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ec/purism: Remove copied code from system76

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This code is identical except for some renaming.

Change-Id: I93795a6087ce0daca27c0d5038a1febd6ca9c775
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
This commit is contained in:
Arthur Heymans
2021-07-22 13:54:38 +02:00
committed by Patrick Georgi
parent da68c9d378
commit 08e9a4f812
2 changed files with 2 additions and 63 deletions
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4
src/ec/purism/librem-ec/Makefile.inc
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@@ -1,6 +1,6 @@
ifeq ($(CONFIG_EC_LIBREM_EC),y)
all-y += librem_ec.c
smm-$(CONFIG_DEBUG_SMI) += librem_ec.c
all-y += ../../system76/ec/system76_ec.c
smm-$(CONFIG_DEBUG_SMI) += ../../system76/ec/system76_ec.c
endif

61
src/ec/purism/librem-ec/librem_ec.c
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@@ -1,61 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/io.h>
#include <console/system76_ec.h>
#include <timer.h>
// This is the command region for Librem EC firmware. It must be
// enabled for LPC in the mainboard.
#define LIBREM_EC_BASE 0x0E00
#define LIBREM_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)
{
return inb(LIBREM_EC_BASE + (uint16_t)addr);
}
static inline void system76_ec_write(uint8_t addr, uint8_t data)
{
outb(data, LIBREM_EC_BASE + (uint16_t)addr);
}
void system76_ec_init(void)
{
// Clear entire command region
for (int i = 0; i < LIBREM_EC_SIZE; i++)
system76_ec_write((uint8_t)i, 0);
}
void system76_ec_flush(void)
{
system76_ec_write(REG_CMD, CMD_PRINT);
// 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);
system76_ec_write(CMD_PRINT_REG_LEN, 0);
}
void system76_ec_print(uint8_t byte)
{
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 >= (LIBREM_EC_SIZE - CMD_PRINT_REG_DATA))
system76_ec_flush();
}