.
1682 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) { in i3c_master_bus_init()
1683 status = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_bus_init()
1684 i2cboardinfo->base.addr); in i3c_master_bus_init()
1686 ret = -EBUSY; in i3c_master_bus_init()
1690 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_bus_init()
1691 i2cboardinfo->base.addr, in i3c_master_bus_init()
1695 i2cboardinfo->base.addr, in i3c_master_bus_init()
1696 i2cboardinfo->lvr); in i3c_master_bus_init()
1710 * Now execute the controller specific ->bus_init() routine, which in i3c_master_bus_init()
1713 ret = master->ops->bus_init(master); in i3c_master_bus_init()
1718 * The master device should have been instantiated in ->bus_init(), in i3c_master_bus_init()
1721 if (!master->this) { in i3c_master_bus_init()
1722 dev_err(&master->dev, in i3c_master_bus_init()
1723 "master_set_info() was not called in ->bus_init()\n"); in i3c_master_bus_init()
1724 ret = -EINVAL; in i3c_master_bus_init()
1744 * Reserve init_dyn_addr first, and then try to pre-assign dynamic in i3c_master_bus_init()
1746 * In case pre-assign dynamic address fails, setting dynamic address to in i3c_master_bus_init()
1750 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) { in i3c_master_bus_init()
1756 if (!i3cboardinfo->init_dyn_addr) in i3c_master_bus_init()
1759 ret = i3c_bus_get_addr_slot_status(&master->bus, in i3c_master_bus_init()
1760 i3cboardinfo->init_dyn_addr); in i3c_master_bus_init()
1762 ret = -EBUSY; in i3c_master_bus_init()
1766 i3c_bus_set_addr_slot_status(&master->bus, in i3c_master_bus_init()
1767 i3cboardinfo->init_dyn_addr, in i3c_master_bus_init()
1778 if (i3cboardinfo->static_addr) in i3c_master_bus_init()
1792 if (master->ops->bus_cleanup) in i3c_master_bus_init()
1793 master->ops->bus_cleanup(master); in i3c_master_bus_init()
1803 if (master->ops->bus_cleanup) in i3c_master_bus_cleanup()
1804 master->ops->bus_cleanup(master); in i3c_master_bus_cleanup()
1811 struct i3c_master_controller *master = i3cdev->common.master; in i3c_master_attach_boardinfo()
1814 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) { in i3c_master_attach_boardinfo()
1815 if (i3cdev->info.pid != i3cboardinfo->pid) in i3c_master_attach_boardinfo()
1818 i3cdev->boardinfo = i3cboardinfo; in i3c_master_attach_boardinfo()
1819 i3cdev->info.static_addr = i3cboardinfo->static_addr; in i3c_master_attach_boardinfo()
1830 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) { in i3c_master_search_i3c_dev_duplicate()
1831 if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid) in i3c_master_search_i3c_dev_duplicate()
1839 * i3c_master_add_i3c_dev_locked() - add an I3C slave to the bus
1841 * @addr: I3C slave dynamic address assigned to the device
1843 * This function is instantiating an I3C device object and adding it to the
1844 * I3C device list. All device information are automatically retrieved using
1847 * The I3C device object is returned in case the master wants to attach
1865 return -EINVAL; in i3c_master_add_i3c_dev_locked()
1883 newdev->dev = olddev->dev; in i3c_master_add_i3c_dev_locked()
1884 if (newdev->dev) in i3c_master_add_i3c_dev_locked()
1885 newdev->dev->desc = newdev; in i3c_master_add_i3c_dev_locked()
1893 mutex_lock(&olddev->ibi_lock); in i3c_master_add_i3c_dev_locked()
1894 if (olddev->ibi) { in i3c_master_add_i3c_dev_locked()
1895 ibireq.handler = olddev->ibi->handler; in i3c_master_add_i3c_dev_locked()
1896 ibireq.max_payload_len = olddev->ibi->max_payload_len; in i3c_master_add_i3c_dev_locked()
1897 ibireq.num_slots = olddev->ibi->num_slots; in i3c_master_add_i3c_dev_locked()
1899 if (olddev->ibi->enabled) { in i3c_master_add_i3c_dev_locked()
1906 mutex_unlock(&olddev->ibi_lock); in i3c_master_add_i3c_dev_locked()
1908 old_dyn_addr = olddev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
1917 * - if the device already had a dynamic address assigned, let's try to in i3c_master_add_i3c_dev_locked()
1918 * re-apply this one in i3c_master_add_i3c_dev_locked()
1919 * - if the device did not have a dynamic address and the firmware in i3c_master_add_i3c_dev_locked()
1921 * - in any other case, keep the address automatically assigned by the in i3c_master_add_i3c_dev_locked()
1924 if (old_dyn_addr && old_dyn_addr != newdev->info.dyn_addr) in i3c_master_add_i3c_dev_locked()
1926 else if (newdev->boardinfo && newdev->boardinfo->init_dyn_addr) in i3c_master_add_i3c_dev_locked()
1927 expected_dyn_addr = newdev->boardinfo->init_dyn_addr; in i3c_master_add_i3c_dev_locked()
1929 expected_dyn_addr = newdev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
1931 if (newdev->info.dyn_addr != expected_dyn_addr) { in i3c_master_add_i3c_dev_locked()
1937 newdev->info.dyn_addr, in i3c_master_add_i3c_dev_locked()
1940 old_dyn_addr = newdev->info.dyn_addr; in i3c_master_add_i3c_dev_locked()
1941 newdev->info.dyn_addr = expected_dyn_addr; in i3c_master_add_i3c_dev_locked()
1944 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
1946 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
1958 mutex_lock(&newdev->ibi_lock); in i3c_master_add_i3c_dev_locked()
1961 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
1962 "Failed to request IBI on device %d-%llx", in i3c_master_add_i3c_dev_locked()
1963 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
1967 dev_err(&master->dev, in i3c_master_add_i3c_dev_locked()
1968 "Failed to re-enable IBI on device %d-%llx", in i3c_master_add_i3c_dev_locked()
1969 master->bus.id, newdev->info.pid); in i3c_master_add_i3c_dev_locked()
1971 mutex_unlock(&newdev->ibi_lock); in i3c_master_add_i3c_dev_locked()
1977 if (newdev->dev && newdev->dev->desc) in i3c_master_add_i3c_dev_locked()
1978 newdev->dev->desc = NULL; in i3c_master_add_i3c_dev_locked()
1996 struct device *dev = &master->dev; in of_i3c_master_add_i2c_boardinfo()
2001 return -ENOMEM; in of_i3c_master_add_i2c_boardinfo()
2003 ret = of_i2c_get_board_info(dev, node, &boardinfo->base); in of_i3c_master_add_i2c_boardinfo()
2008 * The I3C Specification does not clearly say I2C devices with 10-bit in of_i3c_master_add_i2c_boardinfo()
2012 if (boardinfo->base.flags & I2C_CLIENT_TEN) { in of_i3c_master_add_i2c_boardinfo()
2014 return -ENOTSUPP; in of_i3c_master_add_i2c_boardinfo()
2018 boardinfo->lvr = reg[2]; in of_i3c_master_add_i2c_boardinfo()
2020 list_add_tail(&boardinfo->node, &master->boardinfo.i2c); in of_i3c_master_add_i2c_boardinfo()
2031 struct device *dev = &master->dev; in of_i3c_master_add_i3c_boardinfo()
2037 return -ENOMEM; in of_i3c_master_add_i3c_boardinfo()
2041 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2043 addrstatus = i3c_bus_get_addr_slot_status(&master->bus, in of_i3c_master_add_i3c_boardinfo()
2046 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2049 boardinfo->static_addr = reg[0]; in of_i3c_master_add_i3c_boardinfo()
2051 if (!of_property_read_u32(node, "assigned-address", &init_dyn_addr)) { in of_i3c_master_add_i3c_boardinfo()
2053 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2055 addrstatus = i3c_bus_get_addr_slot_status(&master->bus, in of_i3c_master_add_i3c_boardinfo()
2058 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2061 boardinfo->pid = ((u64)reg[1] << 32) | reg[2]; in of_i3c_master_add_i3c_boardinfo()
2063 if ((boardinfo->pid & GENMASK_ULL(63, 48)) || in of_i3c_master_add_i3c_boardinfo()
2064 I3C_PID_RND_LOWER_32BITS(boardinfo->pid)) in of_i3c_master_add_i3c_boardinfo()
2065 return -EINVAL; in of_i3c_master_add_i3c_boardinfo()
2067 boardinfo->init_dyn_addr = init_dyn_addr; in of_i3c_master_add_i3c_boardinfo()
2068 boardinfo->of_node = of_node_get(node); in of_i3c_master_add_i3c_boardinfo()
2069 list_add_tail(&boardinfo->node, &master->boardinfo.i3c); in of_i3c_master_add_i3c_boardinfo()
2081 return -EINVAL; in of_i3c_master_add_dev()
2101 struct device *dev = &master->dev; in of_populate_i3c_bus()
2102 struct device_node *i3cbus_np = dev->of_node; in of_populate_i3c_bus()
2119 * The user might want to limit I2C and I3C speed in case some devices in of_populate_i3c_bus()
2123 if (!of_property_read_u32(i3cbus_np, "i2c-scl-hz", &val)) in of_populate_i3c_bus()
2124 master->bus.scl_rate.i2c = val; in of_populate_i3c_bus()
2126 if (!of_property_read_u32(i3cbus_np, "i3c-scl-hz", &val)) in of_populate_i3c_bus()
2127 master->bus.scl_rate.i3c = val; in of_populate_i3c_bus()
2141 return -EINVAL; in i3c_master_i2c_adapter_xfer()
2143 if (!master->ops->i2c_xfers) in i3c_master_i2c_adapter_xfer()
2144 return -ENOTSUPP; in i3c_master_i2c_adapter_xfer()
2150 return -ENOTSUPP; in i3c_master_i2c_adapter_xfer()
2153 i3c_bus_normaluse_lock(&master->bus); in i3c_master_i2c_adapter_xfer()
2156 ret = -ENOENT; in i3c_master_i2c_adapter_xfer()
2158 ret = master->ops->i2c_xfers(dev, xfers, nxfers); in i3c_master_i2c_adapter_xfer()
2159 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_i2c_adapter_xfer()
2174 if (client->dev.of_node) { in i3c_master_i2c_get_lvr()
2177 if (!of_property_read_u32_array(client->dev.of_node, "reg", in i3c_master_i2c_get_lvr()
2193 if (i3c_master_find_i2c_dev_by_addr(master, client->addr)) in i3c_master_i2c_attach()
2196 status = i3c_bus_get_addr_slot_status(&master->bus, client->addr); in i3c_master_i2c_attach()
2198 return -EBUSY; in i3c_master_i2c_attach()
2200 i3c_bus_set_addr_slot_status(&master->bus, client->addr, in i3c_master_i2c_attach()
2203 i2cdev = i3c_master_alloc_i2c_dev(master, client->addr, in i3c_master_i2c_attach()
2219 i3c_bus_set_addr_slot_status(&master->bus, client->addr, in i3c_master_i2c_attach()
2230 dev = i3c_master_find_i2c_dev_by_addr(master, client->addr); in i3c_master_i2c_detach()
2232 return -ENODEV; in i3c_master_i2c_detach()
2235 i3c_bus_set_addr_slot_status(&master->bus, dev->addr, in i3c_master_i2c_detach()
2256 if (dev->type != &i2c_client_type) in i3c_i2c_notifier_call()
2260 adap = client->adapter; in i3c_i2c_notifier_call()
2262 if (adap->algo != &i3c_master_i2c_algo) in i3c_i2c_notifier_call()
2267 i3c_bus_maintenance_lock(&master->bus); in i3c_i2c_notifier_call()
2276 i3c_bus_maintenance_unlock(&master->bus); in i3c_i2c_notifier_call()
2292 adap->dev.parent = master->dev.parent; in i3c_master_i2c_adapter_init()
2293 adap->owner = master->dev.parent->driver->owner; in i3c_master_i2c_adapter_init()
2294 adap->algo = &i3c_master_i2c_algo; in i3c_master_i2c_adapter_init()
2295 strncpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name)); in i3c_master_i2c_adapter_init()
2297 /* FIXME: Should we allow i3c masters to override these values? */ in i3c_master_i2c_adapter_init()
2298 adap->timeout = 1000; in i3c_master_i2c_adapter_init()
2299 adap->retries = 3; in i3c_master_i2c_adapter_init()
2309 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) { in i3c_master_i2c_adapter_init()
2311 i2cboardinfo->base.addr); in i3c_master_i2c_adapter_init()
2314 i2cdev->dev = i2c_new_client_device(adap, &i2cboardinfo->base); in i3c_master_i2c_adapter_init()
2324 i2c_del_adapter(&master->i2c); in i3c_master_i2c_adapter_cleanup()
2326 i3c_bus_for_each_i2cdev(&master->bus, i2cdev) in i3c_master_i2c_adapter_cleanup()
2327 i2cdev->dev = NULL; in i3c_master_i2c_adapter_cleanup()
2334 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) { in i3c_master_unregister_i3c_devs()
2335 if (!i3cdev->dev) in i3c_master_unregister_i3c_devs()
2338 i3cdev->dev->desc = NULL; in i3c_master_unregister_i3c_devs()
2339 if (device_is_registered(&i3cdev->dev->dev)) in i3c_master_unregister_i3c_devs()
2340 device_unregister(&i3cdev->dev->dev); in i3c_master_unregister_i3c_devs()
2342 put_device(&i3cdev->dev->dev); in i3c_master_unregister_i3c_devs()
2343 i3cdev->dev = NULL; in i3c_master_unregister_i3c_devs()
2348 * i3c_master_queue_ibi() - Queue an IBI
2357 atomic_inc(&dev->ibi->pending_ibis); in i3c_master_queue_ibi()
2358 queue_work(dev->common.master->wq, &slot->work); in i3c_master_queue_ibi()
2366 struct i3c_dev_desc *dev = slot->dev; in i3c_master_handle_ibi()
2370 payload.data = slot->data; in i3c_master_handle_ibi()
2371 payload.len = slot->len; in i3c_master_handle_ibi()
2373 if (dev->dev) in i3c_master_handle_ibi()
2374 dev->ibi->handler(dev->dev, &payload); in i3c_master_handle_ibi()
2376 master->ops->recycle_ibi_slot(dev, slot); in i3c_master_handle_ibi()
2377 if (atomic_dec_and_test(&dev->ibi->pending_ibis)) in i3c_master_handle_ibi()
2378 complete(&dev->ibi->all_ibis_handled); in i3c_master_handle_ibi()
2384 slot->dev = dev; in i3c_master_init_ibi_slot()
2385 INIT_WORK(&slot->work, i3c_master_handle_ibi); in i3c_master_init_ibi_slot()
2403 * i3c_generic_ibi_free_pool() - Free a generic IBI pool
2413 while (!list_empty(&pool->free_slots)) { in i3c_generic_ibi_free_pool()
2414 slot = list_first_entry(&pool->free_slots, in i3c_generic_ibi_free_pool()
2416 list_del(&slot->node); in i3c_generic_ibi_free_pool()
2424 WARN_ON(nslots != pool->num_slots); in i3c_generic_ibi_free_pool()
2426 kfree(pool->payload_buf); in i3c_generic_ibi_free_pool()
2427 kfree(pool->slots); in i3c_generic_ibi_free_pool()
2433 * i3c_generic_ibi_alloc_pool() - Create a generic IBI pool
2452 return ERR_PTR(-ENOMEM); in i3c_generic_ibi_alloc_pool()
2454 spin_lock_init(&pool->lock); in i3c_generic_ibi_alloc_pool()
2455 INIT_LIST_HEAD(&pool->free_slots); in i3c_generic_ibi_alloc_pool()
2456 INIT_LIST_HEAD(&pool->pending); in i3c_generic_ibi_alloc_pool()
2458 pool->slots = kcalloc(req->num_slots, sizeof(*slot), GFP_KERNEL); in i3c_generic_ibi_alloc_pool()
2459 if (!pool->slots) { in i3c_generic_ibi_alloc_pool()
2460 ret = -ENOMEM; in i3c_generic_ibi_alloc_pool()
2464 if (req->max_payload_len) { in i3c_generic_ibi_alloc_pool()
2465 pool->payload_buf = kcalloc(req->num_slots, in i3c_generic_ibi_alloc_pool()
2466 req->max_payload_len, GFP_KERNEL); in i3c_generic_ibi_alloc_pool()
2467 if (!pool->payload_buf) { in i3c_generic_ibi_alloc_pool()
2468 ret = -ENOMEM; in i3c_generic_ibi_alloc_pool()
2473 for (i = 0; i < req->num_slots; i++) { in i3c_generic_ibi_alloc_pool()
2474 slot = &pool->slots[i]; in i3c_generic_ibi_alloc_pool()
2475 i3c_master_init_ibi_slot(dev, &slot->base); in i3c_generic_ibi_alloc_pool()
2477 if (req->max_payload_len) in i3c_generic_ibi_alloc_pool()
2478 slot->base.data = pool->payload_buf + in i3c_generic_ibi_alloc_pool()
2479 (i * req->max_payload_len); in i3c_generic_ibi_alloc_pool()
2481 list_add_tail(&slot->node, &pool->free_slots); in i3c_generic_ibi_alloc_pool()
2482 pool->num_slots++; in i3c_generic_ibi_alloc_pool()
2494 * i3c_generic_ibi_get_free_slot() - Get a free slot from a generic IBI pool
2509 spin_lock_irqsave(&pool->lock, flags); in i3c_generic_ibi_get_free_slot()
2510 slot = list_first_entry_or_null(&pool->free_slots, in i3c_generic_ibi_get_free_slot()
2513 list_del(&slot->node); in i3c_generic_ibi_get_free_slot()
2514 spin_unlock_irqrestore(&pool->lock, flags); in i3c_generic_ibi_get_free_slot()
2516 return slot ? &slot->base : NULL; in i3c_generic_ibi_get_free_slot()
2521 * i3c_generic_ibi_recycle_slot() - Return a slot to a generic IBI pool
2526 * master driver struct_master_controller_ops->recycle_ibi() method.
2538 spin_lock_irqsave(&pool->lock, flags); in i3c_generic_ibi_recycle_slot()
2539 list_add_tail(&slot->node, &pool->free_slots); in i3c_generic_ibi_recycle_slot()
2540 spin_unlock_irqrestore(&pool->lock, flags); in i3c_generic_ibi_recycle_slot()
2546 if (!ops || !ops->bus_init || !ops->priv_xfers || in i3c_master_check_ops()
2547 !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers) in i3c_master_check_ops()
2548 return -EINVAL; in i3c_master_check_ops()
2550 if (ops->request_ibi && in i3c_master_check_ops()
2551 (!ops->enable_ibi || !ops->disable_ibi || !ops->free_ibi || in i3c_master_check_ops()
2552 !ops->recycle_ibi_slot)) in i3c_master_check_ops()
2553 return -EINVAL; in i3c_master_check_ops()
2559 * i3c_master_register() - register an I3C master
2561 * @parent: the parent device (the one that provides this I3C master
2565 * -ENOTSUPP if set to true since secondary masters are not yet
2570 * - creates and initializes the I3C bus
2571 * - populates the bus with static I2C devs if @parent->of_node is not
2573 * - registers all I3C devices added by the controller during bus
2575 * - registers the I2C adapter and all I2C devices
2592 return -ENOTSUPP; in i3c_master_register()
2598 master->dev.parent = parent; in i3c_master_register()
2599 master->dev.of_node = of_node_get(parent->of_node); in i3c_master_register()
2600 master->dev.bus = &i3c_bus_type; in i3c_master_register()
2601 master->dev.type = &i3c_masterdev_type; in i3c_master_register()
2602 master->dev.release = i3c_masterdev_release; in i3c_master_register()
2603 master->ops = ops; in i3c_master_register()
2604 master->secondary = secondary; in i3c_master_register()
2605 INIT_LIST_HEAD(&master->boardinfo.i2c); in i3c_master_register()
2606 INIT_LIST_HEAD(&master->boardinfo.i3c); in i3c_master_register()
2612 device_initialize(&master->dev); in i3c_master_register()
2613 dev_set_name(&master->dev, "i3c-%d", i3cbus->id); in i3c_master_register()
2619 list_for_each_entry(i2cbi, &master->boardinfo.i2c, node) { in i3c_master_register()
2620 switch (i2cbi->lvr & I3C_LVR_I2C_INDEX_MASK) { in i3c_master_register()
2634 ret = -EINVAL; in i3c_master_register()
2638 if (i2cbi->lvr & I3C_LVR_I2C_FM_MODE) in i3c_master_register()
2646 master->wq = alloc_workqueue("%s", 0, 0, dev_name(parent)); in i3c_master_register()
2647 if (!master->wq) { in i3c_master_register()
2648 ret = -ENOMEM; in i3c_master_register()
2656 ret = device_add(&master->dev); in i3c_master_register()
2661 * Expose our I3C bus as an I2C adapter so that I2C devices are exposed in i3c_master_register()
2670 * register I3C devices discovered during the initial DAA. in i3c_master_register()
2672 master->init_done = true; in i3c_master_register()
2673 i3c_bus_normaluse_lock(&master->bus); in i3c_master_register()
2675 i3c_bus_normaluse_unlock(&master->bus); in i3c_master_register()
2680 device_del(&master->dev); in i3c_master_register()
2686 put_device(&master->dev); in i3c_master_register()
2693 * i3c_master_unregister() - unregister an I3C master
2705 device_unregister(&master->dev); in i3c_master_unregister()
2718 return -ENOENT; in i3c_dev_do_priv_xfers_locked()
2722 return -EINVAL; in i3c_dev_do_priv_xfers_locked()
2724 if (!master->ops->priv_xfers) in i3c_dev_do_priv_xfers_locked()
2725 return -ENOTSUPP; in i3c_dev_do_priv_xfers_locked()
2727 return master->ops->priv_xfers(dev, xfers, nxfers); in i3c_dev_do_priv_xfers_locked()
2735 if (!dev->ibi) in i3c_dev_disable_ibi_locked()
2736 return -EINVAL; in i3c_dev_disable_ibi_locked()
2739 ret = master->ops->disable_ibi(dev); in i3c_dev_disable_ibi_locked()
2743 reinit_completion(&dev->ibi->all_ibis_handled); in i3c_dev_disable_ibi_locked()
2744 if (atomic_read(&dev->ibi->pending_ibis)) in i3c_dev_disable_ibi_locked()
2745 wait_for_completion(&dev->ibi->all_ibis_handled); in i3c_dev_disable_ibi_locked()
2747 dev->ibi->enabled = false; in i3c_dev_disable_ibi_locked()
2757 if (!dev->ibi) in i3c_dev_enable_ibi_locked()
2758 return -EINVAL; in i3c_dev_enable_ibi_locked()
2760 ret = master->ops->enable_ibi(dev); in i3c_dev_enable_ibi_locked()
2762 dev->ibi->enabled = true; in i3c_dev_enable_ibi_locked()
2774 if (!master->ops->request_ibi) in i3c_dev_request_ibi_locked()
2775 return -ENOTSUPP; in i3c_dev_request_ibi_locked()
2777 if (dev->ibi) in i3c_dev_request_ibi_locked()
2778 return -EBUSY; in i3c_dev_request_ibi_locked()
2782 return -ENOMEM; in i3c_dev_request_ibi_locked()
2784 atomic_set(&ibi->pending_ibis, 0); in i3c_dev_request_ibi_locked()
2785 init_completion(&ibi->all_ibis_handled); in i3c_dev_request_ibi_locked()
2786 ibi->handler = req->handler; in i3c_dev_request_ibi_locked()
2787 ibi->max_payload_len = req->max_payload_len; in i3c_dev_request_ibi_locked()
2788 ibi->num_slots = req->num_slots; in i3c_dev_request_ibi_locked()
2790 dev->ibi = ibi; in i3c_dev_request_ibi_locked()
2791 ret = master->ops->request_ibi(dev, req); in i3c_dev_request_ibi_locked()
2794 dev->ibi = NULL; in i3c_dev_request_ibi_locked()
2804 if (!dev->ibi) in i3c_dev_free_ibi_locked()
2807 if (WARN_ON(dev->ibi->enabled)) in i3c_dev_free_ibi_locked()
2810 master->ops->free_ibi(dev); in i3c_dev_free_ibi_locked()
2811 kfree(dev->ibi); in i3c_dev_free_ibi_locked()
2812 dev->ibi = NULL; in i3c_dev_free_ibi_locked()
2844 MODULE_DESCRIPTION("I3C core");