blob: b87238b649487b075553408b1269ca1c02b9bab6 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 secunet Security Networks AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <device/device.h>
#include "chip.h"
#include "kempld.h"
#include "kempld_internal.h"
static void kempld_uart_read_resources(struct device *dev)
{
static const unsigned int io_addr[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
const struct ec_kontron_kempld_config *const config = dev->chip_info;
struct resource *const res_io = new_resource(dev, 0);
struct resource *const res_irq = new_resource(dev, 1);
const unsigned int uart = dev->path.generic.subid;
if (!config || !res_io || !res_irq || uart >= KEMPLD_NUM_UARTS)
return;
const enum kempld_uart_io io = config->uart[uart].io;
if (io >= ARRAY_SIZE(io_addr)) {
printk(BIOS_ERR, "KEMPLD: Bad io value '%d' for UART#%u\n.",
io, uart);
dev->enabled = false;
return;
}
const int irq = config->uart[uart].irq;
if (irq >= 16) {
printk(BIOS_ERR, "KEMPLD: Bad irq value '%d' for UART#%u\n.",
irq, uart);
dev->enabled = false;
return;
}
res_io->base = io_addr[io];
res_io->size = 8;
res_io->flags = IORESOURCE_IO | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
res_irq->base = irq;
res_irq->size = 1;
res_irq->flags = IORESOURCE_IO | IORESOURCE_FIXED |
IORESOURCE_STORED | IORESOURCE_ASSIGNED;
if (kempld_get_mutex(100) < 0)
return;
const uint8_t reg = uart ? KEMPLD_UART_1 : KEMPLD_UART_0;
const uint8_t val = kempld_read8(reg);
kempld_write8(reg, (val & ~(KEMPLD_UART_IO_MASK | KEMPLD_UART_IRQ_MASK))
| io << KEMPLD_UART_IO_SHIFT
| irq << KEMPLD_UART_IRQ_SHIFT);
kempld_release_mutex();
}
static void kempld_uart_enable_resources(struct device *dev)
{
if (kempld_get_mutex(100) < 0)
return;
const unsigned int uart = dev->path.generic.subid;
const uint8_t reg = uart ? KEMPLD_UART_1 : KEMPLD_UART_0;
kempld_write8(reg, kempld_read8(reg) | KEMPLD_UART_ENABLE);
kempld_release_mutex();
}
static struct device_operations kempld_uart_ops = {
.read_resources = kempld_uart_read_resources,
.enable_resources = kempld_uart_enable_resources,
};
static void kempld_enable_dev(struct device *const dev)
{
if (dev->path.type == DEVICE_PATH_GENERIC) {
switch (dev->path.generic.id) {
case 0:
if (dev->path.generic.subid < KEMPLD_NUM_UARTS) {
dev->ops = &kempld_uart_ops;
break;
}
/* Fall through. */
case 1:
if (dev->path.generic.subid == 0) {
kempld_i2c_device_init(dev);
break;
}
/* Fall through. */
default:
printk(BIOS_WARNING,
"KEMPLD: Spurious device %s.\n",
dev_path(dev));
break;
}
}
}
struct chip_operations ec_kontron_kempld_ops = {
CHIP_NAME("Kontron KEMPLD")
.enable_dev = kempld_enable_dev,
};