1#ifndef _BBC_I2C_H
2#define _BBC_I2C_H
3
4#include <linux/of.h>
5#include <linux/of_device.h>
6#include <linux/list.h>
7
8struct bbc_i2c_client {
9 struct bbc_i2c_bus *bp;
10 struct platform_device *op;
11 int bus;
12 int address;
13};
14
15enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };
16
17struct bbc_cpu_temperature {
18 struct list_head bp_list;
19 struct list_head glob_list;
20
21 struct bbc_i2c_client *client;
22 int index;
23
24
25 s8 curr_cpu_temp;
26 s8 curr_amb_temp;
27 s8 prev_cpu_temp;
28 s8 prev_amb_temp;
29 s8 avg_cpu_temp;
30 s8 avg_amb_temp;
31
32 int sample_tick;
33
34 enum fan_action fan_todo[2];
35#define FAN_AMBIENT 0
36#define FAN_CPU 1
37};
38
39struct bbc_fan_control {
40 struct list_head bp_list;
41 struct list_head glob_list;
42
43 struct bbc_i2c_client *client;
44 int index;
45
46 int psupply_fan_on;
47 int cpu_fan_speed;
48 int system_fan_speed;
49};
50
51#define NUM_CHILDREN 8
52
53struct bbc_i2c_bus {
54 struct bbc_i2c_bus *next;
55 int index;
56 spinlock_t lock;
57 void __iomem *i2c_bussel_reg;
58 void __iomem *i2c_control_regs;
59 unsigned char own, clock;
60
61 wait_queue_head_t wq;
62 volatile int waiting;
63
64 struct list_head temps;
65 struct list_head fans;
66
67 struct platform_device *op;
68 struct {
69 struct platform_device *device;
70 int client_claimed;
71 } devs[NUM_CHILDREN];
72};
73
74
75extern struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int);
76extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *);
77extern void bbc_i2c_detach(struct bbc_i2c_client *);
78
79
80extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off);
81extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);
82extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off);
83extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off);
84
85#endif
86
