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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <bootblock_common.h>
#include <stdint.h>
#include <cf9_reset.h>
#include <device/pnp_ops.h>
#include <superio/winbond/common/winbond.h>
#include <superio/winbond/w83627dhg/w83627dhg.h>
#include <console/console.h>
#include <northbridge/intel/i945/i945.h>
#include <southbridge/intel/i82801gx/i82801gx.h>
#include <cpu/x86/msr.h>
#include <cpu/intel/speedstep.h>
#include <arch/cpu.h>
#define SERIAL_DEV PNP_DEV(0x2e, W83627DHG_SP1)
#define GPIO_DEV PNP_DEV(0x2e, W83627DHG_GPIO2345_V)
/*
* BSEL0 is connected with GPIO32
* BSEL1 is connected with GPIO33 with inversed logic
* BSEL2 is connected with GPIO55
*/
static int setup_sio_gpio(u8 bsel)
{
int need_reset = 0;
u8 reg, old_reg;
pnp_enter_ext_func_mode(GPIO_DEV);
pnp_set_logical_device(GPIO_DEV);
reg = 0x9a;
old_reg = pnp_read_config(GPIO_DEV, 0x2c);
pnp_write_config(GPIO_DEV, 0x2c, reg);
need_reset = (reg != old_reg);
pnp_write_config(GPIO_DEV, 0x30, 0x0e);
pnp_write_config(GPIO_DEV, 0xe0, 0xde);
pnp_write_config(GPIO_DEV, 0xf0, 0xf3);
pnp_write_config(GPIO_DEV, 0xf4, 0x80);
pnp_write_config(GPIO_DEV, 0xf5, 0x80);
/* Invert GPIO33 */
pnp_write_config(GPIO_DEV, 0xf2, 0x08);
reg = (bsel & 3) << 2;
old_reg = pnp_read_config(GPIO_DEV, 0xf1);
pnp_write_config(GPIO_DEV, 0xf1, reg);
need_reset += ((reg & 0xc) != (old_reg & 0xc));
reg = (bsel >> 2) << 5;
old_reg = pnp_read_config(GPIO_DEV, 0xe1);
pnp_write_config(GPIO_DEV, 0xe1, reg);
need_reset += ((reg & 0x20) != (old_reg & 0x20));
pnp_exit_ext_func_mode(GPIO_DEV);
return need_reset;
}
static u8 msr_get_fsb(void)
{
u8 fsbcfg;
msr_t msr;
const u32 eax = cpuid_eax(1);
/* Netburst */
if (((eax >> 8) & 0xf) == 0xf) {
msr = rdmsr(MSR_EBC_FREQUENCY_ID);
fsbcfg = (msr.lo >> 16) & 0x7;
} else { /* Intel Core 2 */
msr = rdmsr(MSR_FSB_FREQ);
fsbcfg = msr.lo & 0x7;
}
return fsbcfg;
}
void mainboard_late_rcba_config(void)
{
/* Enable only PCIe Root Port Clock Gate */
RCBA32(CG) = 0x00000001;
}
void mainboard_pre_raminit_config(int s3_resume)
{
u8 c_bsel = msr_get_fsb();
/*
* Result is that FSB is incorrect on s3 resume (fixed at 800MHz).
* Some CPU accept this others don't.
*/
if (!s3_resume && setup_sio_gpio(c_bsel)) {
printk(BIOS_DEBUG,
"Needs reset to configure CPU BSEL straps\n");
full_reset();
}
}
void bootblock_mainboard_early_init(void)
{
winbond_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
}
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