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/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pci.h>
#include <smsc_sio1007.h>
#include <asm/ibmpc.h>
#include <asm/lpc_common.h>
#include <asm/pci.h>
#include <asm/arch/pch.h>
#define SIO1007_RUNTIME_IOPORT 0x180
int board_early_init_f(void)
{
struct udevice *pch;
int ret;
ret = uclass_first_device(UCLASS_PCH, &pch);
if (ret)
return ret;
if (!pch)
return -ENODEV;
/* Initialize LPC interface to turn on superio chipset decode range */
dm_pci_write_config16(pch, LPC_IO_DEC, COMA_DEC_RANGE | COMB_DEC_RANGE);
dm_pci_write_config16(pch, LPC_EN, KBC_LPC_EN | COMA_LPC_EN);
dm_pci_write_config32(pch, LPC_GEN1_DEC, GEN_DEC_RANGE_256B |
(SIO1007_IOPORT3 & 0xff00) | GEN_DEC_RANGE_EN);
dm_pci_write_config32(pch, LPC_GEN2_DEC, GEN_DEC_RANGE_16B |
SIO1007_RUNTIME_IOPORT | GEN_DEC_RANGE_EN);
/* Enable legacy serial port at 0x3f8 */
sio1007_enable_serial(SIO1007_IOPORT3, 0, UART0_BASE, UART0_IRQ);
/* Enable SIO1007 runtime I/O port at 0x180 */
sio1007_enable_runtime(SIO1007_IOPORT3, SIO1007_RUNTIME_IOPORT);
/*
* On Cougar Canyon 2 board, the RS232 transiver connected to serial
* port 0 (0x3f8) is controlled by a GPIO pin (GPIO10) on the SIO1007.
* Set the pin value to 1 to enable the RS232 transiver.
*/
sio1007_gpio_config(SIO1007_IOPORT3, 0, GPIO_DIR_OUTPUT,
GPIO_POL_NO_INVERT, GPIO_TYPE_PUSH_PULL);
sio1007_gpio_set_value(SIO1007_RUNTIME_IOPORT, 0, 1);
return 0;
}
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