1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Turris Mox module configuration bus driver
4 *
5 * Copyright (C) 2019 Marek Behún <kabel@kernel.org>
6 */
7
8#ifndef __LINUX_MOXTET_H
9#define __LINUX_MOXTET_H
10
11#include <linux/device.h>
12#include <linux/irq.h>
13#include <linux/irqdomain.h>
14#include <linux/mutex.h>
15
16#define TURRIS_MOX_MAX_MODULES 10
17
18enum turris_mox_cpu_module_id {
19 TURRIS_MOX_CPU_ID_EMMC = 0x00,
20 TURRIS_MOX_CPU_ID_SD = 0x10,
21};
22
23enum turris_mox_module_id {
24 TURRIS_MOX_MODULE_FIRST = 0x01,
25
26 TURRIS_MOX_MODULE_SFP = 0x01,
27 TURRIS_MOX_MODULE_PCI = 0x02,
28 TURRIS_MOX_MODULE_TOPAZ = 0x03,
29 TURRIS_MOX_MODULE_PERIDOT = 0x04,
30 TURRIS_MOX_MODULE_USB3 = 0x05,
31 TURRIS_MOX_MODULE_PCI_BRIDGE = 0x06,
32
33 TURRIS_MOX_MODULE_LAST = 0x06,
34};
35
36#define MOXTET_NIRQS 16
37
38extern struct bus_type moxtet_type;
39
40struct moxtet {
41 struct device *dev;
42 struct mutex lock;
43 u8 modules[TURRIS_MOX_MAX_MODULES];
44 int count;
45 u8 tx[TURRIS_MOX_MAX_MODULES];
46 int dev_irq;
47 struct {
48 struct irq_domain *domain;
49 struct irq_chip chip;
50 unsigned long masked, exists;
51 struct moxtet_irqpos {
52 u8 idx;
53 u8 bit;
54 } position[MOXTET_NIRQS];
55 } irq;
56#ifdef CONFIG_DEBUG_FS
57 struct dentry *debugfs_root;
58#endif
59};
60
61struct moxtet_driver {
62 const enum turris_mox_module_id *id_table;
63 struct device_driver driver;
64};
65
66static inline struct moxtet_driver *
67to_moxtet_driver(struct device_driver *drv)
68{
69 if (!drv)
70 return NULL;
71 return container_of(drv, struct moxtet_driver, driver);
72}
73
74extern int __moxtet_register_driver(struct module *owner,
75 struct moxtet_driver *mdrv);
76
77static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv)
78{
79 if (mdrv)
80 driver_unregister(drv: &mdrv->driver);
81}
82
83#define moxtet_register_driver(driver) \
84 __moxtet_register_driver(THIS_MODULE, driver)
85
86#define module_moxtet_driver(__moxtet_driver) \
87 module_driver(__moxtet_driver, moxtet_register_driver, \
88 moxtet_unregister_driver)
89
90struct moxtet_device {
91 struct device dev;
92 struct moxtet *moxtet;
93 enum turris_mox_module_id id;
94 unsigned int idx;
95};
96
97extern int moxtet_device_read(struct device *dev);
98extern int moxtet_device_write(struct device *dev, u8 val);
99extern int moxtet_device_written(struct device *dev);
100
101static inline struct moxtet_device *
102to_moxtet_device(struct device *dev)
103{
104 if (!dev)
105 return NULL;
106 return container_of(dev, struct moxtet_device, dev);
107}
108
109#endif /* __LINUX_MOXTET_H */
110

source code of linux/include/linux/moxtet.h