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Code Issues Releases Activity

Clean up BPMPFW I2C prototypes.

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Prototypes for internal functions shouldn't be in shared headers.
This commit is contained in:
Michael Scire 2018-02-23 12:07:02 -08:00
parent 0a0a1b088d
commit dbf2eb7ed1
2 changed files with 10 additions and 11 deletions
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10
exosphere/bpmpfw/src/i2c.c
View file

@ -1,6 +1,12 @@
#include "i2c.h" #include "i2c.h"
#include "timer.h" #include "timer.h"
/* Prototypes for internal commands. */
void i2c_load_config(void);
int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes);
int i2c_send_byte_command(unsigned int device, unsigned char reg, unsigned char b);
/* Load hardware config for I2C4. */
void i2c_load_config(void) { void i2c_load_config(void) {
/* Set MSTR_CONFIG_LOAD, TIMEOUT_CONFIG_LOAD, undocumented bit. */ /* Set MSTR_CONFIG_LOAD, TIMEOUT_CONFIG_LOAD, undocumented bit. */
I2C_I2C_CONFIG_LOAD_0 = 0x25; I2C_I2C_CONFIG_LOAD_0 = 0x25;
@ -14,6 +20,7 @@ void i2c_load_config(void) {
} }
} }
/* Initialize I2C4. */
void i2c_init(void) { void i2c_init(void) {
/* Setup divisor, and clear the bus. */ /* Setup divisor, and clear the bus. */
I2C_I2C_CLK_DIVISOR_REGISTER_0 = 0x50001; I2C_I2C_CLK_DIVISOR_REGISTER_0 = 0x50001;
@ -38,6 +45,7 @@ void i2c_init(void) {
I2C_INTERRUPT_STATUS_REGISTER_0 = int_status; 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) { int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes) {
if (num_bytes > 4) { if (num_bytes > 4) {
return 0; return 0;
@ -66,12 +74,14 @@ int i2c_write(unsigned int device, uint32_t val, unsigned int num_bytes) {
return (I2C_I2C_STATUS_0 & 7) == 0; 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) { int i2c_send_byte_command(unsigned int device, unsigned char reg, unsigned char b) {
uint32_t val = (reg) | (b << 8); uint32_t val = (reg) | (b << 8);
/* Write 1 byte (reg) + 1 byte (value) */ /* Write 1 byte (reg) + 1 byte (value) */
return i2c_write(device, val, 2); return i2c_write(device, val, 2);
} }
/* Actually reset device 27. This might turn off the screen? */
int i2c_send_reset_cmd(void) { int i2c_send_reset_cmd(void) {
/* Write 00 to Device 27 Reg 00. */ /* Write 00 to Device 27 Reg 00. */
return i2c_send_byte_command(27, 0, 0); return i2c_send_byte_command(27, 0, 0);

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

@ -27,19 +27,8 @@
#define I2C_I2C_CONFIG_LOAD_0 MAKE_I2C_REG(0x08C) #define I2C_I2C_CONFIG_LOAD_0 MAKE_I2C_REG(0x08C)
/* Initialize I2C4. */
void i2c_init(void); 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); 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 #endif