86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
#ifndef _BBC_I2C_H
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#define _BBC_I2C_H
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/list.h>
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struct bbc_i2c_client {
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struct bbc_i2c_bus *bp;
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struct of_device *op;
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int bus;
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int address;
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};
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enum fan_action { FAN_SLOWER, FAN_SAME, FAN_FASTER, FAN_FULLBLAST, FAN_STATE_MAX };
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struct bbc_cpu_temperature {
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struct list_head bp_list;
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struct list_head glob_list;
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struct bbc_i2c_client *client;
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int index;
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/* Current readings, and history. */
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s8 curr_cpu_temp;
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s8 curr_amb_temp;
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s8 prev_cpu_temp;
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s8 prev_amb_temp;
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s8 avg_cpu_temp;
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s8 avg_amb_temp;
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int sample_tick;
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enum fan_action fan_todo[2];
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#define FAN_AMBIENT 0
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#define FAN_CPU 1
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};
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struct bbc_fan_control {
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struct list_head bp_list;
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struct list_head glob_list;
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struct bbc_i2c_client *client;
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int index;
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int psupply_fan_on;
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int cpu_fan_speed;
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int system_fan_speed;
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};
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#define NUM_CHILDREN 8
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struct bbc_i2c_bus {
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struct bbc_i2c_bus *next;
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int index;
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spinlock_t lock;
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void __iomem *i2c_bussel_reg;
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void __iomem *i2c_control_regs;
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unsigned char own, clock;
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wait_queue_head_t wq;
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volatile int waiting;
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struct list_head temps;
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struct list_head fans;
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struct of_device *op;
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struct {
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struct of_device *device;
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int client_claimed;
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} devs[NUM_CHILDREN];
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};
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/* Probing and attachment. */
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extern struct of_device *bbc_i2c_getdev(struct bbc_i2c_bus *, int);
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extern struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct of_device *);
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extern void bbc_i2c_detach(struct bbc_i2c_client *);
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/* Register read/write. NOTE: Blocking! */
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extern int bbc_i2c_writeb(struct bbc_i2c_client *, unsigned char val, int off);
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extern int bbc_i2c_readb(struct bbc_i2c_client *, unsigned char *byte, int off);
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extern int bbc_i2c_write_buf(struct bbc_i2c_client *, char *buf, int len, int off);
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extern int bbc_i2c_read_buf(struct bbc_i2c_client *, char *buf, int len, int off);
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#endif /* _BBC_I2C_H */
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