This source file includes following definitions.
- nvkm_i2c_pad_mode_locked
- nvkm_i2c_pad_mode
- nvkm_i2c_pad_release
- nvkm_i2c_pad_acquire
- nvkm_i2c_pad_fini
- nvkm_i2c_pad_init
- nvkm_i2c_pad_del
- nvkm_i2c_pad_ctor
- nvkm_i2c_pad_new_
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24 #include "pad.h"
25
26 static void
27 nvkm_i2c_pad_mode_locked(struct nvkm_i2c_pad *pad, enum nvkm_i2c_pad_mode mode)
28 {
29 PAD_TRACE(pad, "-> %s", (mode == NVKM_I2C_PAD_AUX) ? "aux" :
30 (mode == NVKM_I2C_PAD_I2C) ? "i2c" : "off");
31 if (pad->func->mode)
32 pad->func->mode(pad, mode);
33 }
34
35 void
36 nvkm_i2c_pad_mode(struct nvkm_i2c_pad *pad, enum nvkm_i2c_pad_mode mode)
37 {
38 PAD_TRACE(pad, "mode %d", mode);
39 mutex_lock(&pad->mutex);
40 nvkm_i2c_pad_mode_locked(pad, mode);
41 pad->mode = mode;
42 mutex_unlock(&pad->mutex);
43 }
44
45 void
46 nvkm_i2c_pad_release(struct nvkm_i2c_pad *pad)
47 {
48 PAD_TRACE(pad, "release");
49 if (pad->mode == NVKM_I2C_PAD_OFF)
50 nvkm_i2c_pad_mode_locked(pad, pad->mode);
51 mutex_unlock(&pad->mutex);
52 }
53
54 int
55 nvkm_i2c_pad_acquire(struct nvkm_i2c_pad *pad, enum nvkm_i2c_pad_mode mode)
56 {
57 PAD_TRACE(pad, "acquire");
58 mutex_lock(&pad->mutex);
59 if (pad->mode != mode) {
60 if (pad->mode != NVKM_I2C_PAD_OFF) {
61 mutex_unlock(&pad->mutex);
62 return -EBUSY;
63 }
64 nvkm_i2c_pad_mode_locked(pad, mode);
65 }
66 return 0;
67 }
68
69 void
70 nvkm_i2c_pad_fini(struct nvkm_i2c_pad *pad)
71 {
72 PAD_TRACE(pad, "fini");
73 nvkm_i2c_pad_mode_locked(pad, NVKM_I2C_PAD_OFF);
74 }
75
76 void
77 nvkm_i2c_pad_init(struct nvkm_i2c_pad *pad)
78 {
79 PAD_TRACE(pad, "init");
80 nvkm_i2c_pad_mode_locked(pad, pad->mode);
81 }
82
83 void
84 nvkm_i2c_pad_del(struct nvkm_i2c_pad **ppad)
85 {
86 struct nvkm_i2c_pad *pad = *ppad;
87 if (pad) {
88 PAD_TRACE(pad, "dtor");
89 list_del(&pad->head);
90 kfree(pad);
91 pad = NULL;
92 }
93 }
94
95 void
96 nvkm_i2c_pad_ctor(const struct nvkm_i2c_pad_func *func, struct nvkm_i2c *i2c,
97 int id, struct nvkm_i2c_pad *pad)
98 {
99 pad->func = func;
100 pad->i2c = i2c;
101 pad->id = id;
102 pad->mode = NVKM_I2C_PAD_OFF;
103 mutex_init(&pad->mutex);
104 list_add_tail(&pad->head, &i2c->pad);
105 PAD_TRACE(pad, "ctor");
106 }
107
108 int
109 nvkm_i2c_pad_new_(const struct nvkm_i2c_pad_func *func, struct nvkm_i2c *i2c,
110 int id, struct nvkm_i2c_pad **ppad)
111 {
112 if (!(*ppad = kzalloc(sizeof(**ppad), GFP_KERNEL)))
113 return -ENOMEM;
114 nvkm_i2c_pad_ctor(func, i2c, id, *ppad);
115 return 0;
116 }