mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 05:04:26 +00:00
6a2350f8c9
With the new of-platdata, these need to be available to dt_platdata.c so must be in header files. Move them and add the dtd struct too. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
|
|
*
|
|
* Generic reset driver for x86 processor
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <efi_loader.h>
|
|
#include <pch.h>
|
|
#include <sysreset.h>
|
|
#include <acpi/acpi_s3.h>
|
|
#include <asm/io.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/sysreset.h>
|
|
|
|
/*
|
|
* Power down the machine by using the power management sleep control
|
|
* of the chipset. This will currently only work on Intel chipsets.
|
|
* However, adapting it to new chipsets is fairly simple. You will
|
|
* have to find the IO address of the power management register block
|
|
* in your southbridge, and look up the appropriate SLP_TYP_S5 value
|
|
* from your southbridge's data sheet.
|
|
*
|
|
* This function never returns.
|
|
*/
|
|
int pch_sysreset_power_off(struct udevice *dev)
|
|
{
|
|
struct x86_sysreset_plat *plat = dev_get_plat(dev);
|
|
struct pch_pmbase_info pm;
|
|
u32 reg32;
|
|
int ret;
|
|
|
|
if (!plat->pch)
|
|
return -ENOENT;
|
|
ret = pch_ioctl(plat->pch, PCH_REQ_PMBASE_INFO, &pm, sizeof(pm));
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Mask interrupts or system might stay in a coma, not executing code
|
|
* anymore, but not powered off either.
|
|
*/
|
|
asm("cli");
|
|
|
|
/*
|
|
* Avoid any GPI waking the system from S5* or the system might stay in
|
|
* a coma
|
|
*/
|
|
outl(0x00000000, pm.base + pm.gpio0_en_ofs);
|
|
|
|
/* Clear Power Button Status */
|
|
outw(PWRBTN_STS, pm.base + pm.pm1_sts_ofs);
|
|
|
|
/* PMBASE + 4, Bit 10-12, Sleeping Type, * set to 111 -> S5, soft_off */
|
|
reg32 = inl(pm.base + pm.pm1_cnt_ofs);
|
|
|
|
/* Set Sleeping Type to S5 (poweroff) */
|
|
reg32 &= ~(SLP_EN | SLP_TYP);
|
|
reg32 |= SLP_TYP_S5;
|
|
outl(reg32, pm.base + pm.pm1_cnt_ofs);
|
|
|
|
/* Now set the Sleep Enable bit */
|
|
reg32 |= SLP_EN;
|
|
outl(reg32, pm.base + pm.pm1_cnt_ofs);
|
|
|
|
for (;;)
|
|
asm("hlt");
|
|
}
|
|
|
|
static int x86_sysreset_request(struct udevice *dev, enum sysreset_t type)
|
|
{
|
|
int value;
|
|
int ret;
|
|
|
|
switch (type) {
|
|
case SYSRESET_WARM:
|
|
value = SYS_RST | RST_CPU;
|
|
break;
|
|
case SYSRESET_COLD:
|
|
value = SYS_RST | RST_CPU | FULL_RST;
|
|
break;
|
|
case SYSRESET_POWER_OFF:
|
|
ret = pch_sysreset_power_off(dev);
|
|
if (ret)
|
|
return ret;
|
|
return -EINPROGRESS;
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
|
|
outb(value, IO_PORT_RESET);
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static int x86_sysreset_get_last(struct udevice *dev)
|
|
{
|
|
return SYSRESET_POWER;
|
|
}
|
|
|
|
#ifdef CONFIG_EFI_LOADER
|
|
void __efi_runtime EFIAPI efi_reset_system(
|
|
enum efi_reset_type reset_type,
|
|
efi_status_t reset_status,
|
|
unsigned long data_size, void *reset_data)
|
|
{
|
|
int value;
|
|
|
|
/*
|
|
* inline this code since we are not caused in the context of a
|
|
* udevice and passing NULL to x86_sysreset_request() is too horrible.
|
|
*/
|
|
if (reset_type == EFI_RESET_COLD ||
|
|
reset_type == EFI_RESET_PLATFORM_SPECIFIC)
|
|
value = SYS_RST | RST_CPU | FULL_RST;
|
|
else /* assume EFI_RESET_WARM since we cannot return an error */
|
|
value = SYS_RST | RST_CPU;
|
|
outb(value, IO_PORT_RESET);
|
|
|
|
/* TODO EFI_RESET_SHUTDOWN */
|
|
|
|
while (1) { }
|
|
}
|
|
#endif
|
|
|
|
static int x86_sysreset_probe(struct udevice *dev)
|
|
{
|
|
struct x86_sysreset_plat *plat = dev_get_plat(dev);
|
|
|
|
/* Locate the PCH if there is one. It isn't essential */
|
|
uclass_first_device(UCLASS_PCH, &plat->pch);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id x86_sysreset_ids[] = {
|
|
{ .compatible = "x86,reset" },
|
|
{ }
|
|
};
|
|
|
|
static struct sysreset_ops x86_sysreset_ops = {
|
|
.request = x86_sysreset_request,
|
|
.get_last = x86_sysreset_get_last,
|
|
};
|
|
|
|
U_BOOT_DRIVER(x86_reset) = {
|
|
.name = "x86_reset",
|
|
.id = UCLASS_SYSRESET,
|
|
.of_match = x86_sysreset_ids,
|
|
.ops = &x86_sysreset_ops,
|
|
.probe = x86_sysreset_probe,
|
|
.plat_auto = sizeof(struct x86_sysreset_plat),
|
|
};
|