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