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#define NV_I2C_PORT(n)    (0x00 + (n))
10#define NV_I2C_AUX(n)     (0x10 + (n))
11#define NV_I2C_EXT(n)     (0x20 + (n))
12#define NV_I2C_DEFAULT(n) (0x80 + (n))
13
14#define NV_I2C_TYPE_DCBI2C(n) (0x0000 | (n))
15#define NV_I2C_TYPE_EXTDDC(e) (0x0005 | (e) << 8)
16#define NV_I2C_TYPE_EXTAUX(e) (0x0006 | (e) << 8)
17
18struct nvkm_i2c_ntfy_req {
19#define NVKM_I2C_PLUG                                                      0x01
20#define NVKM_I2C_UNPLUG                                                    0x02
21#define NVKM_I2C_IRQ                                                       0x04
22#define NVKM_I2C_DONE                                                      0x08
23#define NVKM_I2C_ANY                                                       0x0f
24	u8 mask;
25	u8 port;
26};
27
28struct nvkm_i2c_ntfy_rep {
29	u8 mask;
30};
31
32struct nvkm_i2c_port {
33	struct nvkm_object base;
34	struct i2c_adapter adapter;
35	struct mutex mutex;
36
37	struct list_head head;
38	u8  index;
39	int aux;
40
41	const struct nvkm_i2c_func *func;
42};
43
44struct nvkm_i2c_func {
45	void (*drive_scl)(struct nvkm_i2c_port *, int);
46	void (*drive_sda)(struct nvkm_i2c_port *, int);
47	int  (*sense_scl)(struct nvkm_i2c_port *);
48	int  (*sense_sda)(struct nvkm_i2c_port *);
49
50	int  (*aux)(struct nvkm_i2c_port *, bool, u8, u32, u8 *, u8);
51	int  (*pattern)(struct nvkm_i2c_port *, int pattern);
52	int  (*lnk_ctl)(struct nvkm_i2c_port *, int nr, int bw, bool enh);
53	int  (*drv_ctl)(struct nvkm_i2c_port *, int lane, int sw, int pe);
54};
55
56struct nvkm_i2c_board_info {
57	struct i2c_board_info dev;
58	u8 udelay; /* set to 0 to use the standard delay */
59};
60
61struct nvkm_i2c {
62	struct nvkm_subdev base;
63	struct nvkm_event event;
64
65	struct nvkm_i2c_port *(*find)(struct nvkm_i2c *, u8 index);
66	struct nvkm_i2c_port *(*find_type)(struct nvkm_i2c *, u16 type);
67	int  (*acquire_pad)(struct nvkm_i2c_port *, unsigned long timeout);
68	void (*release_pad)(struct nvkm_i2c_port *);
69	int  (*acquire)(struct nvkm_i2c_port *, unsigned long timeout);
70	void (*release)(struct nvkm_i2c_port *);
71	int  (*identify)(struct nvkm_i2c *, int index,
72			 const char *what, struct nvkm_i2c_board_info *,
73			 bool (*match)(struct nvkm_i2c_port *,
74				       struct i2c_board_info *, void *),
75			 void *);
76
77	wait_queue_head_t wait;
78	struct list_head ports;
79};
80
81static inline struct nvkm_i2c *
82nvkm_i2c(void *obj)
83{
84	return (void *)nvkm_subdev(obj, NVDEV_SUBDEV_I2C);
85}
86
87extern struct nvkm_oclass *nv04_i2c_oclass;
88extern struct nvkm_oclass *nv4e_i2c_oclass;
89extern struct nvkm_oclass *nv50_i2c_oclass;
90extern struct nvkm_oclass *g94_i2c_oclass;
91extern struct nvkm_oclass *gf110_i2c_oclass;
92extern struct nvkm_oclass *gf117_i2c_oclass;
93extern struct nvkm_oclass *gk104_i2c_oclass;
94extern struct nvkm_oclass *gm204_i2c_oclass;
95
96static inline int
97nv_rdi2cr(struct nvkm_i2c_port *port, 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(&port->adapter, msgs, 2);
106	if (ret != 2)
107		return -EIO;
108
109	return val;
110}
111
112static inline int
113nv_wri2cr(struct nvkm_i2c_port *port, 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(&port->adapter, msgs, 1);
121	if (ret != 1)
122		return -EIO;
123
124	return 0;
125}
126
127static inline bool
128nv_probe_i2c(struct nvkm_i2c_port *port, u8 addr)
129{
130	return nv_rdi2cr(port, addr, 0) >= 0;
131}
132
133int nv_rdaux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size);
134int nv_wraux(struct nvkm_i2c_port *, u32 addr, u8 *data, u8 size);
135#endif
136