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 u8 enabled;
42};
43
44int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
45void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
46int nvkm_i2c_bus_probe(struct nvkm_i2c_bus *, const char *,
47 struct nvkm_i2c_bus_probe *,
48 bool (*)(struct nvkm_i2c_bus *,
49 struct i2c_board_info *, void *), void *);
50
51struct nvkm_i2c_aux {
52 const struct nvkm_i2c_aux_func *func;
53 struct nvkm_i2c_pad *pad;
54#define NVKM_I2C_AUX_CCB(n) (n)
55#define NVKM_I2C_AUX_EXT(n) ((n) + 0x100)
56 int id;
57
58 struct mutex mutex;
59 struct list_head head;
60 struct i2c_adapter i2c;
61 u8 enabled;
62
63 u32 intr;
64};
65
66void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
67int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
68void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
69int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
70 u32 addr, u8 *data, u8 *size);
71int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
72 bool enhanced_framing);
73
74struct nvkm_i2c {
75 const struct nvkm_i2c_func *func;
76 struct nvkm_subdev subdev;
77
78 struct list_head pad;
79 struct list_head bus;
80 struct list_head aux;
81
82 struct nvkm_event event;
83};
84
85struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
86struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
87
88int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
89int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
90int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
91int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
92int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
93int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
94int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
95int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
96int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
97
98static inline int
99nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
100{
101 u8 val;
102 struct i2c_msg msgs[] = {
103 { .addr = addr, .flags = 0, .len = 1, .buf = ® },
104 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
105 };
106
107 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
108 if (ret != 2)
109 return -EIO;
110
111 return val;
112}
113
114static inline int
115nv_rd16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
116{
117 u8 val[2];
118 struct i2c_msg msgs[] = {
119 { .addr = addr, .flags = 0, .len = 1, .buf = ® },
120 { .addr = addr, .flags = I2C_M_RD, .len = 2, .buf = val },
121 };
122
123 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
124 if (ret != 2)
125 return -EIO;
126
127 return val[0] << 8 | val[1];
128}
129
130static inline int
131nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val)
132{
133 u8 buf[2] = { reg, val };
134 struct i2c_msg msgs[] = {
135 { .addr = addr, .flags = 0, .len = 2, .buf = buf },
136 };
137
138 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
139 if (ret != 1)
140 return -EIO;
141
142 return 0;
143}
144
145static inline int
146nv_wr16i2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u16 val)
147{
148 u8 buf[3] = { reg, val >> 8, val & 0xff};
149 struct i2c_msg msgs[] = {
150 { .addr = addr, .flags = 0, .len = 3, .buf = buf },
151 };
152
153 int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
154 if (ret != 1)
155 return -EIO;
156
157 return 0;
158}
159
160static inline bool
161nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
162{
163 return nvkm_rdi2cr(adap, addr, 0) >= 0;
164}
165
166static inline int
167nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
168{
169 const u8 xfer = size;
170 int ret = nvkm_i2c_aux_acquire(aux);
171 if (ret == 0) {
172 ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, &size);
173 WARN_ON(!ret && size != xfer);
174 nvkm_i2c_aux_release(aux);
175 }
176 return ret;
177}
178
179static inline int
180nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
181{
182 int ret = nvkm_i2c_aux_acquire(aux);
183 if (ret == 0) {
184 ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, &size);
185 nvkm_i2c_aux_release(aux);
186 }
187 return ret;
188}
189#endif
190
