ec/system76/ec: Sync changes from upstream
Change-Id: I277324a731548fd9d30e790922834172ac86c2a3
This commit is contained in:
committed by
Jeremy Soller
parent
3dd5bc6550
commit
1ff8f316f4
@@ -4,7 +4,22 @@
|
||||
#include <console/system76_ec.h>
|
||||
#include <timer.h>
|
||||
|
||||
// This is the command region for System76 EC firmware. It must be
|
||||
// enabled for LPC in the mainboard.
|
||||
#define SYSTEM76_EC_BASE 0x0E00
|
||||
#define SYSTEM76_EC_SIZE 256
|
||||
|
||||
#define REG_CMD 0
|
||||
#define REG_RESULT 1
|
||||
|
||||
// When command register is 0, command is complete
|
||||
#define CMD_FINISHED 0
|
||||
|
||||
// Print command. Registers are unique for each command
|
||||
#define CMD_PRINT 4
|
||||
#define CMD_PRINT_REG_FLAGS 2
|
||||
#define CMD_PRINT_REG_LEN 3
|
||||
#define CMD_PRINT_REG_DATA 4
|
||||
|
||||
static inline uint8_t system76_ec_read(uint8_t addr)
|
||||
{
|
||||
@@ -19,32 +34,28 @@ static inline void system76_ec_write(uint8_t addr, uint8_t data)
|
||||
void system76_ec_init(void)
|
||||
{
|
||||
// Clear entire command region
|
||||
for (int i = 0; i < 256; i++)
|
||||
for (int i = 0; i < SYSTEM76_EC_SIZE; i++)
|
||||
system76_ec_write((uint8_t)i, 0);
|
||||
}
|
||||
|
||||
void system76_ec_flush(void)
|
||||
{
|
||||
// Send command
|
||||
system76_ec_write(0, 4);
|
||||
system76_ec_write(REG_CMD, CMD_PRINT);
|
||||
|
||||
// Wait for command completion, for up to 10 milliseconds
|
||||
wait_us(10000, system76_ec_read(0) == 0);
|
||||
// Wait for command completion, for up to 10 milliseconds, with a
|
||||
// test period of 1 microsecond
|
||||
wait_us(10000, system76_ec_read(REG_CMD) == CMD_FINISHED);
|
||||
|
||||
// Clear length
|
||||
system76_ec_write(3, 0);
|
||||
system76_ec_write(CMD_PRINT_REG_LEN, 0);
|
||||
}
|
||||
|
||||
void system76_ec_print(uint8_t byte)
|
||||
{
|
||||
// Read length
|
||||
uint8_t len = system76_ec_read(3);
|
||||
// Write data at offset
|
||||
system76_ec_write(len + 4, byte);
|
||||
// Update length
|
||||
system76_ec_write(3, len + 1);
|
||||
uint8_t len = system76_ec_read(CMD_PRINT_REG_LEN);
|
||||
system76_ec_write(CMD_PRINT_REG_DATA + len, byte);
|
||||
system76_ec_write(CMD_PRINT_REG_LEN, len + 1);
|
||||
|
||||
// If we hit the end of the buffer, or were given a newline, flush
|
||||
if (byte == '\n' || len >= 128)
|
||||
if (byte == '\n' || len >= (SYSTEM76_EC_SIZE - CMD_PRINT_REG_DATA))
|
||||
system76_ec_flush();
|
||||
}
|
||||
|
Reference in New Issue
Block a user