Lines Matching +full:i3c +full:- +full:hci
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);
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);
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);
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);
113 if (dev->type == &i3c_device_type)
114 return dev_to_i3cdev(dev)->bus;
118 return &master->bus;
125 if (dev->type == &i3c_device_type)
126 return dev_to_i3cdev(dev)->desc;
130 return master->this;
143 ret = sprintf(buf, "%x\n", desc->info.bcr);
160 ret = sprintf(buf, "%x\n", desc->info.dcr);
177 ret = sprintf(buf, "%llx\n", desc->info.pid);
194 ret = sprintf(buf, "%02x\n", desc->info.dyn_addr);
202 "hdr-ddr", "hdr-tsp", "hdr-tsl",
217 caps = desc->info.hdr_cap;
249 struct i3c_device *i3c = dev_to_i3cdev(dev);
253 i3c_device_get_info(i3c, &devinfo);
259 return sprintf(buf, "i3c:dcr%02Xmanuf%04X", devinfo.dcr,
262 return sprintf(buf, "i3c:dcr%02Xmanuf%04Xpart%04Xext%04X",
284 if (i3cdev->desc)
285 devinfo = i3cdev->desc->info;
291 return add_uevent_var(env, "MODALIAS=i3c:dcr%02Xmanuf%04X",
295 "MODALIAS=i3c:dcr%02Xmanuf%04Xpart%04Xext%04X",
309 if (dev->type != &i3c_device_type)
314 if (i3c_device_match_id(i3cdev, i3cdrv->id_table))
323 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver);
325 return driver->probe(i3cdev);
331 struct i3c_driver *driver = drv_to_i3cdrv(dev->driver);
333 if (driver->remove)
334 driver->remove(i3cdev);
340 .name = "i3c",
355 status = bus->addrslots[bitpos / BITS_PER_LONG];
376 ptr = bus->addrslots + (bitpos / BITS_PER_LONG);
404 * Some master controllers (such as HCI) need to prepare the entire above transaction before
405 * sending it out to the I3C bus. This means that a 7-bit dynamic address needs to be allocated
408 * However, some I3C targets may request specific addresses (called as "init_dyn_addr"), which is
409 * typically specified by the DT-'s assigned-address property. Lower addresses having higher IBI
412 * the "init_dyn_addr" to switch to its "init_dyn_addr" when it hot-joins the I3C bus. Otherwise,
413 * if the "init_dyn_addr" is already in use by another I3C device, the target device will not be
438 return -ENOMEM;
463 idr_remove(&i3c_bus_idr, i3cbus->id);
469 int ret, start, end, id = -1;
471 init_rwsem(&i3cbus->lock);
472 INIT_LIST_HEAD(&i3cbus->devs.i2c);
473 INIT_LIST_HEAD(&i3cbus->devs.i3c);
475 i3cbus->mode = I3C_BUS_MODE_PURE;
478 id = of_alias_get_id(np, "i3c");
495 i3cbus->id = ret;
532 [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
533 [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited",
534 [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow",
545 if (i3cbus->mode < 0 ||
546 i3cbus->mode >= ARRAY_SIZE(i3c_bus_mode_strings) ||
547 !i3c_bus_mode_strings[i3cbus->mode])
550 ret = sprintf(buf, "%s\n", i3c_bus_mode_strings[i3cbus->mode]);
565 ret = sprintf(buf, "%d-%llx\n", i3cbus->id,
566 i3cbus->cur_master->info.pid);
581 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i3c);
596 ret = sprintf(buf, "%ld\n", i3cbus->scl_rate.i2c);
607 if (!master || !master->ops)
608 return -EINVAL;
610 if (!master->ops->enable_hotjoin || !master->ops->disable_hotjoin)
611 return -EINVAL;
613 i3c_bus_normaluse_lock(&master->bus);
616 ret = master->ops->enable_hotjoin(master);
618 ret = master->ops->disable_hotjoin(master);
620 master->hotjoin = enable;
622 i3c_bus_normaluse_unlock(&master->bus);
634 if (!i3cbus->cur_master)
635 return -EINVAL;
638 return -EINVAL;
640 ret = i3c_set_hotjoin(i3cbus->cur_master->common.master, res);
648 * i3c_master_enable_hotjoin - Enable hotjoin
649 * @master: I3C master object
660 * i3c_master_disable_hotjoin - Disable hotjoin
661 * @master: I3C master object
677 ret = sysfs_emit(buf, "%d\n", i3cbus->cur_master->common.master->hotjoin);
705 if (master->wq)
706 destroy_workqueue(master->wq);
708 WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c));
711 of_node_put(dev->of_node);
723 i3cbus->mode = mode;
725 switch (i3cbus->mode) {
727 if (!i3cbus->scl_rate.i3c)
728 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE;
732 if (!i3cbus->scl_rate.i3c)
733 i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE;
734 if (!i3cbus->scl_rate.i2c)
735 i3cbus->scl_rate.i2c = max_i2c_scl_rate;
738 if (!i3cbus->scl_rate.i2c)
739 i3cbus->scl_rate.i2c = max_i2c_scl_rate;
740 if (!i3cbus->scl_rate.i3c ||
741 i3cbus->scl_rate.i3c > i3cbus->scl_rate.i2c)
742 i3cbus->scl_rate.i3c = i3cbus->scl_rate.i2c;
745 return -EINVAL;
748 dev_dbg(&master->dev, "i2c-scl = %ld Hz i3c-scl = %ld Hz\n",
749 i3cbus->scl_rate.i2c, i3cbus->scl_rate.i3c);
752 * I3C/I2C frequency may have been overridden, check that user-provided
755 if (i3cbus->scl_rate.i3c > I3C_BUS_MAX_I3C_SCL_RATE ||
756 i3cbus->scl_rate.i2c > I3C_BUS_I2C_FM_PLUS_SCL_RATE)
757 return -EINVAL;
771 return &master->i2c;
787 return ERR_PTR(-ENOMEM);
789 dev->common.master = master;
790 dev->addr = addr;
791 dev->lvr = lvr;
799 dest->addr = addr;
800 dest->payload.len = payloadlen;
802 dest->payload.data = kzalloc(payloadlen, GFP_KERNEL);
804 dest->payload.data = NULL;
806 return dest->payload.data;
811 kfree(dest->payload.data);
818 cmd->rnw = rnw ? 1 : 0;
819 cmd->id = id;
820 cmd->dests = dests;
821 cmd->ndests = ndests;
822 cmd->err = I3C_ERROR_UNKNOWN;
831 return -EINVAL;
833 if (WARN_ON(master->init_done &&
834 !rwsem_is_locked(&master->bus.lock)))
835 return -EINVAL;
837 if (!master->ops->send_ccc_cmd)
838 return -ENOTSUPP;
840 if ((cmd->id & I3C_CCC_DIRECT) && (!cmd->dests || !cmd->ndests))
841 return -EINVAL;
843 if (master->ops->supports_ccc_cmd &&
844 !master->ops->supports_ccc_cmd(master, cmd))
845 return -ENOTSUPP;
847 ret = master->ops->send_ccc_cmd(master, cmd);
849 if (cmd->err != I3C_ERROR_UNKNOWN)
850 return cmd->err;
864 i3c_bus_for_each_i2cdev(&master->bus, dev) {
865 if (dev->addr == addr)
873 * i3c_master_get_free_addr() - get a free address on the bus
874 * @master: I3C master object
879 * Return: the first free address starting at @start_addr (included) or -ENOMEM
885 return i3c_bus_get_free_addr(&master->bus, start_addr);
893 WARN_ON(i3cdev->desc);
895 of_node_put(i3cdev->dev.of_node);
912 return ERR_PTR(-ENOMEM);
914 dev->common.master = master;
915 dev->info = *info;
916 mutex_init(&dev->ibi_lock);
930 return -EINVAL;
932 addrstat = i3c_bus_get_addr_slot_status(&master->bus, addr);
934 return -EINVAL;
947 * i3c_master_entdaa_locked() - start a DAA (Dynamic Address Assignment)
954 * behind dynamic address assignment has to be handled in the I3C master
959 * Return: 0 in case of success, a positive I3C error code if the error is
987 return -ENOMEM;
989 events->events = evts;
1002 * i3c_master_disec_locked() - send a DISEC CCC command
1004 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
1012 * Return: 0 in case of success, a positive I3C error code if the error is
1023 * i3c_master_enec_locked() - send an ENEC CCC command
1025 * @addr: a valid I3C slave address or %I3C_BROADCAST_ADDR
1033 * Return: 0 in case of success, a positive I3C error code if the error is
1044 * i3c_master_defslvs_locked() - send a DEFSLVS CCC command
1051 * This should be called after all I3C devices have been discovered (in other
1053 * &i3c_master_controller_ops->bus_init().
1054 * It should also be called if a master ACKed an Hot-Join request and assigned
1059 * Return: 0 in case of success, a positive I3C error code if the error is
1075 return -EINVAL;
1081 if (i3cdev == master->this)
1084 if (I3C_BCR_DEVICE_ROLE(i3cdev->info.bcr) ==
1098 ndevs - 1));
1100 return -ENOMEM;
1102 defslvs->count = ndevs;
1103 defslvs->master.bcr = master->this->info.bcr;
1104 defslvs->master.dcr = master->this->info.dcr;
1105 defslvs->master.dyn_addr = master->this->info.dyn_addr << 1;
1106 defslvs->master.static_addr = I3C_BROADCAST_ADDR << 1;
1108 desc = defslvs->slaves;
1110 desc->lvr = i2cdev->lvr;
1111 desc->static_addr = i2cdev->addr << 1;
1116 /* Skip the I3C dev representing this master. */
1117 if (i3cdev == master->this)
1120 desc->bcr = i3cdev->info.bcr;
1121 desc->dcr = i3cdev->info.dcr;
1122 desc->dyn_addr = i3cdev->info.dyn_addr << 1;
1123 desc->static_addr = i3cdev->info.static_addr << 1;
1144 return -EINVAL;
1148 return -ENOMEM;
1150 setda->addr = newaddr << 1;
1180 mrl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mrl));
1182 return -ENOMEM;
1188 if (!(info->bcr & I3C_BCR_IBI_PAYLOAD))
1189 dest.payload.len -= 1;
1198 info->max_ibi_len = mrl->ibi_len;
1201 info->max_read_len = be16_to_cpu(mrl->read_len);
1204 ret = -EIO;
1222 mwl = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*mwl));
1224 return -ENOMEM;
1232 ret = -EIO;
1236 info->max_write_len = be16_to_cpu(mwl->len);
1252 getmaxds = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr,
1255 return -ENOMEM;
1263 ret = -EIO;
1267 info->max_read_ds = getmaxds->maxrd;
1268 info->max_write_ds = getmaxds->maxwr;
1270 info->max_read_turnaround = getmaxds->maxrdturn[0] |
1271 ((u32)getmaxds->maxrdturn[1] << 8) |
1272 ((u32)getmaxds->maxrdturn[2] << 16);
1288 gethdrcap = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr,
1291 return -ENOMEM;
1299 ret = -EIO;
1303 info->hdr_cap = gethdrcap->modes;
1319 getpid = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getpid));
1321 return -ENOMEM;
1328 info->pid = 0;
1329 for (i = 0; i < sizeof(getpid->pid); i++) {
1330 int sft = (sizeof(getpid->pid) - i - 1) * 8;
1332 info->pid |= (u64)getpid->pid[i] << sft;
1349 getbcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getbcr));
1351 return -ENOMEM;
1358 info->bcr = getbcr->bcr;
1374 getdcr = i3c_ccc_cmd_dest_init(&dest, info->dyn_addr, sizeof(*getdcr));
1376 return -ENOMEM;
1383 info->dcr = getdcr->dcr;
1397 if (!dev->info.dyn_addr)
1398 return -EINVAL;
1400 slot_status = i3c_bus_get_addr_slot_status(&master->bus,
1401 dev->info.dyn_addr);
1404 return -EINVAL;
1406 ret = i3c_master_getpid_locked(master, &dev->info);
1410 ret = i3c_master_getbcr_locked(master, &dev->info);
1414 ret = i3c_master_getdcr_locked(master, &dev->info);
1418 if (dev->info.bcr & I3C_BCR_MAX_DATA_SPEED_LIM) {
1419 ret = i3c_master_getmxds_locked(master, &dev->info);
1424 if (dev->info.bcr & I3C_BCR_IBI_PAYLOAD)
1425 dev->info.max_ibi_len = 1;
1427 i3c_master_getmrl_locked(master, &dev->info);
1428 i3c_master_getmwl_locked(master, &dev->info);
1430 if (dev->info.bcr & I3C_BCR_HDR_CAP) {
1431 ret = i3c_master_gethdrcap_locked(master, &dev->info);
1443 if (dev->info.static_addr)
1444 i3c_bus_set_addr_slot_status(&master->bus,
1445 dev->info.static_addr,
1448 if (dev->info.dyn_addr)
1449 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr,
1452 if (dev->boardinfo && dev->boardinfo->init_dyn_addr)
1453 i3c_bus_set_addr_slot_status(&master->bus, dev->boardinfo->init_dyn_addr,
1462 if (!dev->info.static_addr && !dev->info.dyn_addr)
1465 if (dev->info.static_addr) {
1466 status = i3c_bus_get_addr_slot_status(&master->bus,
1467 dev->info.static_addr);
1472 dev->info.static_addr != dev->boardinfo->init_dyn_addr)
1473 return -EBUSY;
1475 i3c_bus_set_addr_slot_status(&master->bus,
1476 dev->info.static_addr,
1481 * ->init_dyn_addr should have been reserved before that, so, if we're
1482 * trying to apply a pre-reserved dynamic address, we should not try
1485 if (dev->info.dyn_addr &&
1486 (!dev->boardinfo ||
1487 dev->boardinfo->init_dyn_addr != dev->info.dyn_addr)) {
1488 status = i3c_bus_get_addr_slot_status(&master->bus,
1489 dev->info.dyn_addr);
1493 i3c_bus_set_addr_slot_status(&master->bus, dev->info.dyn_addr,
1500 if (dev->info.static_addr)
1501 i3c_bus_set_addr_slot_status(&master->bus,
1502 dev->info.static_addr,
1505 return -EBUSY;
1517 if (!dev->info.static_addr && !dev->info.dyn_addr)
1525 if (master->this != dev && master->ops->attach_i3c_dev) {
1526 ret = master->ops->attach_i3c_dev(dev);
1533 list_add_tail(&dev->common.node, &master->bus.devs.i3c);
1544 if (dev->info.dyn_addr != old_dyn_addr) {
1545 i3c_bus_set_addr_slot_status(&master->bus,
1546 dev->info.dyn_addr,
1549 i3c_bus_set_addr_slot_status(&master->bus, old_dyn_addr,
1553 if (master->ops->reattach_i3c_dev) {
1554 ret = master->ops->reattach_i3c_dev(dev, old_dyn_addr);
1569 if (master->this != dev && master->ops->detach_i3c_dev)
1570 master->ops->detach_i3c_dev(dev);
1573 list_del(&dev->common.node);
1581 if (master->ops->attach_i2c_dev) {
1582 ret = master->ops->attach_i2c_dev(dev);
1587 list_add_tail(&dev->common.node, &master->bus.devs.i2c);
1596 list_del(&dev->common.node);
1598 if (master->ops->detach_i2c_dev)
1599 master->ops->detach_i2c_dev(dev);
1606 .static_addr = boardinfo->static_addr,
1607 .pid = boardinfo->pid,
1614 return -ENOMEM;
1616 i3cdev->boardinfo = boardinfo;
1622 ret = i3c_master_setdasa_locked(master, i3cdev->info.static_addr,
1623 i3cdev->boardinfo->init_dyn_addr);
1627 i3cdev->info.dyn_addr = i3cdev->boardinfo->init_dyn_addr;
1639 i3c_master_rstdaa_locked(master, i3cdev->boardinfo->init_dyn_addr);
1654 if (!master->init_done)
1657 i3c_bus_for_each_i3cdev(&master->bus, desc) {
1658 if (desc->dev || !desc->info.dyn_addr || desc == master->this)
1661 desc->dev = kzalloc(sizeof(*desc->dev), GFP_KERNEL);
1662 if (!desc->dev)
1665 desc->dev->bus = &master->bus;
1666 desc->dev->desc = desc;
1667 desc->dev->dev.parent = &master->dev;
1668 desc->dev->dev.type = &i3c_device_type;
1669 desc->dev->dev.bus = &i3c_bus_type;
1670 desc->dev->dev.release = i3c_device_release;
1671 dev_set_name(&desc->dev->dev, "%d-%llx", master->bus.id,
1672 desc->info.pid);
1674 if (desc->boardinfo)
1675 desc->dev->dev.of_node = desc->boardinfo->of_node;
1677 ret = device_register(&desc->dev->dev);
1679 dev_err(&master->dev,
1680 "Failed to add I3C device (err = %d)\n", ret);
1681 put_device(&desc->dev->dev);
1687 * i3c_master_do_daa() - do a DAA (Dynamic Address Assignment)
1690 * This function is instantiating an I3C device object and adding it to the
1691 * I3C device list. All device information are automatically retrieved using
1694 * The I3C device object is returned in case the master wants to attach
1705 i3c_bus_maintenance_lock(&master->bus);
1706 ret = master->ops->do_daa(master);
1707 i3c_bus_maintenance_unlock(&master->bus);
1712 i3c_bus_normaluse_lock(&master->bus);
1714 i3c_bus_normaluse_unlock(&master->bus);
1721 * i3c_master_set_info() - set master device information
1723 * @info: I3C device information
1726 * &i3c_master_controller_ops->bus_init().
1731 * - &i3c_device_info->dyn_addr
1732 * - &i3c_device_info->bcr
1733 * - &i3c_device_info->dcr
1734 * - &i3c_device_info->pid
1735 * - &i3c_device_info->hdr_cap if %I3C_BCR_HDR_CAP bit is set in
1736 * &i3c_device_info->bcr
1741 * information can be checked, but we can at least make sure @info->dyn_addr
1742 * and @info->bcr are correct), -EINVAL otherwise.
1750 if (!i3c_bus_dev_addr_is_avail(&master->bus, info->dyn_addr))
1751 return -EINVAL;
1753 if (I3C_BCR_DEVICE_ROLE(info->bcr) == I3C_BCR_I3C_MASTER &&
1754 master->secondary)
1755 return -EINVAL;
1757 if (master->this)
1758 return -EINVAL;
1764 master->this = i3cdev;
1765 master->bus.cur_master = master->this;
1785 list_for_each_entry_safe(i3cdev, i3ctmp, &master->bus.devs.i3c,
1789 if (i3cdev->boardinfo && i3cdev->boardinfo->init_dyn_addr)
1790 i3c_bus_set_addr_slot_status(&master->bus,
1791 i3cdev->boardinfo->init_dyn_addr,
1797 list_for_each_entry_safe(i2cdev, i2ctmp, &master->bus.devs.i2c,
1800 i3c_bus_set_addr_slot_status(&master->bus,
1801 i2cdev->addr,
1808 * i3c_master_bus_init() - initialize an I3C bus
1811 * This function is following all initialisation steps described in the I3C
1817 * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
1827 * 5. Reserve address slots for I3C devices with init_dyn_addr. And if devices
1828 * also have static_addr, try to pre-assign dynamic addresses requested by
1829 * the FW with SETDASA and attach corresponding statically defined I3C
1833 * remaining I3C devices
1835 * Once this is done, all I3C and I2C devices should be usable.
1851 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
1852 status = i3c_bus_get_addr_slot_status(&master->bus,
1853 i2cboardinfo->base.addr);
1855 ret = -EBUSY;
1859 i3c_bus_set_addr_slot_status(&master->bus,
1860 i2cboardinfo->base.addr,
1864 i2cboardinfo->base.addr,
1865 i2cboardinfo->lvr);
1879 * Now execute the controller specific ->bus_init() routine, which
1882 ret = master->ops->bus_init(master);
1887 * The master device should have been instantiated in ->bus_init(),
1890 if (!master->this) {
1891 dev_err(&master->dev,
1892 "master_set_info() was not called in ->bus_init()\n");
1893 ret = -EINVAL;
1897 if (master->ops->set_speed) {
1898 ret = master->ops->set_speed(master, I3C_OPEN_DRAIN_SLOW_SPEED);
1911 if (master->ops->set_speed) {
1912 ret = master->ops->set_speed(master, I3C_OPEN_DRAIN_NORMAL_SPEED);
1925 * Reserve init_dyn_addr first, and then try to pre-assign dynamic
1927 * In case pre-assign dynamic address fails, setting dynamic address to
1931 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) {
1937 if (!i3cboardinfo->init_dyn_addr)
1940 ret = i3c_bus_get_addr_slot_status(&master->bus,
1941 i3cboardinfo->init_dyn_addr);
1943 ret = -EBUSY;
1948 i3c_bus_set_addr_slot_status_mask(&master->bus,
1949 i3cboardinfo->init_dyn_addr,
1961 if (i3cboardinfo->static_addr)
1975 if (master->ops->bus_cleanup)
1976 master->ops->bus_cleanup(master);
1986 if (master->ops->bus_cleanup)
1987 master->ops->bus_cleanup(master);
1994 struct i3c_master_controller *master = i3cdev->common.master;
1997 list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) {
1998 if (i3cdev->info.pid != i3cboardinfo->pid)
2001 i3cdev->boardinfo = i3cboardinfo;
2002 i3cdev->info.static_addr = i3cboardinfo->static_addr;
2013 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) {
2014 if (i3cdev != refdev && i3cdev->info.pid == refdev->info.pid)
2022 * i3c_master_add_i3c_dev_locked() - add an I3C slave to the bus
2024 * @addr: I3C slave dynamic address assigned to the device
2026 * This function is instantiating an I3C device object and adding it to the
2027 * I3C device list. All device information are automatically retrieved using
2030 * The I3C device object is returned in case the master wants to attach
2048 return -EINVAL;
2066 newdev->dev = olddev->dev;
2067 if (newdev->dev)
2068 newdev->dev->desc = newdev;
2076 mutex_lock(&olddev->ibi_lock);
2077 if (olddev->ibi) {
2078 ibireq.handler = olddev->ibi->handler;
2079 ibireq.max_payload_len = olddev->ibi->max_payload_len;
2080 ibireq.num_slots = olddev->ibi->num_slots;
2082 if (olddev->ibi->enabled)
2086 * i3c bus as it does not exist and has been assigned
2088 * So, update the olddev->ibi->enabled flag to false
2091 olddev->ibi->enabled = false;
2094 mutex_unlock(&olddev->ibi_lock);
2096 old_dyn_addr = olddev->info.dyn_addr;
2105 * - if the device already had a dynamic address assigned, let's try to
2106 * re-apply this one
2107 * - if the device did not have a dynamic address and the firmware
2109 * - in any other case, keep the address automatically assigned by the
2112 if (old_dyn_addr && old_dyn_addr != newdev->info.dyn_addr)
2114 else if (newdev->boardinfo && newdev->boardinfo->init_dyn_addr)
2115 expected_dyn_addr = newdev->boardinfo->init_dyn_addr;
2117 expected_dyn_addr = newdev->info.dyn_addr;
2119 if (newdev->info.dyn_addr != expected_dyn_addr &&
2120 i3c_bus_get_addr_slot_status(&master->bus, expected_dyn_addr) == I3C_ADDR_SLOT_FREE) {
2126 newdev->info.dyn_addr,
2129 old_dyn_addr = newdev->info.dyn_addr;
2130 newdev->info.dyn_addr = expected_dyn_addr;
2133 dev_err(&master->dev,
2135 master->bus.id, newdev->info.pid);
2147 mutex_lock(&newdev->ibi_lock);
2150 dev_err(&master->dev,
2151 "Failed to request IBI on device %d-%llx",
2152 master->bus.id, newdev->info.pid);
2156 dev_err(&master->dev,
2157 "Failed to re-enable IBI on device %d-%llx",
2158 master->bus.id, newdev->info.pid);
2160 mutex_unlock(&newdev->ibi_lock);
2166 if (newdev->dev && newdev->dev->desc)
2167 newdev->dev->desc = NULL;
2185 struct device *dev = &master->dev;
2190 return -ENOMEM;
2192 ret = of_i2c_get_board_info(dev, node, &boardinfo->base);
2197 * The I3C Specification does not clearly say I2C devices with 10-bit
2201 if (boardinfo->base.flags & I2C_CLIENT_TEN) {
2203 return -ENOTSUPP;
2207 boardinfo->lvr = reg[2];
2209 list_add_tail(&boardinfo->node, &master->boardinfo.i2c);
2220 struct device *dev = &master->dev;
2226 return -ENOMEM;
2230 return -EINVAL;
2232 addrstatus = i3c_bus_get_addr_slot_status(&master->bus,
2235 return -EINVAL;
2238 boardinfo->static_addr = reg[0];
2240 if (!of_property_read_u32(node, "assigned-address", &init_dyn_addr)) {
2242 return -EINVAL;
2244 addrstatus = i3c_bus_get_addr_slot_status(&master->bus,
2247 return -EINVAL;
2250 boardinfo->pid = ((u64)reg[1] << 32) | reg[2];
2252 if ((boardinfo->pid & GENMASK_ULL(63, 48)) ||
2253 I3C_PID_RND_LOWER_32BITS(boardinfo->pid))
2254 return -EINVAL;
2256 boardinfo->init_dyn_addr = init_dyn_addr;
2257 boardinfo->of_node = of_node_get(node);
2258 list_add_tail(&boardinfo->node, &master->boardinfo.i3c);
2270 return -EINVAL;
2290 struct device *dev = &master->dev;
2291 struct device_node *i3cbus_np = dev->of_node;
2308 * The user might want to limit I2C and I3C speed in case some devices
2312 if (!of_property_read_u32(i3cbus_np, "i2c-scl-hz", &val))
2313 master->bus.scl_rate.i2c = val;
2315 if (!of_property_read_u32(i3cbus_np, "i3c-scl-hz", &val))
2316 master->bus.scl_rate.i3c = val;
2330 return -EINVAL;
2332 if (!master->ops->i2c_xfers)
2333 return -ENOTSUPP;
2339 return -ENOTSUPP;
2342 i3c_bus_normaluse_lock(&master->bus);
2345 ret = -ENOENT;
2347 ret = master->ops->i2c_xfers(dev, xfers, nxfers);
2348 i3c_bus_normaluse_unlock(&master->bus);
2363 if (client->dev.of_node) {
2366 if (!of_property_read_u32_array(client->dev.of_node, "reg",
2382 if (i3c_master_find_i2c_dev_by_addr(master, client->addr))
2385 status = i3c_bus_get_addr_slot_status(&master->bus, client->addr);
2387 return -EBUSY;
2389 i3c_bus_set_addr_slot_status(&master->bus, client->addr,
2392 i2cdev = i3c_master_alloc_i2c_dev(master, client->addr,
2408 i3c_bus_set_addr_slot_status(&master->bus, client->addr,
2419 dev = i3c_master_find_i2c_dev_by_addr(master, client->addr);
2421 return -ENODEV;
2424 i3c_bus_set_addr_slot_status(&master->bus, dev->addr,
2445 if (dev->type != &i2c_client_type)
2449 adap = client->adapter;
2451 if (adap->algo != &i3c_master_i2c_algo)
2456 i3c_bus_maintenance_lock(&master->bus);
2465 i3c_bus_maintenance_unlock(&master->bus);
2481 adap->dev.parent = master->dev.parent;
2482 adap->owner = master->dev.parent->driver->owner;
2483 adap->algo = &i3c_master_i2c_algo;
2484 strncpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name));
2486 /* FIXME: Should we allow i3c masters to override these values? */
2487 adap->timeout = 1000;
2488 adap->retries = 3;
2498 list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
2500 i2cboardinfo->base.addr);
2503 i2cdev->dev = i2c_new_client_device(adap, &i2cboardinfo->base);
2513 i2c_del_adapter(&master->i2c);
2515 i3c_bus_for_each_i2cdev(&master->bus, i2cdev)
2516 i2cdev->dev = NULL;
2523 i3c_bus_for_each_i3cdev(&master->bus, i3cdev) {
2524 if (!i3cdev->dev)
2527 i3cdev->dev->desc = NULL;
2528 if (device_is_registered(&i3cdev->dev->dev))
2529 device_unregister(&i3cdev->dev->dev);
2531 put_device(&i3cdev->dev->dev);
2532 i3cdev->dev = NULL;
2537 * i3c_master_queue_ibi() - Queue an IBI
2546 atomic_inc(&dev->ibi->pending_ibis);
2547 queue_work(dev->common.master->wq, &slot->work);
2555 struct i3c_dev_desc *dev = slot->dev;
2559 payload.data = slot->data;
2560 payload.len = slot->len;
2562 if (dev->dev)
2563 dev->ibi->handler(dev->dev, &payload);
2565 master->ops->recycle_ibi_slot(dev, slot);
2566 if (atomic_dec_and_test(&dev->ibi->pending_ibis))
2567 complete(&dev->ibi->all_ibis_handled);
2573 slot->dev = dev;
2574 INIT_WORK(&slot->work, i3c_master_handle_ibi);
2592 * i3c_generic_ibi_free_pool() - Free a generic IBI pool
2602 while (!list_empty(&pool->free_slots)) {
2603 slot = list_first_entry(&pool->free_slots,
2605 list_del(&slot->node);
2613 WARN_ON(nslots != pool->num_slots);
2615 kfree(pool->payload_buf);
2616 kfree(pool->slots);
2622 * i3c_generic_ibi_alloc_pool() - Create a generic IBI pool
2641 return ERR_PTR(-ENOMEM);
2643 spin_lock_init(&pool->lock);
2644 INIT_LIST_HEAD(&pool->free_slots);
2645 INIT_LIST_HEAD(&pool->pending);
2647 pool->slots = kcalloc(req->num_slots, sizeof(*slot), GFP_KERNEL);
2648 if (!pool->slots) {
2649 ret = -ENOMEM;
2653 if (req->max_payload_len) {
2654 pool->payload_buf = kcalloc(req->num_slots,
2655 req->max_payload_len, GFP_KERNEL);
2656 if (!pool->payload_buf) {
2657 ret = -ENOMEM;
2662 for (i = 0; i < req->num_slots; i++) {
2663 slot = &pool->slots[i];
2664 i3c_master_init_ibi_slot(dev, &slot->base);
2666 if (req->max_payload_len)
2667 slot->base.data = pool->payload_buf +
2668 (i * req->max_payload_len);
2670 list_add_tail(&slot->node, &pool->free_slots);
2671 pool->num_slots++;
2683 * i3c_generic_ibi_get_free_slot() - Get a free slot from a generic IBI pool
2698 spin_lock_irqsave(&pool->lock, flags);
2699 slot = list_first_entry_or_null(&pool->free_slots,
2702 list_del(&slot->node);
2703 spin_unlock_irqrestore(&pool->lock, flags);
2705 return slot ? &slot->base : NULL;
2710 * i3c_generic_ibi_recycle_slot() - Return a slot to a generic IBI pool
2715 * master driver struct_master_controller_ops->recycle_ibi() method.
2727 spin_lock_irqsave(&pool->lock, flags);
2728 list_add_tail(&slot->node, &pool->free_slots);
2729 spin_unlock_irqrestore(&pool->lock, flags);
2735 if (!ops || !ops->bus_init || !ops->priv_xfers ||
2736 !ops->send_ccc_cmd || !ops->do_daa || !ops->i2c_xfers)
2737 return -EINVAL;
2739 if (ops->request_ibi &&
2740 (!ops->enable_ibi || !ops->disable_ibi || !ops->free_ibi ||
2741 !ops->recycle_ibi_slot))
2742 return -EINVAL;
2748 * i3c_master_register() - register an I3C master
2750 * @parent: the parent device (the one that provides this I3C master
2754 * -ENOTSUPP if set to true since secondary masters are not yet
2759 * - creates and initializes the I3C bus
2760 * - populates the bus with static I2C devs if @parent->of_node is not
2762 * - registers all I3C devices added by the controller during bus
2764 * - registers the I2C adapter and all I2C devices
2781 return -ENOTSUPP;
2787 master->dev.parent = parent;
2788 master->dev.of_node = of_node_get(parent->of_node);
2789 master->dev.bus = &i3c_bus_type;
2790 master->dev.type = &i3c_masterdev_type;
2791 master->dev.release = i3c_masterdev_release;
2792 master->ops = ops;
2793 master->secondary = secondary;
2794 INIT_LIST_HEAD(&master->boardinfo.i2c);
2795 INIT_LIST_HEAD(&master->boardinfo.i3c);
2797 ret = i3c_bus_init(i3cbus, master->dev.of_node);
2801 device_initialize(&master->dev);
2802 dev_set_name(&master->dev, "i3c-%d", i3cbus->id);
2808 list_for_each_entry(i2cbi, &master->boardinfo.i2c, node) {
2809 switch (i2cbi->lvr & I3C_LVR_I2C_INDEX_MASK) {
2823 ret = -EINVAL;
2827 if (i2cbi->lvr & I3C_LVR_I2C_FM_MODE)
2835 master->wq = alloc_workqueue("%s", 0, 0, dev_name(parent));
2836 if (!master->wq) {
2837 ret = -ENOMEM;
2845 ret = device_add(&master->dev);
2850 * Expose our I3C bus as an I2C adapter so that I2C devices are exposed
2861 * register I3C devices discovered during the initial DAA.
2863 master->init_done = true;
2864 i3c_bus_normaluse_lock(&master->bus);
2866 i3c_bus_normaluse_unlock(&master->bus);
2871 device_del(&master->dev);
2877 put_device(&master->dev);
2884 * i3c_master_unregister() - unregister an I3C master
2891 i3c_bus_notify(&master->bus, I3C_NOTIFY_BUS_REMOVE);
2896 device_unregister(&master->dev);
2905 return -ENOENT;
2909 return -EINVAL;
2911 if (!dev->boardinfo || !dev->boardinfo->init_dyn_addr ||
2912 !dev->boardinfo->static_addr)
2913 return -EINVAL;
2915 return i3c_master_setdasa_locked(master, dev->info.static_addr,
2916 dev->boardinfo->init_dyn_addr);
2926 return -ENOENT;
2930 return -EINVAL;
2932 if (!master->ops->priv_xfers)
2933 return -ENOTSUPP;
2935 return master->ops->priv_xfers(dev, xfers, nxfers);
2943 if (!dev->ibi)
2944 return -EINVAL;
2947 ret = master->ops->disable_ibi(dev);
2951 reinit_completion(&dev->ibi->all_ibis_handled);
2952 if (atomic_read(&dev->ibi->pending_ibis))
2953 wait_for_completion(&dev->ibi->all_ibis_handled);
2955 dev->ibi->enabled = false;
2965 if (!dev->ibi)
2966 return -EINVAL;
2968 ret = master->ops->enable_ibi(dev);
2970 dev->ibi->enabled = true;
2982 if (!master->ops->request_ibi)
2983 return -ENOTSUPP;
2985 if (dev->ibi)
2986 return -EBUSY;
2990 return -ENOMEM;
2992 atomic_set(&ibi->pending_ibis, 0);
2993 init_completion(&ibi->all_ibis_handled);
2994 ibi->handler = req->handler;
2995 ibi->max_payload_len = req->max_payload_len;
2996 ibi->num_slots = req->num_slots;
2998 dev->ibi = ibi;
2999 ret = master->ops->request_ibi(dev, req);
3002 dev->ibi = NULL;
3012 if (!dev->ibi)
3015 if (WARN_ON(dev->ibi->enabled))
3018 master->ops->free_ibi(dev);
3019 kfree(dev->ibi);
3020 dev->ibi = NULL;
3027 res = of_alias_get_highest_id("i3c");
3060 MODULE_DESCRIPTION("I3C core");