1
2#ifndef __NVKM_I2C_H__
3#define __NVKM_I2C_H__
4#include <core/subdev.h>
5#include <core/event.h>
6
7#include <subdev/bios.h>
8#include <subdev/bios/i2c.h>
9
10struct nvkm_i2c_ntfy_req {
11#define NVKM_I2C_PLUG 0x01
12#define NVKM_I2C_UNPLUG 0x02
13#define NVKM_I2C_IRQ 0x04
14#define NVKM_I2C_DONE 0x08
15#define NVKM_I2C_ANY 0x0f
16 u8 mask;
17 u8 port;
18};
19
20struct nvkm_i2c_ntfy_rep {
21 u8 mask;
22};
23
24struct nvkm_i2c_bus_probe {
25 struct i2c_board_info dev;
26 u8 udelay;
27};
28
29struct nvkm_i2c_bus {
30 const struct nvkm_i2c_bus_func *func;
31 struct nvkm_i2c_pad *pad;
32#define NVKM_I2C_BUS_CCB(n) (n)
33#define NVKM_I2C_BUS_EXT(n) ((n) + 0x100)
34#define NVKM_I2C_BUS_PRI -1
35#define NVKM_I2C_BUS_SEC -2
36 int id;
37
38 struct mutex mutex;
39 struct list_head head;
40 struct i2c_adapter i2c;
41};
42
43int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
44void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
45int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *,
46 struct nvkm_i2c_bus_probe *,
47 bool (*)(struct nvkm_i2c_bus *,
48 struct i2c_board_info *, void *), void *);
49
50struct nvkm_i2c_aux {
51 const struct nvkm_i2c_aux_func *func;
52 struct nvkm_i2c_pad *pad;
53#define NVKM_I2C_AUX_CCB(n) (n)
54#define NVKM_I2C_AUX_EXT(n) ((n) + 0x100)
55 int id;
56
57 struct mutex mutex;
58 struct list_head head;
59 struct i2c_adapter i2c;
60
61 u32 intr;
62};
63
64void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
65int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
66void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
67int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
68 u32 addr, u8 *data, u8 *size);
69int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
70 bool enhanced_framing);
71
72struct nvkm_i2c {
73 const struct nvkm_i2c_func *func;
74 struct nvkm_subdev subdev;
75
76 struct list_head pad;
77 struct list_head bus;
78 struct list_head aux;
79
80 struct nvkm_event event;
81};
82
83struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
84struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
85
86int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
87int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
88int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
89int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
90int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
91int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
92int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
93int gm200_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
94
95static inline int
96nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
97{
98 u8 val;
99 struct i2c_msg msgs[] = {
100 { .addr = addr, .flags = 0, .len = 1, .buf = ® },
101 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
102 };
103
104 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
105 if (ret != 2)
106 return -EIO;
107
108 return val;
109}
110
111static inline int
112nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
113{
114 u8 val[2];
115 struct i2c_msg msgs[] = {
116 { .addr = addr, .flags = 0, .len = 1, .buf = ® },
117 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val },
118 };
119
120 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
121 if (ret != 2)
122 return -EIO;
123
124 return val[0] << 8 | val[1];
125}
126
127static inline int
128nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val)
129{
130 u8 buf[2] = { reg, val };
131 struct i2c_msg msgs[] = {
132 { .addr = addr, .flags = 0, .len = 2, .buf = buf },
133 };
134
135 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
136 if (ret != 1)
137 return -EIO;
138
139 return 0;
140}
141
142static inline int
143nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val)
144{
145 u8 buf[3] = { reg, val >> 8, val & 0xff};
146 struct i2c_msg msgs[] = {
147 { .addr = addr, .flags = 0, .len = 3, .buf = buf },
148 };
149
150 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
151 if (ret != 1)
152 return -EIO;
153
154 return 0;
155}
156
157static inline bool
158nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
159{
160 return nvkm_rdi2cr(adap, addr, 0) >= 0;
161}
162
163static inline int
164nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
165{
166 const u8 xfer = size;
167 int ret = nvkm_i2c_aux_acquire(aux);
168 if (ret == 0) {
169 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size);
170 WARN_ON(!ret && size != xfer);
171 nvkm_i2c_aux_release(aux);
172 }
173 return ret;
174}
175
176static inline int
177nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
178{
179 int ret = nvkm_i2c_aux_acquire(aux);
180 if (ret == 0) {
181 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size);
182 nvkm_i2c_aux_release(aux);
183 }
184 return ret;
185}
186#endif
187
