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7f86c765 FT |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Bus implementation for the NuBus subsystem. | |
4 | // | |
5 | // Copyright (C) 2017 Finn Thain | |
6 | ||
7 | #include <linux/device.h> | |
a8c5cb99 | 8 | #include <linux/dma-mapping.h> |
7f86c765 FT |
9 | #include <linux/list.h> |
10 | #include <linux/nubus.h> | |
11 | #include <linux/seq_file.h> | |
12 | #include <linux/slab.h> | |
13 | ||
14 | #define to_nubus_board(d) container_of(d, struct nubus_board, dev) | |
15 | #define to_nubus_driver(d) container_of(d, struct nubus_driver, driver) | |
16 | ||
17 | static int nubus_bus_match(struct device *dev, struct device_driver *driver) | |
18 | { | |
19 | return 1; | |
20 | } | |
21 | ||
22 | static int nubus_device_probe(struct device *dev) | |
23 | { | |
24 | struct nubus_driver *ndrv = to_nubus_driver(dev->driver); | |
25 | int err = -ENODEV; | |
26 | ||
27 | if (ndrv->probe) | |
28 | err = ndrv->probe(to_nubus_board(dev)); | |
29 | return err; | |
30 | } | |
31 | ||
fc7a6209 | 32 | static void nubus_device_remove(struct device *dev) |
7f86c765 FT |
33 | { |
34 | struct nubus_driver *ndrv = to_nubus_driver(dev->driver); | |
7f86c765 | 35 | |
f52c9ccb | 36 | if (ndrv->remove) |
fc7a6209 | 37 | ndrv->remove(to_nubus_board(dev)); |
7f86c765 FT |
38 | } |
39 | ||
40 | struct bus_type nubus_bus_type = { | |
41 | .name = "nubus", | |
42 | .match = nubus_bus_match, | |
43 | .probe = nubus_device_probe, | |
44 | .remove = nubus_device_remove, | |
45 | }; | |
46 | EXPORT_SYMBOL(nubus_bus_type); | |
47 | ||
48 | int nubus_driver_register(struct nubus_driver *ndrv) | |
49 | { | |
50 | ndrv->driver.bus = &nubus_bus_type; | |
51 | return driver_register(&ndrv->driver); | |
52 | } | |
53 | EXPORT_SYMBOL(nubus_driver_register); | |
54 | ||
55 | void nubus_driver_unregister(struct nubus_driver *ndrv) | |
56 | { | |
57 | driver_unregister(&ndrv->driver); | |
58 | } | |
59 | EXPORT_SYMBOL(nubus_driver_unregister); | |
60 | ||
61 | static struct device nubus_parent = { | |
62 | .init_name = "nubus", | |
63 | }; | |
64 | ||
bdeeed09 | 65 | static int __init nubus_bus_register(void) |
7f86c765 | 66 | { |
bdeeed09 FT |
67 | return bus_register(&nubus_bus_type); |
68 | } | |
69 | postcore_initcall(nubus_bus_register); | |
7f86c765 | 70 | |
bdeeed09 FT |
71 | int __init nubus_parent_device_register(void) |
72 | { | |
73 | return device_register(&nubus_parent); | |
7f86c765 FT |
74 | } |
75 | ||
76 | static void nubus_device_release(struct device *dev) | |
77 | { | |
78 | struct nubus_board *board = to_nubus_board(dev); | |
79 | struct nubus_rsrc *fres, *tmp; | |
80 | ||
81 | list_for_each_entry_safe(fres, tmp, &nubus_func_rsrcs, list) | |
82 | if (fres->board == board) { | |
83 | list_del(&fres->list); | |
84 | kfree(fres); | |
85 | } | |
86 | kfree(board); | |
87 | } | |
88 | ||
89 | int nubus_device_register(struct nubus_board *board) | |
90 | { | |
91 | board->dev.parent = &nubus_parent; | |
92 | board->dev.release = nubus_device_release; | |
93 | board->dev.bus = &nubus_bus_type; | |
94 | dev_set_name(&board->dev, "slot.%X", board->slot); | |
a8c5cb99 FT |
95 | board->dev.dma_mask = &board->dev.coherent_dma_mask; |
96 | dma_set_mask(&board->dev, DMA_BIT_MASK(32)); | |
7f86c765 FT |
97 | return device_register(&board->dev); |
98 | } | |
99 | ||
100 | static int nubus_print_device_name_fn(struct device *dev, void *data) | |
101 | { | |
102 | struct nubus_board *board = to_nubus_board(dev); | |
103 | struct seq_file *m = data; | |
104 | ||
105 | seq_printf(m, "Slot %X: %s\n", board->slot, board->name); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | int nubus_proc_show(struct seq_file *m, void *data) | |
110 | { | |
111 | return bus_for_each_dev(&nubus_bus_type, NULL, m, | |
112 | nubus_print_device_name_fn); | |
113 | } |