da3ef13d27
There was no code attached to this driver and hence one couldn't hook it up to any device. Even if mentioned in the `devicetree.cb` it was still dead code. Change-Id: I12415ea9e0120b1d00524f8f39f9b2d02f46ba05 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/57431 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
150 lines
2.5 KiB
C
150 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <console/console.h>
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#include <device/device.h>
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#include <arch/io.h>
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#include <delay.h>
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#include <stdint.h>
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#include "ec.h"
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static u16 ec_cmd_reg = EC_SC;
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static u16 ec_data_reg = EC_DATA;
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int send_ec_command(u8 command)
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{
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int timeout;
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timeout = 0x7ff;
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while ((inb(ec_cmd_reg) & EC_IBF) && --timeout) {
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udelay(10);
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if ((timeout & 0xff) == 0)
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printk(BIOS_SPEW, ".");
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}
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if (!timeout) {
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printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n",
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command);
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// return -1;
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}
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udelay(10);
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outb(command, ec_cmd_reg);
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return 0;
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}
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int send_ec_data(u8 data)
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{
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int timeout;
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timeout = 0x7ff;
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while ((inb(ec_cmd_reg) & EC_IBF) && --timeout) { // wait for IBF = 0
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udelay(10);
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if ((timeout & 0xff) == 0)
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printk(BIOS_SPEW, ".");
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}
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if (!timeout) {
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printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n",
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data);
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// return -1;
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}
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udelay(10);
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outb(data, ec_data_reg);
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return 0;
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}
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int send_ec_data_nowait(u8 data)
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{
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outb(data, ec_data_reg);
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return 0;
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}
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u8 recv_ec_data(void)
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{
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int timeout;
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u8 data;
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timeout = 0x7fff;
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while (--timeout) { // Wait for OBF = 1
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if (inb(ec_cmd_reg) & EC_OBF) {
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break;
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}
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udelay(10);
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if ((timeout & 0xff) == 0)
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printk(BIOS_SPEW, ".");
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}
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if (!timeout) {
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printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n");
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// return -1;
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}
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udelay(10);
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data = inb(ec_data_reg);
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printk(BIOS_SPEW, "%s: 0x%02x\n", __func__, data);
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return data;
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}
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void ec_clear_out_queue(void)
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{
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int timeout = 0x7fff;
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printk(BIOS_SPEW, "Clearing EC output queue...\n");
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while (--timeout && (inb(ec_cmd_reg) & EC_OBF)) {
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u8 data = inb(ec_data_reg);
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printk(BIOS_SPEW, "Discarding a garbage byte: 0x%02x\n", data);
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udelay(10);
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}
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if (!timeout)
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printk(BIOS_ERR, "Timeout while clearing EC output queue!\n");
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else
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printk(BIOS_SPEW, "EC output queue has been cleared.\n");
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}
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u8 ec_read(u8 addr)
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{
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send_ec_command(0x80);
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send_ec_data(addr);
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return recv_ec_data();
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}
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int ec_write(u8 addr, u8 data)
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{
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send_ec_command(0x81);
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send_ec_data(addr);
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return send_ec_data(data);
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}
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u8 ec_status(void)
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{
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return inb(ec_cmd_reg);
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}
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u8 ec_query(void)
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{
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send_ec_command(0x84);
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return recv_ec_data();
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}
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void ec_set_bit(u8 addr, u8 bit)
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{
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ec_write(addr, ec_read(addr) | (1 << bit));
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}
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void ec_clr_bit(u8 addr, u8 bit)
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{
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ec_write(addr, ec_read(addr) & ~(1 << bit));
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}
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void ec_set_ports(u16 cmd_reg, u16 data_reg)
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{
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if (!ENV_STAGE_HAS_DATA_SECTION)
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return;
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ec_cmd_reg = cmd_reg;
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ec_data_reg = data_reg;
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}
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