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Merge pull request #43 from lioncash/prototype

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i2c: Fix -Wmissing-prototypes warnings
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TuxSH 2018-02-23 19:18:46 +01:00 committed by GitHub
commit 0a0a1b088d
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2 changed files with 11 additions and 5 deletions
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5
exosphere/bpmpfw/src/i2c.c
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@ -1,7 +1,6 @@
#include "i2c.h"
#include "timer.h"
/* Load hardware config for I2C4. */
void i2c_load_config(void) {
/* Set MSTR_CONFIG_LOAD, TIMEOUT_CONFIG_LOAD, undocumented bit. */
I2C_I2C_CONFIG_LOAD_0 = 0x25;
@ -15,7 +14,6 @@ void i2c_load_config(void) {
}
}
/* Initialize I2C4. */
void i2c_init(void) {
/* Setup divisor, and clear the bus. */
I2C_I2C_CLK_DIVISOR_REGISTER_0 = 0x50001;
@ -40,7 +38,6 @@ void i2c_init(void) {
I2C_INTERRUPT_STATUS_REGISTER_0 = int_status;
}
/* Writes a value to an i2c device. */
int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes) {
if (num_bytes > 4) {
return 0;
@ -69,14 +66,12 @@ int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes) {
return (I2C_I2C_STATUS_0 & 7) == 0;
}
/* Writes a byte val to reg for given device. */
int i2c_send_byte_command(unsigned int device, unsigned char reg, unsigned char b) {
uint32_t val = (reg) | (b << 8);
/* Write 1 byte (reg) + 1 byte (value) */
return i2c_write(device, val, 2);
}
/* Actually reset device 27. This might turn off the screen? */
int i2c_send_reset_cmd(void) {
/* Write 00 to Device 27 Reg 00. */
return i2c_send_byte_command(27, 0, 0);

11
exosphere/bpmpfw/src/i2c.h
View file

@ -27,8 +27,19 @@
#define I2C_I2C_CONFIG_LOAD_0 MAKE_I2C_REG(0x08C)
/* Initialize I2C4. */
void i2c_init(void);
/* Load hardware config for I2C4. */
void i2c_load_config(void);
/* Actually reset device 27. This might turn off the screen? */
int i2c_send_reset_cmd(void);
/* Writes a value to an i2c device. */
int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes);
/* Writes a byte val to reg for given device. */
int i2c_send_byte_command(unsigned int device, unsigned char reg, unsigned char b);
#endif