1#ifndef __NOUVEAU_I2C_H__
2#define __NOUVEAU_I2C_H__
3
4#include <core/subdev.h>
5#include <core/device.h>
6
7#include <subdev/bios.h>
8#include <subdev/bios/i2c.h>
9
10#define NV_I2C_PORT(n) (0x00 + (n))
11#define NV_I2C_DEFAULT(n) (0x80 + (n))
12
13#define NV_I2C_TYPE_DCBI2C(n) (0x0000 | (n))
14#define NV_I2C_TYPE_EXTDDC(e) (0x0005 | (e) << 8)
15#define NV_I2C_TYPE_EXTAUX(e) (0x0006 | (e) << 8)
16
17struct nvkm_i2c_ntfy_req {
18#define NVKM_I2C_PLUG 0x01
19#define NVKM_I2C_UNPLUG 0x02
20#define NVKM_I2C_IRQ 0x04
21#define NVKM_I2C_DONE 0x08
22#define NVKM_I2C_ANY 0x0f
23 u8 mask;
24 u8 port;
25};
26
27struct nvkm_i2c_ntfy_rep {
28 u8 mask;
29};
30
31struct nouveau_i2c_port {
32 struct nouveau_object base;
33 struct i2c_adapter adapter;
34 struct mutex mutex;
35
36 struct list_head head;
37 u8 index;
38 int aux;
39
40 const struct nouveau_i2c_func *func;
41};
42
43struct nouveau_i2c_func {
44 void (*drive_scl)(struct nouveau_i2c_port *, int);
45 void (*drive_sda)(struct nouveau_i2c_port *, int);
46 int (*sense_scl)(struct nouveau_i2c_port *);
47 int (*sense_sda)(struct nouveau_i2c_port *);
48
49 int (*aux)(struct nouveau_i2c_port *, bool, u8, u32, u8 *, u8);
50 int (*pattern)(struct nouveau_i2c_port *, int pattern);
51 int (*lnk_ctl)(struct nouveau_i2c_port *, int nr, int bw, bool enh);
52 int (*drv_ctl)(struct nouveau_i2c_port *, int lane, int sw, int pe);
53};
54
55struct nouveau_i2c_board_info {
56 struct i2c_board_info dev;
57 u8 udelay;
58};
59
60struct nouveau_i2c {
61 struct nouveau_subdev base;
62 struct nvkm_event event;
63
64 struct nouveau_i2c_port *(*find)(struct nouveau_i2c *, u8 index);
65 struct nouveau_i2c_port *(*find_type)(struct nouveau_i2c *, u16 type);
66 int (*acquire_pad)(struct nouveau_i2c_port *, unsigned long timeout);
67 void (*release_pad)(struct nouveau_i2c_port *);
68 int (*acquire)(struct nouveau_i2c_port *, unsigned long timeout);
69 void (*release)(struct nouveau_i2c_port *);
70 int (*identify)(struct nouveau_i2c *, int index,
71 const char *what, struct nouveau_i2c_board_info *,
72 bool (*match)(struct nouveau_i2c_port *,
73 struct i2c_board_info *, void *), void *);
74
75 wait_queue_head_t wait;
76 struct list_head ports;
77};
78
79static inline struct nouveau_i2c *
80nouveau_i2c(void *obj)
81{
82 return (void *)nv_device(obj)->subdev[NVDEV_SUBDEV_I2C];
83}
84
85extern struct nouveau_oclass *nv04_i2c_oclass;
86extern struct nouveau_oclass *nv4e_i2c_oclass;
87extern struct nouveau_oclass *nv50_i2c_oclass;
88extern struct nouveau_oclass *nv94_i2c_oclass;
89extern struct nouveau_oclass *nvd0_i2c_oclass;
90extern struct nouveau_oclass *gf117_i2c_oclass;
91extern struct nouveau_oclass *nve0_i2c_oclass;
92
93static inline int
94nv_rdi2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg)
95{
96 u8 val;
97 struct i2c_msg msgs[] = {
98 { .addr = addr, .flags = 0, .len = 1, .buf = ® },
99 { .addr = addr, .flags = I2C_M_RD, .len = 1, .buf = &val },
100 };
101
102 int ret = i2c_transfer(&port->adapter, msgs, 2);
103 if (ret != 2)
104 return -EIO;
105
106 return val;
107}
108
109static inline int
110nv_wri2cr(struct nouveau_i2c_port *port, u8 addr, u8 reg, u8 val)
111{
112 u8 buf[2] = { reg, val };
113 struct i2c_msg msgs[] = {
114 { .addr = addr, .flags = 0, .len = 2, .buf = buf },
115 };
116
117 int ret = i2c_transfer(&port->adapter, msgs, 1);
118 if (ret != 1)
119 return -EIO;
120
121 return 0;
122}
123
124static inline bool
125nv_probe_i2c(struct nouveau_i2c_port *port, u8 addr)
126{
127 return nv_rdi2cr(port, addr, 0) >= 0;
128}
129
130int nv_rdaux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size);
131int nv_wraux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size);
132
133#endif
134
