45f512c8e0
Change-Id: Ifb5f848912fca4e86b6eab16a74733571a4ba26d Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/61483 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com>
147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <arch/io.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/pnp.h>
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#include <delay.h>
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#include <elog.h>
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#include <pc80/keyboard.h>
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#include "ec.h"
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#include "chip.h"
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/* kbc helper functions from drivers/pc80/keyboard.c */
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static int ec_input_buffer_empty(u8 status_port)
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{
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u32 timeout;
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for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(status_port) & KBD_IBF);
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timeout--) {
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mdelay(1);
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}
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if (!timeout) {
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printk(BIOS_WARNING, "Unexpected EC/KBD input buffer full\n");
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}
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return !!timeout;
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}
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static int ec_output_buffer_full(u8 status_port)
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{
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u32 timeout;
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for (timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(status_port)
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& KBD_OBF) == 0); timeout--) {
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mdelay(1);
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}
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if (!timeout) {
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printk(BIOS_INFO, "EC/KBD output buffer result timeout\n");
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}
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return !!timeout;
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}
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/* The ENE 60/64 EC registers are the same command/status IB/OB KBC pair.
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* Check status from 64 port before each command.
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*
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* Ex. Get panel ID command C43/D77
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* Check IBF empty. Then Write 0x43(CMD) to 0x64 Port
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* Check IBF empty. Then Write 0x77(DATA) to 0x60 Port
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* Check OBF set. Then Get Data(0x03:panel ID) from 0x60
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* Different commands return may or may not respond and may have multiple
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* bytes. Keep it simple for now
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*/
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u8 ec_kbc_read_ob(void)
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{
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if (!ec_output_buffer_full(KBD_STATUS)) return 0;
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return inb(KBD_DATA);
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}
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void ec_kbc_write_cmd(u8 cmd)
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{
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if (!ec_input_buffer_empty(KBD_STATUS)) return;
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outb(cmd, KBD_COMMAND);
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}
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void ec_kbc_write_ib(u8 data)
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{
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if (!ec_input_buffer_empty(KBD_STATUS)) return;
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outb(data, KBD_DATA);
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}
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/* EC Host Control Protocol routines */
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u8 ec_read_ob(void)
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{
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if (!ec_output_buffer_full(EC_SC)) return 0;
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return inb(EC_DATA);
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}
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void ec_write_cmd(u8 cmd)
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{
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if (!ec_input_buffer_empty(EC_SC)) return;
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outb(cmd, EC_COMMAND);
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}
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void ec_write_ib(u8 data)
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{
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if (!ec_input_buffer_empty(EC_SC)) return;
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outb(data, EC_DATA);
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}
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/*
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* These functions are for accessing the ENE932 device RAM space
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*/
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u8 ec_mem_read(u8 addr)
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{
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ec_write_cmd(EC_CMD_READ_RAM);
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ec_write_ib(addr);
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return ec_read_ob();
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}
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void ec_mem_write(u8 addr, u8 data)
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{
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ec_write_cmd(EC_CMD_WRITE_RAM);
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ec_write_ib(addr);
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ec_write_ib(data);
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}
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static void ene_kb3940q_log_events(void)
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{
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if (CONFIG(ELOG)) {
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u8 reason = ec_mem_read(EC_SHUTDOWN_REASON);
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if (reason)
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elog_add_event_byte(ELOG_TYPE_EC_SHUTDOWN, reason);
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}
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}
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static void ene_kb3940q_init(struct device *dev)
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{
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if (!dev->enabled)
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return;
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printk(BIOS_DEBUG, "Quanta EnE KB3940Q: Initializing keyboard.\n");
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pc_keyboard_init(NO_AUX_DEVICE);
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ene_kb3940q_log_events();
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}
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static struct device_operations ops = {
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.init = ene_kb3940q_init,
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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};
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static struct pnp_info pnp_dev_info[] = {
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{ NULL, 0, 0, 0, }
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};
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static void enable_dev(struct device *dev)
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{
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pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
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}
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struct chip_operations ec_quanta_ene_kb3940q_ops = {
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CHIP_NAME("QUANTA EnE KB3940Q EC")
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.enable_dev = enable_dev
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};
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