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// SPDX-License-Identifier: GPL-2.0
/*
* Sandbox PMC for testing
*
* Copyright 2019 Google LLC
*/
#define LOG_CATEGORY UCLASS_ACPI_PMC
#include <common.h>
#include <dm.h>
#include <asm/io.h>
#include <power/acpi_pmc.h>
#define GPIO_GPE_CFG 0x1050
/* Memory mapped IO registers behind PMC_BASE_ADDRESS */
#define PRSTS 0x1000
#define GEN_PMCON1 0x1020
#define GEN_PMCON2 0x1024
#define GEN_PMCON3 0x1028
/* Offset of TCO registers from ACPI base I/O address */
#define TCO_REG_OFFSET 0x60
#define TCO1_STS 0x64
#define TCO2_STS 0x66
#define TCO1_CNT 0x68
#define TCO2_CNT 0x6a
struct sandbox_pmc_priv {
ulong base;
};
static int sandbox_pmc_fill_power_state(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
upriv->tco1_sts = inw(upriv->acpi_base + TCO1_STS);
upriv->tco2_sts = inw(upriv->acpi_base + TCO2_STS);
upriv->prsts = readl(upriv->pmc_bar0 + PRSTS);
upriv->gen_pmcon1 = readl(upriv->pmc_bar0 + GEN_PMCON1);
upriv->gen_pmcon2 = readl(upriv->pmc_bar0 + GEN_PMCON2);
upriv->gen_pmcon3 = readl(upriv->pmc_bar0 + GEN_PMCON3);
return 0;
}
static int sandbox_prev_sleep_state(struct udevice *dev, int prev_sleep_state)
{
return prev_sleep_state;
}
static int sandbox_disable_tco(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
pmc_disable_tco_base(upriv->acpi_base + TCO_REG_OFFSET);
return 0;
}
static int sandbox_pmc_probe(struct udevice *dev)
{
struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
struct udevice *bus;
ulong base;
uclass_first_device(UCLASS_PCI, &bus);
base = dm_pci_read_bar32(dev, 0);
if (base == FDT_ADDR_T_NONE)
return log_msg_ret("No base address", -EINVAL);
upriv->pmc_bar0 = map_sysmem(base, 0x2000);
upriv->gpe_cfg = (u32 *)(upriv->pmc_bar0 + GPIO_GPE_CFG);
return pmc_ofdata_to_uc_platdata(dev);
}
static struct acpi_pmc_ops sandbox_pmc_ops = {
.init = sandbox_pmc_fill_power_state,
.prev_sleep_state = sandbox_prev_sleep_state,
.disable_tco = sandbox_disable_tco,
};
static const struct udevice_id sandbox_pmc_ids[] = {
{ .compatible = "sandbox,pmc" },
{ }
};
U_BOOT_DRIVER(pmc_sandbox) = {
.name = "pmc_sandbox",
.id = UCLASS_ACPI_PMC,
.of_match = sandbox_pmc_ids,
.probe = sandbox_pmc_probe,
.ops = &sandbox_pmc_ops,
.priv_auto_alloc_size = sizeof(struct sandbox_pmc_priv),
};
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