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