Lines Matching +full:i3c +full:- +full:hci
1 // SPDX-License-Identifier: GPL-2.0
27 * i3c_bus_maintenance_lock - Lock the bus for a maintenance operation
28 * @bus: I3C bus to take the lock on
32 * - enabling/disabling slave events
33 * - re-triggering DAA
34 * - changing the dynamic address of a device
35 * - relinquishing mastership
36 * - ...
39 * logic to rely on I3C device information that could be changed behind their
44 down_write(&bus->lock);
48 * i3c_bus_maintenance_unlock - Release the bus lock after a maintenance
50 * @bus: I3C bus to release the lock on
58 up_write(&bus->lock);
62 * i3c_bus_normaluse_lock - Lock the bus for a normal operation
63 * @bus: I3C bus to take the lock on
66 * operation (see i3c_bus_maintenance_lock() for a non-exhaustive list of
67 * maintenance operations). Basically all communications with I3C devices are
69 * state or I3C dynamic address).
72 * In other words, transfer requests passed to the I3C master can be submitted
73 * in parallel and I3C master drivers have to use their own locking to make
74 * sure two different communications are not inter-mixed, or access to the
79 down_read(&bus->lock);
83 * i3c_bus_normaluse_unlock - Release the bus lock after a normal operation
84 * @bus: I3C bus to release the lock on
92 up_read(&bus->lock);
112 if (dev->type == &i3c_device_type)
113 return dev_to_i3cdev(dev)->bus;
117 return &master->bus;
124 if (dev->type == &i3c_device_type)
125 return dev_to_i3cdev(dev)->desc;
129 return master->this;
142 ret = sprintf(buf, "%x\n", desc->info.bcr);
159 ret = sprintf(buf, "%x\n", desc->info.dcr);
176 ret = sprintf(buf, "%llx\n", desc->info.pid);
193 ret = sprintf(buf, "%02x\n", desc->info.dyn_addr);
201 "hdr-ddr", "hdr-tsp", "hdr-tsl",
216 caps = desc->info.hdr_cap;
248 struct i3c_device *i3c = dev_to_i3cdev(dev);
252 i3c_device_get_info(i3c, &devinfo);
258 return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr,
261 return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X",
283 if (i3cdev->desc)
284 devinfo = i3cdev->desc->info;
290 return add_uevent_var(env, "MODALIAS=i3c:dcr%02Xmanuf%04X",
294 "MODALIAS=i3c:dcr%02Xmanuf%04Xpart%04Xext%04X",
308 if (dev->type != &i3c_device_type)
313 if (i3c_device_match_id(i3cdev, i3cdrv->id_table))
322 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver);
324 return driver->probe(i3cdev);
330 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver);
332 if (driver->remove)
333 driver->remove(i3cdev);
339 .name = "i3c",
354 status = bus->addrslots[bitpos / BITS_PER_LONG];
375 ptr = bus->addrslots + (bitpos / BITS_PER_LONG);
403 * Some master controllers (such as HCI) need to prepare the entire above transaction before
404 * sending it out to the I3C bus. This means that a 7-bit dynamic address needs to be allocated
407 * However, some I3C targets may request specific addresses (called as "init_dyn_addr"), which is
408 * typically specified by the DT-'s assigned-address property. Lower addresses having higher IBI
411 * the "init_dyn_addr" to switch to its "init_dyn_addr" when it hot-joins the I3C bus. Otherwise,
412 * if the "init_dyn_addr" is already in use by another I3C device, the target device will not be
437 return -ENOMEM;
462 idr_remove(&i3c_bus_idr, i3cbus->id);
468 int ret, start, end, id = -1;
470 init_rwsem(&i3cbus->lock);
471 INIT_LIST_HEAD(&i3cbus->devs.i2c);
472 INIT_LIST_HEAD(&i3cbus->devs.i3c);
474 i3cbus->mode = I3C_BUS_MODE_PURE;
477 id = of_alias_get_id(np, "i3c");
494 i3cbus->id = ret;
501 [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
502 [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited",
503 [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow",
514 if (i3cbus->mode < 0 ||
515 i3cbus->mode >= ARRAY_SIZE(i3c_bus_mode_strings) ||
516 !i3c_bus_mode_strings[i3cbus->mode])
519 ret = sprintf(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]);
534 ret = sprintf(buf, "%d-%llx\n", i3cbus->id,
535 i3cbus->cur_master->info.pid);
550 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i3c);
565 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i2c);
576 if (!master || !master->ops)
577 return -EINVAL;
579 if (!master->ops->enable_hotjoin || !master->ops->disable_hotjoin)
580 return -EINVAL;
582 i3c_bus_normaluse_lock(&master->bus);
585 ret = master->ops->enable_hotjoin(master);
587 ret = master->ops->disable_hotjoin(master);
589 master->hotjoin = enable;
591 i3c_bus_normaluse_unlock(&master->bus);
603 if (!i3cbus->cur_master)
604 return -EINVAL;
607 return -EINVAL;
609 ret = i3c_set_hotjoin(i3cbus->cur_master->common.master, res);
617 * i3c_master_enable_hotjoin - Enable hotjoin
618 * @master: I3C master object
629 * i3c_master_disable_hotjoin - Disable hotjoin
630 * @master: I3C master object
646 ret = sysfs_emit(buf, "%d\n", i3cbus->cur_master->common.master->hotjoin);
674 if (master->wq)
675 destroy_workqueue(master->wq);
677 WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c));
680 of_node_put(dev->of_node);
692 i3cbus->mode = mode;
694 switch (i3cbus->mode) {
696 if (!i3cbus->scl_rate.i3c)
697 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE;
701 if (!i3cbus->scl_rate.i3c)
702 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE;
703 if (!i3cbus->scl_rate.i2c)
704 i3cbus->scl_rate.i2c = max_i2c_scl_rate;
707 if (!i3cbus->scl_rate.i2c)
708 i3cbus->scl_rate.i2c = max_i2c_scl_rate;
709 if (!i3cbus->scl_rate.i3c ||
710 i3cbus->scl_rate.i3c > i3cbus->scl_rate.i2c)
711 i3cbus->scl_rate.i3c = i3cbus->scl_rate.i2c;
714 return -EINVAL;
717 dev_dbg(&master->dev, "i2c-scl = %ld Hz i3c-scl = %ld Hz\n",
718 i3cbus->scl_rate.i2c, i3cbus->scl_rate.i3c);
721 * I3C/I2C frequency may have been overridden, check that user-provided
724 if (i3cbus->scl_rate.i3c > I3C_BUS_MAX_I3C_SCL_RATE ||
725 i3cbus->scl_rate.i2c > I3C_BUS_I2C_FM_PLUS_SCL_RATE)
726 return -EINVAL;
740 return &master->i2c;
756 return ERR_PTR(-ENOMEM);
758 dev->common.master = master;
759 dev->addr = addr;
760 dev->lvr = lvr;
768 dest->addr = addr;
769 dest->payload.len = payloadlen;
771 dest->payload.data = kzalloc(payloadlen, GFP_KERNEL);
773 dest->payload.data = NULL;
775 return dest->payload.data;
780 kfree(dest->payload.data);
787 cmd->rnw = rnw ? 1 : 0;
788 cmd->id = id;
789 cmd->dests = dests;
790 cmd->ndests = ndests;
791 cmd->err = I3C_ERROR_UNKNOWN;
800 return -EINVAL;
802 if (WARN_ON(master->init_done &&
803 !rwsem_is_locked(&master->bus.lock)))
804 return -EINVAL;
806 if (!master->ops->send_ccc_cmd)
807 return -ENOTSUPP;
809 if ((cmd->id & I3C_CCC_DIRECT) && (!cmd->dests || !cmd->ndests))
810 return -EINVAL;
812 if (master->ops->supports_ccc_cmd &&
813 !master->ops->supports_ccc_cmd(master, cmd))
814 return -ENOTSUPP;
816 ret = master->ops->send_ccc_cmd(master, cmd);
818 if (cmd->err != I3C_ERROR_UNKNOWN)
819 return cmd->err;
833 i3c_bus_for_each_i2cdev(&master->bus, dev) {
834 if (dev->addr == addr)
842 * i3c_master_get_free_addr() - get a free address on the bus
843 * @master: I3C master object
848 * Return: the first free address starting at @start_addr (included) or -ENOMEM
854 return i3c_bus_get_free_addr(&master->bus, start_addr);
862 WARN_ON(i3cdev->desc);
864 of_node_put(i3cdev->dev.of_node);
881 return ERR_PTR(-ENOMEM);
883 dev->common.master = master;
884 dev->info = *info;
885 mutex_init(&dev->ibi_lock);
899 return -EINVAL;
901 addrstat = i3c_bus_get_addr_slot_status(&master->bus, addr);
903 return -EINVAL;
916 * i3c_master_entdaa_locked() - start a DAA (Dynamic Address Assignment)
923 * behind dynamic address assignment has to be handled in the I3C master
928 * Return: 0 in case of success, a positive I3C error code if the error is
956 return -ENOMEM;
958 events->events = evts;
971 * i3c_master_disec_locked() - send a DISEC CCC command
973 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
981 * Return: 0 in case of success, a positive I3C error code if the error is
992 * i3c_master_enec_locked() - send an ENEC CCC command
994 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
1002 * Return: 0 in case of success, a positive I3C error code if the error is
1013 * i3c_master_defslvs_locked() - send a DEFSLVS CCC command
1020 * This should be called after all I3C devices have been discovered (in other
1022 * &i3c_master_controller_ops->bus_init().
1023 * It should also be called if a master ACKed an Hot-Join request and assigned
1028 * Return: 0 in case of success, a positive I3C error code if the error is
1044 return -EINVAL;
1050 if (i3cdev == master->this)
1053 if (I3C_BCR_DEVICE_ROLE(i3cdev->info.bcr) ==
1067 ndevs - 1));
1069 return -ENOMEM;
1071 defslvs->count = ndevs;
1072 defslvs->master.bcr = master->this->info.bcr;
1073 defslvs->master.dcr = master->this->info.dcr;
1074 defslvs->master.dyn_addr = master->this->info.dyn_addr << 1;
1075 defslvs->master.static_addr = I3C_BROADCAST_ADDR << 1;
1077 desc = defslvs->slaves;
1079 desc->lvr = i2cdev->lvr;
1080 desc->static_addr = i2cdev->addr << 1;
1085 /* Skip the I3C dev representing this master. */
1086 if (i3cdev == master->this)
1089 desc->bcr = i3cdev->info.bcr;
1090 desc->dcr = i3cdev->info.dcr;
1091 desc->dyn_addr = i3cdev->info.dyn_addr << 1;
1092 desc->static_addr = i3cdev->info.static_addr << 1;
1113 return -EINVAL;
1117 return -ENOMEM;
1119 setda->addr = newaddr << 1;
1149 mrl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mrl));
1151 return -ENOMEM;
1157 if (!(info->bcr & I3C_BCR_IBI_PAYLOAD))
1158 dest.payload.len -= 1;
1167 info->max_ibi_len = mrl->ibi_len;
1170 info->max_read_len = be16_to_cpu(mrl->read_len);
1173 ret = -EIO;
1191 mwl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mwl));
1193 return -ENOMEM;
1201 ret = -EIO;
1205 info->max_write_len = be16_to_cpu(mwl->len);
1221 getmaxds = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr,
1224 return -ENOMEM;
1232 ret = -EIO;
1236 info->max_read_ds = getmaxds->maxrd;
1237 info->max_write_ds = getmaxds->maxwr;
1239 info->max_read_turnaround = getmaxds->maxrdturn[0] |
1240 ((u32)getmaxds->maxrdturn[1] << 8) |
1241 ((u32)getmaxds->maxrdturn[2] << 16);
1257 gethdrcap = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr,
1260 return -ENOMEM;
1268 ret = -EIO;
1272 info->hdr_cap = gethdrcap->modes;
1288 getpid = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getpid));
1290 return -ENOMEM;
1297 info->pid = 0;
1298 for (i = 0; i < sizeof(getpid->pid); i++) {
1299 int sft = (sizeof(getpid->pid) - i - 1) * 8;
1301 info->pid |= (u64)getpid->pid[i] << sft;
1318 getbcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getbcr));
1320 return -ENOMEM;
1327 info->bcr = getbcr->bcr;
1343 getdcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getdcr));
1345 return -ENOMEM;
1352 info->dcr = getdcr->dcr;
1366 if (!dev->info.dyn_addr)
1367 return -EINVAL;
1369 slot_status = i3c_bus_get_addr_slot_status(&master->bus,
1370 dev->info.dyn_addr);
1373 return -EINVAL;
1375 ret = i3c_master_getpid_locked(master, &dev->info);
1379 ret = i3c_master_getbcr_locked(master, &dev->info);
1383 ret = i3c_master_getdcr_locked(master, &dev->info);
1387 if (dev->info.bcr & I3C_BCR_MAX_DATA_SPEED_LIM) {
1388 ret = i3c_master_getmxds_locked(master, &dev->info);
1393 if (dev->info.bcr & I3C_BCR_IBI_PAYLOAD)
1394 dev->info.max_ibi_len = 1;
1396 i3c_master_getmrl_locked(master, &dev->info);
1397 i3c_master_getmwl_locked(master, &dev->info);
1399 if (dev->info.bcr & I3C_BCR_HDR_CAP) {
1400 ret = i3c_master_gethdrcap_locked(master, &dev->info);
1412 if (dev->info.static_addr)
1413 i3c_bus_set_addr_slot_status(&master->bus,
1414 dev->info.static_addr,
1417 if (dev->info.dyn_addr)
1418 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr,
1421 if (dev->boardinfo && dev->boardinfo->init_dyn_addr)
1422 i3c_bus_set_addr_slot_status(&master->bus, dev->boardinfo->init_dyn_addr,
1431 if (!dev->info.static_addr && !dev->info.dyn_addr)
1434 if (dev->info.static_addr) {
1435 status = i3c_bus_get_addr_slot_status(&master->bus,
1436 dev->info.static_addr);
1441 dev->info.static_addr != dev->boardinfo->init_dyn_addr)
1442 return -EBUSY;
1444 i3c_bus_set_addr_slot_status(&master->bus,
1445 dev->info.static_addr,
1450 * ->init_dyn_addr should have been reserved before that, so, if we're
1451 * trying to apply a pre-reserved dynamic address, we should not try
1454 if (dev->info.dyn_addr &&
1455 (!dev->boardinfo ||
1456 dev->boardinfo->init_dyn_addr != dev->info.dyn_addr)) {
1457 status = i3c_bus_get_addr_slot_status(&master->bus,
1458 dev->info.dyn_addr);
1462 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr,
1469 if (dev->info.static_addr)
1470 i3c_bus_set_addr_slot_status(&master->bus,
1471 dev->info.static_addr,
1474 return -EBUSY;
1486 if (!dev->info.static_addr && !dev->info.dyn_addr)
1494 if (master->this != dev && master->ops->attach_i3c_dev) {
1495 ret = master->ops->attach_i3c_dev(dev);
1502 list_add_tail(&dev->common.node, &master->bus.devs.i3c);
1513 if (dev->info.dyn_addr != old_dyn_addr) {
1514 i3c_bus_set_addr_slot_status(&master->bus,
1515 dev->info.dyn_addr,
1518 i3c_bus_set_addr_slot_status(&master->bus, old_dyn_addr,
1522 if (master->ops->reattach_i3c_dev) {
1523 ret = master->ops->reattach_i3c_dev(dev, old_dyn_addr);
1538 if (master->this != dev && master->ops->detach_i3c_dev)
1539 master->ops->detach_i3c_dev(dev);
1542 list_del(&dev->common.node);
1550 if (master->ops->attach_i2c_dev) {
1551 ret = master->ops->attach_i2c_dev(dev);
1556 list_add_tail(&dev->common.node, &master->bus.devs.i2c);
1565 list_del(&dev->common.node);
1567 if (master->ops->detach_i2c_dev)
1568 master->ops->detach_i2c_dev(dev);
1575 .static_addr = boardinfo->static_addr,
1576 .pid = boardinfo->pid,
1583 return -ENOMEM;
1585 i3cdev->boardinfo = boardinfo;
1591 ret = i3c_master_setdasa_locked(master, i3cdev->info.static_addr,
1592 i3cdev->boardinfo->init_dyn_addr);
1596 i3cdev->info.dyn_addr = i3cdev->boardinfo->init_dyn_addr;
1608 i3c_master_rstdaa_locked(master, i3cdev->boardinfo->init_dyn_addr);
1623 if (!master->init_done)
1626 i3c_bus_for_each_i3cdev(&master->bus, desc) {
1627 if (desc->dev || !desc->info.dyn_addr || desc == master->this)
1630 desc->dev = kzalloc(sizeof(*desc->dev), GFP_KERNEL);
1631 if (!desc->dev)
1634 desc->dev->bus = &master->bus;
1635 desc->dev->desc = desc;
1636 desc->dev->dev.parent = &master->dev;
1637 desc->dev->dev.type = &i3c_device_type;
1638 desc->dev->dev.bus = &i3c_bus_type;
1639 desc->dev->dev.release = i3c_device_release;
1640 dev_set_name(&desc->dev->dev, "%d-%llx", master->bus.id,
1641 desc->info.pid);
1643 if (desc->boardinfo)
1644 desc->dev->dev.of_node = desc->boardinfo->of_node;
1646 ret = device_register(&desc->dev->dev);
1648 dev_err(&master->dev,
1649 "Failed to add I3C device (err = %d)\n", ret);
1650 put_device(&desc->dev->dev);
1656 * i3c_master_do_daa() - do a DAA (Dynamic Address Assignment)
1659 * This function is instantiating an I3C device object and adding it to the
1660 * I3C device list. All device information are automatically retrieved using
1663 * The I3C device object is returned in case the master wants to attach
1674 i3c_bus_maintenance_lock(&master->bus);
1675 ret = master->ops->do_daa(master);
1676 i3c_bus_maintenance_unlock(&master->bus);
1681 i3c_bus_normaluse_lock(&master->bus);
1683 i3c_bus_normaluse_unlock(&master->bus);
1690 * i3c_master_set_info() - set master device information
1692 * @info: I3C device information
1695 * &i3c_master_controller_ops->bus_init().
1700 * - &i3c_device_info->dyn_addr
1701 * - &i3c_device_info->bcr
1702 * - &i3c_device_info->dcr
1703 * - &i3c_device_info->pid
1704 * - &i3c_device_info->hdr_cap if %I3C_BCR_HDR_CAP bit is set in
1705 * &i3c_device_info->bcr
1710 * information can be checked, but we can at least make sure @info->dyn_addr
1711 * and @info->bcr are correct), -EINVAL otherwise.
1719 if (!i3c_bus_dev_addr_is_avail(&master->bus, info->dyn_addr))
1720 return -EINVAL;
1722 if (I3C_BCR_DEVICE_ROLE(info->bcr) == I3C_BCR_I3C_MASTER &&
1723 master->secondary)
1724 return -EINVAL;
1726 if (master->this)
1727 return -EINVAL;
1733 master->this = i3cdev;
1734 master->bus.cur_master = master->this;
1754 list_for_each_entry_safe(i3cdev, i3ctmp, &master->bus.devs.i3c,
1758 if (i3cdev->boardinfo && i3cdev->boardinfo->init_dyn_addr)
1759 i3c_bus_set_addr_slot_status(&master->bus,
1760 i3cdev->boardinfo->init_dyn_addr,
1766 list_for_each_entry_safe(i2cdev, i2ctmp, &master->bus.devs.i2c,
1769 i3c_bus_set_addr_slot_status(&master->bus,
1770 i2cdev->addr,
1777 * i3c_master_bus_init() - initialize an I3C bus
1780 * This function is following all initialisation steps described in the I3C
1786 * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
1796 * 5. Reserve address slots for I3C devices with init_dyn_addr. And if devices
1797 * also have static_addr, try to pre-assign dynamic addresses requested by
1798 * the FW with SETDASA and attach corresponding statically defined I3C
1802 * remaining I3C devices
1804 * Once this is done, all I3C and I2C devices should be usable.
1820 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
1821 status = i3c_bus_get_addr_slot_status(&master->bus,
1822 i2cboardinfo->base.addr);
1824 ret = -EBUSY;
1828 i3c_bus_set_addr_slot_status(&master->bus,
1829 i2cboardinfo->base.addr,
1833 i2cboardinfo->base.addr,
1834 i2cboardinfo->lvr);
1848 * Now execute the controller specific ->bus_init() routine, which
1851 ret = master->ops->bus_init(master);
1856 * The master device should have been instantiated in ->bus_init(),
1859 if (!master->this) {
1860 dev_err(&master->dev,
1861 "master_set_info() was not called in ->bus_init()\n");
1862 ret = -EINVAL;
1866 if (master->ops->set_speed) {
1867 ret = master->ops->set_speed(master, I3C_OPEN_DRAIN_SLOW_SPEED);
1880 if (master->ops->set_speed) {
1881 ret = master->ops->set_speed(master, I3C_OPEN_DRAIN_NORMAL_SPEED);
1894 * Reserve init_dyn_addr first, and then try to pre-assign dynamic
1896 * In case pre-assign dynamic address fails, setting dynamic address to
1900 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) {
1906 if (!i3cboardinfo->init_dyn_addr)
1909 ret = i3c_bus_get_addr_slot_status(&master->bus,
1910 i3cboardinfo->init_dyn_addr);
1912 ret = -EBUSY;
1917 i3c_bus_set_addr_slot_status_mask(&master->bus,
1918 i3cboardinfo->init_dyn_addr,
1930 if (i3cboardinfo->static_addr)
1944 if (master->ops->bus_cleanup)
1945 master->ops->bus_cleanup(master);
1955 if (master->ops->bus_cleanup)
1956 master->ops->bus_cleanup(master);
1963 struct i3c_master_controller *master = i3cdev->common.master;
1966 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) {
1967 if (i3cdev->info.pid != i3cboardinfo->pid)
1970 i3cdev->boardinfo = i3cboardinfo;
1971 i3cdev->info.static_addr = i3cboardinfo->static_addr;
1982 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) {
1983 if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid)
1991 * i3c_master_add_i3c_dev_locked() - add an I3C slave to the bus
1993 * @addr: I3C slave dynamic address assigned to the device
1995 * This function is instantiating an I3C device object and adding it to the
1996 * I3C device list. All device information are automatically retrieved using
1999 * The I3C device object is returned in case the master wants to attach
2017 return -EINVAL;
2035 newdev->dev = olddev->dev;
2036 if (newdev->dev)
2037 newdev->dev->desc = newdev;
2045 mutex_lock(&olddev->ibi_lock);
2046 if (olddev->ibi) {
2047 ibireq.handler = olddev->ibi->handler;
2048 ibireq.max_payload_len = olddev->ibi->max_payload_len;
2049 ibireq.num_slots = olddev->ibi->num_slots;
2051 if (olddev->ibi->enabled)
2055 * i3c bus as it does not exist and has been assigned
2057 * So, update the olddev->ibi->enabled flag to false
2060 olddev->ibi->enabled = false;
2063 mutex_unlock(&olddev->ibi_lock);
2065 old_dyn_addr = olddev->info.dyn_addr;
2074 * - if the device already had a dynamic address assigned, let's try to
2075 * re-apply this one
2076 * - if the device did not have a dynamic address and the firmware
2078 * - in any other case, keep the address automatically assigned by the
2081 if (old_dyn_addr && old_dyn_addr != newdev->info.dyn_addr)
2083 else if (newdev->boardinfo && newdev->boardinfo->init_dyn_addr)
2084 expected_dyn_addr = newdev->boardinfo->init_dyn_addr;
2086 expected_dyn_addr = newdev->info.dyn_addr;
2088 if (newdev->info.dyn_addr != expected_dyn_addr &&
2089 i3c_bus_get_addr_slot_status(&master->bus, expected_dyn_addr) == I3C_ADDR_SLOT_FREE) {
2095 newdev->info.dyn_addr,
2098 old_dyn_addr = newdev->info.dyn_addr;
2099 newdev->info.dyn_addr = expected_dyn_addr;
2102 dev_err(&master->dev,
2104 master->bus.id, newdev->info.pid);
2116 mutex_lock(&newdev->ibi_lock);
2119 dev_err(&master->dev,
2120 "Failed to request IBI on device %d-%llx",
2121 master->bus.id, newdev->info.pid);
2125 dev_err(&master->dev,
2126 "Failed to re-enable IBI on device %d-%llx",
2127 master->bus.id, newdev->info.pid);
2129 mutex_unlock(&newdev->ibi_lock);
2135 if (newdev->dev && newdev->dev->desc)
2136 newdev->dev->desc = NULL;
2154 struct device *dev = &master->dev;
2159 return -ENOMEM;
2161 ret = of_i2c_get_board_info(dev, node, &boardinfo->base);
2166 * The I3C Specification does not clearly say I2C devices with 10-bit
2170 if (boardinfo->base.flags & I2C_CLIENT_TEN) {
2172 return -ENOTSUPP;
2176 boardinfo->lvr = reg[2];
2178 list_add_tail(&boardinfo->node, &master->boardinfo.i2c);
2189 struct device *dev = &master->dev;
2195 return -ENOMEM;
2199 return -EINVAL;
2201 addrstatus = i3c_bus_get_addr_slot_status(&master->bus,
2204 return -EINVAL;
2207 boardinfo->static_addr = reg[0];
2209 if (!of_property_read_u32(node, "assigned-address", &init_dyn_addr)) {
2211 return -EINVAL;
2213 addrstatus = i3c_bus_get_addr_slot_status(&master->bus,
2216 return -EINVAL;
2219 boardinfo->pid = ((u64)reg[1] << 32) | reg[2];
2221 if ((boardinfo->pid & GENMASK_ULL(63, 48)) ||
2222 I3C_PID_RND_LOWER_32BITS(boardinfo->pid))
2223 return -EINVAL;
2225 boardinfo->init_dyn_addr = init_dyn_addr;
2226 boardinfo->of_node = of_node_get(node);
2227 list_add_tail(&boardinfo->node, &master->boardinfo.i3c);
2239 return -EINVAL;
2259 struct device *dev = &master->dev;
2260 struct device_node *i3cbus_np = dev->of_node;
2277 * The user might want to limit I2C and I3C speed in case some devices
2281 if (!of_property_read_u32(i3cbus_np, "i2c-scl-hz", &val))
2282 master->bus.scl_rate.i2c = val;
2284 if (!of_property_read_u32(i3cbus_np, "i3c-scl-hz", &val))
2285 master->bus.scl_rate.i3c = val;
2299 return -EINVAL;
2301 if (!master->ops->i2c_xfers)
2302 return -ENOTSUPP;
2308 return -ENOTSUPP;
2311 i3c_bus_normaluse_lock(&master->bus);
2314 ret = -ENOENT;
2316 ret = master->ops->i2c_xfers(dev, xfers, nxfers);
2317 i3c_bus_normaluse_unlock(&master->bus);
2332 if (client->dev.of_node) {
2335 if (!of_property_read_u32_array(client->dev.of_node, "reg",
2351 if (i3c_master_find_i2c_dev_by_addr(master, client->addr))
2354 status = i3c_bus_get_addr_slot_status(&master->bus, client->addr);
2356 return -EBUSY;
2358 i3c_bus_set_addr_slot_status(&master->bus, client->addr,
2361 i2cdev = i3c_master_alloc_i2c_dev(master, client->addr,
2377 i3c_bus_set_addr_slot_status(&master->bus, client->addr,
2388 dev = i3c_master_find_i2c_dev_by_addr(master, client->addr);
2390 return -ENODEV;
2393 i3c_bus_set_addr_slot_status(&master->bus, dev->addr,
2414 if (dev->type != &i2c_client_type)
2418 adap = client->adapter;
2420 if (adap->algo != &i3c_master_i2c_algo)
2425 i3c_bus_maintenance_lock(&master->bus);
2434 i3c_bus_maintenance_unlock(&master->bus);
2450 adap->dev.parent = master->dev.parent;
2451 adap->owner = master->dev.parent->driver->owner;
2452 adap->algo = &i3c_master_i2c_algo;
2453 strncpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name));
2455 /* FIXME: Should we allow i3c masters to override these values? */
2456 adap->timeout = 1000;
2457 adap->retries = 3;
2467 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
2469 i2cboardinfo->base.addr);
2472 i2cdev->dev = i2c_new_client_device(adap, &i2cboardinfo->base);
2482 i2c_del_adapter(&master->i2c);
2484 i3c_bus_for_each_i2cdev(&master->bus, i2cdev)
2485 i2cdev->dev = NULL;
2492 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) {
2493 if (!i3cdev->dev)
2496 i3cdev->dev->desc = NULL;
2497 if (device_is_registered(&i3cdev->dev->dev))
2498 device_unregister(&i3cdev->dev->dev);
2500 put_device(&i3cdev->dev->dev);
2501 i3cdev->dev = NULL;
2506 * i3c_master_queue_ibi() - Queue an IBI
2515 if (!dev->ibi || !slot)
2518 atomic_inc(&dev->ibi->pending_ibis);
2519 queue_work(dev->common.master->wq, &slot->work);
2527 struct i3c_dev_desc *dev = slot->dev;
2531 payload.data = slot->data;
2532 payload.len = slot->len;
2534 if (dev->dev)
2535 dev->ibi->handler(dev->dev, &payload);
2537 master->ops->recycle_ibi_slot(dev, slot);
2538 if (atomic_dec_and_test(&dev->ibi->pending_ibis))
2539 complete(&dev->ibi->all_ibis_handled);
2545 slot->dev = dev;
2546 INIT_WORK(&slot->work, i3c_master_handle_ibi);
2564 * i3c_generic_ibi_free_pool() - Free a generic IBI pool
2574 while (!list_empty(&pool->free_slots)) {
2575 slot = list_first_entry(&pool->free_slots,
2577 list_del(&slot->node);
2585 WARN_ON(nslots != pool->num_slots);
2587 kfree(pool->payload_buf);
2588 kfree(pool->slots);
2594 * i3c_generic_ibi_alloc_pool() - Create a generic IBI pool
2613 return ERR_PTR(-ENOMEM);
2615 spin_lock_init(&pool->lock);
2616 INIT_LIST_HEAD(&pool->free_slots);
2617 INIT_LIST_HEAD(&pool->pending);
2619 pool->slots = kcalloc(req->num_slots, sizeof(*slot), GFP_KERNEL);
2620 if (!pool->slots) {
2621 ret = -ENOMEM;
2625 if (req->max_payload_len) {
2626 pool->payload_buf = kcalloc(req->num_slots,
2627 req->max_payload_len, GFP_KERNEL);
2628 if (!pool->payload_buf) {
2629 ret = -ENOMEM;
2634 for (i = 0; i < req->num_slots; i++) {
2635 slot = &pool->slots[i];
2636 i3c_master_init_ibi_slot(dev, &slot->base);
2638 if (req->max_payload_len)
2639 slot->base.data = pool->payload_buf +
2640 (i * req->max_payload_len);
2642 list_add_tail(&slot->node, &pool->free_slots);
2643 pool->num_slots++;
2655 * i3c_generic_ibi_get_free_slot() - Get a free slot from a generic IBI pool
2670 spin_lock_irqsave(&pool->lock, flags);
2671 slot = list_first_entry_or_null(&pool->free_slots,
2674 list_del(&slot->node);
2675 spin_unlock_irqrestore(&pool->lock, flags);
2677 return slot ? &slot->base : NULL;
2682 * i3c_generic_ibi_recycle_slot() - Return a slot to a generic IBI pool
2687 * master driver struct_master_controller_ops->recycle_ibi() method.
2699 spin_lock_irqsave(&pool->lock, flags);
2700 list_add_tail(&slot->node, &pool->free_slots);
2701 spin_unlock_irqrestore(&pool->lock, flags);
2707 if (!ops || !ops->bus_init || !ops->priv_xfers ||
2708 !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers)
2709 return -EINVAL;
2711 if (ops->request_ibi &&
2712 (!ops->enable_ibi || !ops->disable_ibi || !ops->free_ibi ||
2713 !ops->recycle_ibi_slot))
2714 return -EINVAL;
2720 * i3c_master_register() - register an I3C master
2722 * @parent: the parent device (the one that provides this I3C master
2726 * -ENOTSUPP if set to true since secondary masters are not yet
2731 * - creates and initializes the I3C bus
2732 * - populates the bus with static I2C devs if @parent->of_node is not
2734 * - registers all I3C devices added by the controller during bus
2736 * - registers the I2C adapter and all I2C devices
2753 return -ENOTSUPP;
2759 master->dev.parent = parent;
2760 master->dev.of_node = of_node_get(parent->of_node);
2761 master->dev.bus = &i3c_bus_type;
2762 master->dev.type = &i3c_masterdev_type;
2763 master->dev.release = i3c_masterdev_release;
2764 master->ops = ops;
2765 master->secondary = secondary;
2766 INIT_LIST_HEAD(&master->boardinfo.i2c);
2767 INIT_LIST_HEAD(&master->boardinfo.i3c);
2769 ret = i3c_bus_init(i3cbus, master->dev.of_node);
2773 device_initialize(&master->dev);
2774 dev_set_name(&master->dev, "i3c-%d", i3cbus->id);
2780 list_for_each_entry(i2cbi, &master->boardinfo.i2c, node) {
2781 switch (i2cbi->lvr & I3C_LVR_I2C_INDEX_MASK) {
2795 ret = -EINVAL;
2799 if (i2cbi->lvr & I3C_LVR_I2C_FM_MODE)
2807 master->wq = alloc_workqueue("%s", 0, 0, dev_name(parent));
2808 if (!master->wq) {
2809 ret = -ENOMEM;
2817 ret = device_add(&master->dev);
2822 * Expose our I3C bus as an I2C adapter so that I2C devices are exposed
2831 * register I3C devices discovered during the initial DAA.
2833 master->init_done = true;
2834 i3c_bus_normaluse_lock(&master->bus);
2836 i3c_bus_normaluse_unlock(&master->bus);
2841 device_del(&master->dev);
2847 put_device(&master->dev);
2854 * i3c_master_unregister() - unregister an I3C master
2864 device_unregister(&master->dev);
2873 return -ENOENT;
2877 return -EINVAL;
2879 if (!dev->boardinfo || !dev->boardinfo->init_dyn_addr ||
2880 !dev->boardinfo->static_addr)
2881 return -EINVAL;
2883 return i3c_master_setdasa_locked(master, dev->info.static_addr,
2884 dev->boardinfo->init_dyn_addr);
2894 return -ENOENT;
2898 return -EINVAL;
2900 if (!master->ops->priv_xfers)
2901 return -ENOTSUPP;
2903 return master->ops->priv_xfers(dev, xfers, nxfers);
2911 if (!dev->ibi)
2912 return -EINVAL;
2915 ret = master->ops->disable_ibi(dev);
2919 reinit_completion(&dev->ibi->all_ibis_handled);
2920 if (atomic_read(&dev->ibi->pending_ibis))
2921 wait_for_completion(&dev->ibi->all_ibis_handled);
2923 dev->ibi->enabled = false;
2933 if (!dev->ibi)
2934 return -EINVAL;
2936 ret = master->ops->enable_ibi(dev);
2938 dev->ibi->enabled = true;
2950 if (!master->ops->request_ibi)
2951 return -ENOTSUPP;
2953 if (dev->ibi)
2954 return -EBUSY;
2958 return -ENOMEM;
2960 atomic_set(&ibi->pending_ibis, 0);
2961 init_completion(&ibi->all_ibis_handled);
2962 ibi->handler = req->handler;
2963 ibi->max_payload_len = req->max_payload_len;
2964 ibi->num_slots = req->num_slots;
2966 dev->ibi = ibi;
2967 ret = master->ops->request_ibi(dev, req);
2970 dev->ibi = NULL;
2980 if (!dev->ibi)
2983 if (WARN_ON(dev->ibi->enabled))
2986 master->ops->free_ibi(dev);
2987 kfree(dev->ibi);
2988 dev->ibi = NULL;
2995 res = of_alias_get_highest_id("i3c");
3028 MODULE_DESCRIPTION("I3C core");