projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 0508ad1f JK |
1 | /* |
| 2 | * FSI core driver | |
| 3 | * | |
| 4 | * Copyright (C) IBM Corporation 2016 | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/device.h> | |
| 17 | #include <linux/fsi.h> | |
| 09aecfab | 18 | #include <linux/idr.h> |
| 0508ad1f JK |
19 | #include <linux/module.h> |
| 20 | ||
| 09aecfab JK |
21 | #include "fsi-master.h" |
| 22 | ||
| 23 | static DEFINE_IDA(master_ida); | |
| 24 | ||
| faf0b116 JK |
25 | struct fsi_slave { |
| 26 | struct device dev; | |
| 27 | struct fsi_master *master; | |
| 28 | int id; | |
| 29 | int link; | |
| 30 | uint32_t size; /* size of slave address space */ | |
| 31 | }; | |
| 32 | ||
| 33 | #define to_fsi_slave(d) container_of(d, struct fsi_slave, dev) | |
| 34 | ||
| 09aecfab JK |
35 | /* FSI master support */ |
| 36 | int fsi_master_register(struct fsi_master *master) | |
| 37 | { | |
| 38 | int rc; | |
| 39 | ||
| 40 | if (!master) | |
| 41 | return -EINVAL; | |
| 42 | ||
| 43 | master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL); | |
| 44 | dev_set_name(&master->dev, "fsi%d", master->idx); | |
| 45 | ||
| 46 | rc = device_register(&master->dev); | |
| 47 | if (rc) | |
| 48 | ida_simple_remove(&master_ida, master->idx); | |
| 49 | ||
| 50 | return rc; | |
| 51 | } | |
| 52 | EXPORT_SYMBOL_GPL(fsi_master_register); | |
| 53 | ||
| 54 | void fsi_master_unregister(struct fsi_master *master) | |
| 55 | { | |
| 56 | if (master->idx >= 0) { | |
| 57 | ida_simple_remove(&master_ida, master->idx); | |
| 58 | master->idx = -1; | |
| 59 | } | |
| 60 | ||
| 61 | device_unregister(&master->dev); | |
| 62 | } | |
| 63 | EXPORT_SYMBOL_GPL(fsi_master_unregister); | |
| 64 | ||
| 0508ad1f JK |
65 | /* FSI core & Linux bus type definitions */ |
| 66 | ||
| dd37eed7 JK |
67 | static int fsi_bus_match(struct device *dev, struct device_driver *drv) |
| 68 | { | |
| 69 | struct fsi_device *fsi_dev = to_fsi_dev(dev); | |
| 70 | struct fsi_driver *fsi_drv = to_fsi_drv(drv); | |
| 71 | const struct fsi_device_id *id; | |
| 72 | ||
| 73 | if (!fsi_drv->id_table) | |
| 74 | return 0; | |
| 75 | ||
| 76 | for (id = fsi_drv->id_table; id->engine_type; id++) { | |
| 77 | if (id->engine_type != fsi_dev->engine_type) | |
| 78 | continue; | |
| 79 | if (id->version == FSI_VERSION_ANY || | |
| 80 | id->version == fsi_dev->version) | |
| 81 | return 1; | |
| 82 | } | |
| 83 | ||
| 84 | return 0; | |
| 85 | } | |
| 86 | ||
| 0508ad1f JK |
87 | struct bus_type fsi_bus_type = { |
| 88 | .name = "fsi", | |
| dd37eed7 | 89 | .match = fsi_bus_match, |
| 0508ad1f JK |
90 | }; |
| 91 | EXPORT_SYMBOL_GPL(fsi_bus_type); | |
| 92 | ||
| 93 | static int fsi_init(void) | |
| 94 | { | |
| 95 | return bus_register(&fsi_bus_type); | |
| 96 | } | |
| 97 | ||
| 98 | static void fsi_exit(void) | |
| 99 | { | |
| 100 | bus_unregister(&fsi_bus_type); | |
| 101 | } | |
| 102 | ||
| 103 | module_init(fsi_init); | |
| 104 | module_exit(fsi_exit); |