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
9 struct 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
19 struct nvkm_i2c_ntfy_rep {
20 u8 mask;
21 };
22
23 struct nvkm_i2c_bus_probe {
24 struct i2c_board_info dev;
25 u8 udelay; /* set to 0 to use the standard delay */
26 };
27
28 struct 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' is ccb index */ (n)
32 #define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100)
33 #define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1
34 #define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2
35 int id;
36
37 struct mutex mutex;
38 struct list_head head;
39 struct i2c_adapter i2c;
40 };
41
42 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
43 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
44 int 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
49 struct 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' is ccb index */ (n)
53 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((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
63 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
64 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
65 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
66 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
67 u32 addr, u8 *data, u8 size);
68 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
69 bool enhanced_framing);
70
71 struct 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
82 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
83 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
84
85 int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
86 int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
87 int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
88 int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
89 int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
90 int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
91 int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
92 int gm200_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
93
94 static inline int
nvkm_rdi2cr(struct i2c_adapter * adap,u8 addr,u8 reg)95 nvkm_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
110 static inline int
nv_rd16i2cr(struct i2c_adapter * adap,u8 addr,u8 reg)111 nv_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
126 static inline int
nvkm_wri2cr(struct i2c_adapter * adap,u8 addr,u8 reg,u8 val)127 nvkm_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
141 static inline int
nv_wr16i2cr(struct i2c_adapter * adap,u8 addr,u8 reg,u16 val)142 nv_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
156 static inline bool
nvkm_probe_i2c(struct i2c_adapter * adap,u8 addr)157 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
158 {
159 return nvkm_rdi2cr(adap, addr, 0) >= 0;
160 }
161
162 static inline int
nvkm_rdaux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)163 nvkm_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
173 static inline int
nvkm_wraux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)174 nvkm_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