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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 	u8 enabled;
41 };
42 
43 int nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *);
44 void nvkm_i2c_bus_release(struct nvkm_i2c_bus *);
45 int 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 
50 struct 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' is ccb index */                           (n)
54 #define NVKM_I2C_AUX_EXT(n) /* 'n' is dcb external encoder type */ ((n) + 0x100)
55 	int id;
56 
57 	struct mutex mutex;
58 	struct list_head head;
59 	struct i2c_adapter i2c;
60 	u8 enabled;
61 
62 	u32 intr;
63 };
64 
65 void nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *, bool monitor);
66 int nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *);
67 void nvkm_i2c_aux_release(struct nvkm_i2c_aux *);
68 int nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *, bool retry, u8 type,
69 		      u32 addr, u8 *data, u8 size);
70 int nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *, int link_nr, int link_bw,
71 			 bool enhanced_framing);
72 
73 struct nvkm_i2c {
74 	const struct nvkm_i2c_func *func;
75 	struct nvkm_subdev subdev;
76 
77 	struct list_head pad;
78 	struct list_head bus;
79 	struct list_head aux;
80 
81 	struct nvkm_event event;
82 };
83 
84 struct nvkm_i2c_bus *nvkm_i2c_bus_find(struct nvkm_i2c *, int);
85 struct nvkm_i2c_aux *nvkm_i2c_aux_find(struct nvkm_i2c *, int);
86 
87 int nv04_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
88 int nv4e_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
89 int nv50_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
90 int g94_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
91 int gf117_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
92 int gf119_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
93 int gk104_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
94 int gm204_i2c_new(struct nvkm_device *, int, struct nvkm_i2c **);
95 
96 static inline int
nvkm_rdi2cr(struct i2c_adapter * adap,u8 addr,u8 reg)97 nvkm_rdi2cr(struct i2c_adapter *adap, u8 addr, u8 reg)
98 {
99 	u8 val;
100 	struct i2c_msg msgs[] = {
101 		{ .addr = addr, .flags = 0, .len = 1, .buf = &reg },
102 		{ .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
103 	};
104 
105 	int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
106 	if (ret != 2)
107 		return -EIO;
108 
109 	return val;
110 }
111 
112 static inline int
nvkm_wri2cr(struct i2c_adapter * adap,u8 addr,u8 reg,u8 val)113 nvkm_wri2cr(struct i2c_adapter *adap, u8 addr, u8 reg, u8 val)
114 {
115 	u8 buf[2] = { reg, val };
116 	struct i2c_msg msgs[] = {
117 		{ .addr = addr, .flags = 0, .len = 2, .buf = buf },
118 	};
119 
120 	int ret = i2c_transfer(adap, msgs, ARRAY_SIZE(msgs));
121 	if (ret != 1)
122 		return -EIO;
123 
124 	return 0;
125 }
126 
127 static inline bool
nvkm_probe_i2c(struct i2c_adapter * adap,u8 addr)128 nvkm_probe_i2c(struct i2c_adapter *adap, u8 addr)
129 {
130 	return nvkm_rdi2cr(adap, addr, 0) >= 0;
131 }
132 
133 static inline int
nvkm_rdaux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)134 nvkm_rdaux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
135 {
136 	int ret = nvkm_i2c_aux_acquire(aux);
137 	if (ret == 0) {
138 		ret = nvkm_i2c_aux_xfer(aux, true, 9, addr, data, size);
139 		nvkm_i2c_aux_release(aux);
140 	}
141 	return ret;
142 }
143 
144 static inline int
nvkm_wraux(struct nvkm_i2c_aux * aux,u32 addr,u8 * data,u8 size)145 nvkm_wraux(struct nvkm_i2c_aux *aux, u32 addr, u8 *data, u8 size)
146 {
147 	int ret = nvkm_i2c_aux_acquire(aux);
148 	if (ret == 0) {
149 		ret = nvkm_i2c_aux_xfer(aux, true, 8, addr, data, size);
150 		nvkm_i2c_aux_release(aux);
151 	}
152 	return ret;
153 }
154 #endif
155