1 /* SPDX-License-Identifier: MIT */
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
10 struct 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
20 struct nvkm_i2c_ntfy_rep {
21 u8 mask;
22 };
23
24 struct nvkm_i2c_bus_probe {
25 struct i2c_board_info dev;
26 u8 udelay; /* set to 0 to use the standard delay */
27 };
28
29 struct 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' is ccb index */ (n)
33 #define NVKM_I2C_BUS_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100)
34 #define NVKM_I2C_BUS_PRI /* ccb primary comm. port */ -1
35 #define NVKM_I2C_BUS_SEC /* ccb secondary comm. port */ -2
36 int id;
37
38 struct mutex mutex;
39 struct list_head head;
40 struct i2c_adapter i2c;
41 u8 enabled;
42 };
43
44 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
45 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
46 int 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
51 struct 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' is ccb index */ (n)
55 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((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
66 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
67 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
68 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
69 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
70 u32 addr, u8 *data, u8 *size);
71 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
72 bool enhanced_framing);
73
74 struct 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
85 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
86 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
87
88 int nv04_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
89 int nv4e_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
90 int nv50_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
91 int g94_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
92 int gf117_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
93 int gf119_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
94 int gk104_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
95 int gk110_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
96 int gm200_i2c_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_i2c **);
97
98 static inline int
nvkm_rdi2cr(struct i2c_adapter * adap,u8 addr,u8 reg)99 nvkm_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
114 static inline int
nv_rd16i2cr(struct i2c_adapter * adap,u8 addr,u8 reg)115 nv_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
130 static inline int
nvkm_wri2cr(struct i2c_adapter * adap,u8 addr,u8 reg,u8 val)131 nvkm_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
145 static inline int
nv_wr16i2cr(struct i2c_adapter * adap,u8 addr,u8 reg,u16 val)146 nv_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
160 static inline bool
nvkm_probe_i2c(struct i2c_adapter * adap,u8 addr)161 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
162 {
163 return nvkm_rdi2cr(adap, addr, 0) >= 0;
164 }
165
166 static inline int
nvkm_rdaux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)167 nvkm_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
179 static inline int
nvkm_wraux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)180 nvkm_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