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
18 enum turris_mox_cpu_module_id {
19 TURRIS_MOX_CPU_ID_EMMC = 0x00,
20 TURRIS_MOX_CPU_ID_SD = 0x10,
21 };
22
23 enum 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
38 struct moxtet {
39 struct device *dev;
40 struct mutex lock;
41 u8 modules[TURRIS_MOX_MAX_MODULES];
42 int count;
43 u8 tx[TURRIS_MOX_MAX_MODULES];
44 int dev_irq;
45 struct {
46 struct irq_domain *domain;
47 struct irq_chip chip;
48 unsigned long masked, exists;
49 struct moxtet_irqpos {
50 u8 idx;
51 u8 bit;
52 } position[MOXTET_NIRQS];
53 } irq;
54 #ifdef CONFIG_DEBUG_FS
55 struct dentry *debugfs_root;
56 #endif
57 };
58
59 struct moxtet_driver {
60 const enum turris_mox_module_id *id_table;
61 struct device_driver driver;
62 };
63
64 #define to_moxtet_driver(__drv) \
65 ( __drv ? container_of_const(__drv, struct moxtet_driver, driver) : NULL )
66
67 extern int __moxtet_register_driver(struct module *owner,
68 struct moxtet_driver *mdrv);
69
moxtet_unregister_driver(struct moxtet_driver * mdrv)70 static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv)
71 {
72 if (mdrv)
73 driver_unregister(&mdrv->driver);
74 }
75
76 #define moxtet_register_driver(driver) \
77 __moxtet_register_driver(THIS_MODULE, driver)
78
79 #define module_moxtet_driver(__moxtet_driver) \
80 module_driver(__moxtet_driver, moxtet_register_driver, \
81 moxtet_unregister_driver)
82
83 struct moxtet_device {
84 struct device dev;
85 struct moxtet *moxtet;
86 enum turris_mox_module_id id;
87 unsigned int idx;
88 };
89
90 extern int moxtet_device_read(struct device *dev);
91 extern int moxtet_device_write(struct device *dev, u8 val);
92 extern int moxtet_device_written(struct device *dev);
93
94 static inline struct moxtet_device *
to_moxtet_device(struct device * dev)95 to_moxtet_device(struct device *dev)
96 {
97 if (!dev)
98 return NULL;
99 return container_of(dev, struct moxtet_device, dev);
100 }
101
102 #endif /* __LINUX_MOXTET_H */
103