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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Intel Corporation <www.intel.com>
*/
#include <common.h>
#include <dm.h>
#include <log.h>
#include <ns16550.h>
#include <serial.h>
#include <asm/arch/slimbootloader.h>
/**
* The serial port info hob is generated by Slim Bootloader, so eligible for
* Slim Bootloader based boards only.
*/
static int slimbootloader_serial_of_to_plat(struct udevice *dev)
{
const efi_guid_t guid = SBL_SERIAL_PORT_INFO_GUID;
struct sbl_serial_port_info *data;
struct ns16550_plat *plat = dev->plat;
if (!gd->arch.hob_list)
panic("hob list not found!");
data = hob_get_guid_hob_data(gd->arch.hob_list, NULL, &guid);
if (!data) {
debug("failed to get serial port information\n");
return -ENOENT;
}
debug("type:%d base=0x%08x baudrate=%d stride=%d clk=%d\n",
data->type,
data->base,
data->baud,
data->stride,
data->clk);
plat->base = data->base;
/* ns16550 uses reg_shift, then covert stride to shift */
plat->reg_shift = data->stride >> 1;
plat->reg_width = data->stride;
plat->clock = data->clk;
plat->fcr = UART_FCR_DEFVAL;
plat->flags = 0;
if (data->type == 1)
plat->flags |= NS16550_FLAG_IO;
return 0;
}
static const struct udevice_id slimbootloader_serial_ids[] = {
{ .compatible = "intel,slimbootloader-uart" },
{}
};
U_BOOT_DRIVER(serial_slimbootloader) = {
.name = "serial_slimbootloader",
.id = UCLASS_SERIAL,
.of_match = slimbootloader_serial_ids,
.of_to_plat = slimbootloader_serial_of_to_plat,
.plat_auto = sizeof(struct ns16550_plat),
.priv_auto = sizeof(struct ns16550),
.probe = ns16550_serial_probe,
.ops = &ns16550_serial_ops,
};
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