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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
#define LOG_CATEGORY UCLASS_ACPI_PMC
#include <common.h>
#include <dm.h>
#include <log.h>
#include <spl.h>
#include <acpi/acpi_s3.h>
#ifdef CONFIG_X86
#include <asm/intel_pinctrl.h>
#endif
#include <asm/io.h>
#include <power/acpi_pmc.h>
struct tco_regs {
u32 tco_rld;
u32 tco_sts;
u32 tco1_cnt;
u32 tco_tmr;
};
enum {
TCO_STS_TIMEOUT = 1 << 3,
TCO_STS_SECOND_TO_STS = 1 << 17,
TCO1_CNT_HLT = 1 << 11,
};
#ifdef CONFIG_X86
static int gpe0_shift(struct acpi_pmc_upriv *upriv, int regnum)
{
return upriv->gpe0_dwx_shift_base + regnum * 4;
}
int pmc_gpe_init(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
struct udevice *itss;
u32 *dw;
u32 gpio_cfg_mask;
u32 gpio_cfg;
int ret, i;
u32 mask;
if (device_get_uclass_id(dev) != UCLASS_ACPI_PMC)
return log_msg_ret("uclass", -EPROTONOSUPPORT);
dw = upriv->gpe0_dw;
mask = upriv->gpe0_dwx_mask;
gpio_cfg_mask = 0;
for (i = 0; i < upriv->gpe0_count; i++) {
gpio_cfg_mask |= mask << gpe0_shift(upriv, i);
if (dw[i] & ~mask)
return log_msg_ret("Base GPE0 value", -EINVAL);
}
/*
* Route the GPIOs to the GPE0 block. Determine that all values
* are different and if they aren't, use the reset values.
*/
if (dw[0] == dw[1] || dw[1] == dw[2]) {
if (spl_phase() > PHASE_TPL)
log_info("PMC: Using default GPE route");
gpio_cfg = readl(upriv->gpe_cfg);
for (i = 0; i < upriv->gpe0_count; i++)
dw[i] = gpio_cfg >> gpe0_shift(upriv, i);
} else {
gpio_cfg = 0;
for (i = 0; i < upriv->gpe0_count; i++)
gpio_cfg |= dw[i] << gpe0_shift(upriv, i);
clrsetbits_le32(upriv->gpe_cfg, gpio_cfg_mask, gpio_cfg);
}
/* Set the routes in the GPIO communities as well */
ret = uclass_first_device_err(UCLASS_IRQ, &itss);
if (ret)
return log_msg_ret("Cannot find itss", ret);
pinctrl_route_gpe(itss, dw[0], dw[1], dw[2]);
return 0;
}
#endif /* CONFIG_X86 */
static void pmc_fill_pm_reg_info(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
int i;
upriv->pm1_sts = inw(upriv->acpi_base + PM1_STS);
upriv->pm1_en = inw(upriv->acpi_base + PM1_EN);
upriv->pm1_cnt = inw(upriv->acpi_base + PM1_CNT);
log_debug("pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n",
upriv->pm1_sts, upriv->pm1_en, upriv->pm1_cnt);
for (i = 0; i < GPE0_REG_MAX; i++) {
upriv->gpe0_sts[i] = inl(upriv->acpi_base + GPE0_STS + i * 4);
upriv->gpe0_en[i] = inl(upriv->acpi_base + GPE0_EN + i * 4);
log_debug("gpe0_sts[%d]: %08x gpe0_en[%d]: %08x\n", i,
upriv->gpe0_sts[i], i, upriv->gpe0_en[i]);
}
}
int pmc_disable_tco_base(ulong tco_base)
{
struct tco_regs *regs = (struct tco_regs *)tco_base;
debug("tco_base %lx = %x\n", (ulong)®s->tco1_cnt, TCO1_CNT_HLT);
setio_32(®s->tco1_cnt, TCO1_CNT_HLT);
return 0;
}
int pmc_init(struct udevice *dev)
{
const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
int ret;
pmc_fill_pm_reg_info(dev);
if (!ops->init)
return -ENOSYS;
ret = ops->init(dev);
if (ret)
return log_msg_ret("Failed to init pmc", ret);
#ifdef DEBUG
pmc_dump_info(dev);
#endif
return 0;
}
int pmc_prev_sleep_state(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
int prev_sleep_state = ACPI_S0; /* Default to S0 */
if (upriv->pm1_sts & WAK_STS) {
switch (acpi_sleep_from_pm1(upriv->pm1_cnt)) {
case ACPI_S3:
if (IS_ENABLED(HAVE_ACPI_RESUME))
prev_sleep_state = ACPI_S3;
break;
case ACPI_S5:
prev_sleep_state = ACPI_S5;
break;
default:
break;
}
/* Clear SLP_TYP */
outl(upriv->pm1_cnt & ~SLP_TYP, upriv->acpi_base + PM1_CNT);
}
if (!ops->prev_sleep_state)
return prev_sleep_state;
return ops->prev_sleep_state(dev, prev_sleep_state);
}
int pmc_disable_tco(struct udevice *dev)
{
const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
pmc_fill_pm_reg_info(dev);
if (!ops->disable_tco)
return -ENOSYS;
return ops->disable_tco(dev);
}
int pmc_global_reset_set_enable(struct udevice *dev, bool enable)
{
const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
if (!ops->global_reset_set_enable)
return -ENOSYS;
return ops->global_reset_set_enable(dev, enable);
}
void pmc_dump_info(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
int i;
printf("Device: %s\n", dev->name);
printf("ACPI base %x, pmc_bar0 %p, pmc_bar2 %p, gpe_cfg %p\n",
upriv->acpi_base, upriv->pmc_bar0, upriv->pmc_bar2,
upriv->gpe_cfg);
printf("pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n",
upriv->pm1_sts, upriv->pm1_en, upriv->pm1_cnt);
for (i = 0; i < GPE0_REG_MAX; i++) {
printf("gpe0_sts[%d]: %08x gpe0_en[%d]: %08x\n", i,
upriv->gpe0_sts[i], i, upriv->gpe0_en[i]);
}
printf("prsts: %08x\n", upriv->prsts);
printf("tco_sts: %04x %04x\n", upriv->tco1_sts, upriv->tco2_sts);
printf("gen_pmcon1: %08x gen_pmcon2: %08x gen_pmcon3: %08x\n",
upriv->gen_pmcon1, upriv->gen_pmcon2, upriv->gen_pmcon3);
}
int pmc_ofdata_to_uc_plat(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
int ret;
ret = dev_read_u32(dev, "gpe0-dwx-mask", &upriv->gpe0_dwx_mask);
if (ret)
return log_msg_ret("no gpe0-dwx-mask", ret);
ret = dev_read_u32(dev, "gpe0-dwx-shift-base",
&upriv->gpe0_dwx_shift_base);
if (ret)
return log_msg_ret("no gpe0-dwx-shift-base", ret);
ret = dev_read_u32(dev, "gpe0-sts", &upriv->gpe0_sts_reg);
if (ret)
return log_msg_ret("no gpe0-sts", ret);
upriv->gpe0_sts_reg += upriv->acpi_base;
ret = dev_read_u32(dev, "gpe0-en", &upriv->gpe0_en_reg);
if (ret)
return log_msg_ret("no gpe0-en", ret);
upriv->gpe0_en_reg += upriv->acpi_base;
return 0;
}
UCLASS_DRIVER(acpi_pmc) = {
.id = UCLASS_ACPI_PMC,
.name = "power-mgr",
.per_device_auto = sizeof(struct acpi_pmc_upriv),
};
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