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platform/x86: intel/pmc: Relocate Tiger Lake PCH support
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Create tgl.c for Tiger Lake PCH specific structures and init().
This file supports Tiger Lake, Elkhart Lake, Rocket Lake,
Alder Lake mobile, Alder Lake N and Raptor Lake P platforms.
There are no functional changes involved.

Cc: David E Box <david.e.box@linux.intel.com>
Reviewed-by: "David E. Box" <david.e.box@linux.intel.com>
Signed-off-by: Gayatri Kammela <gayatri.kammela@linux.intel.com>
Signed-off-by: "David E. Box" <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20221114183257.2067662-7-gayatri.kammela@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Gayatri Kammela authored and Hans de Goede committed Nov 21, 2022
1 parent fd2ed6d commit 92f530e
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Showing 4 changed files with 285 additions and 264 deletions.
2 changes: 1 addition & 1 deletion drivers/platform/x86/intel/pmc/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
# Intel x86 Platform-Specific Drivers
#

intel_pmc_core-y := core.o spt.o cnp.o icl.o
intel_pmc_core-y := core.o spt.o cnp.o icl.o tgl.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
intel_pmc_core_pltdrv-y := pltdrv.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core_pltdrv.o
264 changes: 1 addition & 263 deletions drivers/platform/x86/intel/pmc/core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,6 @@

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/acpi.h>
#include <linux/bitfield.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
Expand All @@ -21,20 +20,14 @@
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/uaccess.h>
#include <linux/uuid.h>

#include <acpi/acpi_bus.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/msr.h>
#include <asm/tsc.h>

#include "core.h"

#define ACPI_S0IX_DSM_UUID "57a6512e-3979-4e9d-9708-ff13b2508972"
#define ACPI_GET_LOW_MODE_REGISTERS 1

/* Maximum number of modes supported by platfoms that has low power mode capability */
const char *pmc_lpm_modes[] = {
"S0i2.0",
Expand All @@ -60,245 +53,6 @@ const struct pmc_bit_map msr_map[] = {
{}
};

static const struct pmc_bit_map tgl_pfear_map[] = {
{"PSF9", BIT(0)},
{"RES_66", BIT(1)},
{"RES_67", BIT(2)},
{"RES_68", BIT(3)},
{"RES_69", BIT(4)},
{"RES_70", BIT(5)},
{"TBTLSX", BIT(6)},
{}
};

static const struct pmc_bit_map *ext_tgl_pfear_map[] = {
/*
* Check intel_pmc_core_ids[] users of tgl_reg_map for
* a list of core SoCs using this.
*/
cnp_pfear_map,
tgl_pfear_map,
NULL
};

static const struct pmc_bit_map tgl_clocksource_status_map[] = {
{"USB2PLL_OFF_STS", BIT(18)},
{"PCIe/USB3.1_Gen2PLL_OFF_STS", BIT(19)},
{"PCIe_Gen3PLL_OFF_STS", BIT(20)},
{"OPIOPLL_OFF_STS", BIT(21)},
{"OCPLL_OFF_STS", BIT(22)},
{"MainPLL_OFF_STS", BIT(23)},
{"MIPIPLL_OFF_STS", BIT(24)},
{"Fast_XTAL_Osc_OFF_STS", BIT(25)},
{"AC_Ring_Osc_OFF_STS", BIT(26)},
{"MC_Ring_Osc_OFF_STS", BIT(27)},
{"SATAPLL_OFF_STS", BIT(29)},
{"XTAL_USB2PLL_OFF_STS", BIT(31)},
{}
};

static const struct pmc_bit_map tgl_power_gating_status_map[] = {
{"CSME_PG_STS", BIT(0)},
{"SATA_PG_STS", BIT(1)},
{"xHCI_PG_STS", BIT(2)},
{"UFSX2_PG_STS", BIT(3)},
{"OTG_PG_STS", BIT(5)},
{"SPA_PG_STS", BIT(6)},
{"SPB_PG_STS", BIT(7)},
{"SPC_PG_STS", BIT(8)},
{"SPD_PG_STS", BIT(9)},
{"SPE_PG_STS", BIT(10)},
{"SPF_PG_STS", BIT(11)},
{"LSX_PG_STS", BIT(13)},
{"P2SB_PG_STS", BIT(14)},
{"PSF_PG_STS", BIT(15)},
{"SBR_PG_STS", BIT(16)},
{"OPIDMI_PG_STS", BIT(17)},
{"THC0_PG_STS", BIT(18)},
{"THC1_PG_STS", BIT(19)},
{"GBETSN_PG_STS", BIT(20)},
{"GBE_PG_STS", BIT(21)},
{"LPSS_PG_STS", BIT(22)},
{"MMP_UFSX2_PG_STS", BIT(23)},
{"MMP_UFSX2B_PG_STS", BIT(24)},
{"FIA_PG_STS", BIT(25)},
{}
};

static const struct pmc_bit_map tgl_d3_status_map[] = {
{"ADSP_D3_STS", BIT(0)},
{"SATA_D3_STS", BIT(1)},
{"xHCI0_D3_STS", BIT(2)},
{"xDCI1_D3_STS", BIT(5)},
{"SDX_D3_STS", BIT(6)},
{"EMMC_D3_STS", BIT(7)},
{"IS_D3_STS", BIT(8)},
{"THC0_D3_STS", BIT(9)},
{"THC1_D3_STS", BIT(10)},
{"GBE_D3_STS", BIT(11)},
{"GBE_TSN_D3_STS", BIT(12)},
{}
};

static const struct pmc_bit_map tgl_vnn_req_status_map[] = {
{"GPIO_COM0_VNN_REQ_STS", BIT(1)},
{"GPIO_COM1_VNN_REQ_STS", BIT(2)},
{"GPIO_COM2_VNN_REQ_STS", BIT(3)},
{"GPIO_COM3_VNN_REQ_STS", BIT(4)},
{"GPIO_COM4_VNN_REQ_STS", BIT(5)},
{"GPIO_COM5_VNN_REQ_STS", BIT(6)},
{"Audio_VNN_REQ_STS", BIT(7)},
{"ISH_VNN_REQ_STS", BIT(8)},
{"CNVI_VNN_REQ_STS", BIT(9)},
{"eSPI_VNN_REQ_STS", BIT(10)},
{"Display_VNN_REQ_STS", BIT(11)},
{"DTS_VNN_REQ_STS", BIT(12)},
{"SMBUS_VNN_REQ_STS", BIT(14)},
{"CSME_VNN_REQ_STS", BIT(15)},
{"SMLINK0_VNN_REQ_STS", BIT(16)},
{"SMLINK1_VNN_REQ_STS", BIT(17)},
{"CLINK_VNN_REQ_STS", BIT(20)},
{"DCI_VNN_REQ_STS", BIT(21)},
{"ITH_VNN_REQ_STS", BIT(22)},
{"CSME_VNN_REQ_STS", BIT(24)},
{"GBE_VNN_REQ_STS", BIT(25)},
{}
};

static const struct pmc_bit_map tgl_vnn_misc_status_map[] = {
{"CPU_C10_REQ_STS_0", BIT(0)},
{"PCIe_LPM_En_REQ_STS_3", BIT(3)},
{"ITH_REQ_STS_5", BIT(5)},
{"CNVI_REQ_STS_6", BIT(6)},
{"ISH_REQ_STS_7", BIT(7)},
{"USB2_SUS_PG_Sys_REQ_STS_10", BIT(10)},
{"PCIe_Clk_REQ_STS_12", BIT(12)},
{"MPHY_Core_DL_REQ_STS_16", BIT(16)},
{"Break-even_En_REQ_STS_17", BIT(17)},
{"Auto-demo_En_REQ_STS_18", BIT(18)},
{"MPHY_SUS_REQ_STS_22", BIT(22)},
{"xDCI_attached_REQ_STS_24", BIT(24)},
{}
};

static const struct pmc_bit_map tgl_signal_status_map[] = {
{"LSX_Wake0_En_STS", BIT(0)},
{"LSX_Wake0_Pol_STS", BIT(1)},
{"LSX_Wake1_En_STS", BIT(2)},
{"LSX_Wake1_Pol_STS", BIT(3)},
{"LSX_Wake2_En_STS", BIT(4)},
{"LSX_Wake2_Pol_STS", BIT(5)},
{"LSX_Wake3_En_STS", BIT(6)},
{"LSX_Wake3_Pol_STS", BIT(7)},
{"LSX_Wake4_En_STS", BIT(8)},
{"LSX_Wake4_Pol_STS", BIT(9)},
{"LSX_Wake5_En_STS", BIT(10)},
{"LSX_Wake5_Pol_STS", BIT(11)},
{"LSX_Wake6_En_STS", BIT(12)},
{"LSX_Wake6_Pol_STS", BIT(13)},
{"LSX_Wake7_En_STS", BIT(14)},
{"LSX_Wake7_Pol_STS", BIT(15)},
{"Intel_Se_IO_Wake0_En_STS", BIT(16)},
{"Intel_Se_IO_Wake0_Pol_STS", BIT(17)},
{"Intel_Se_IO_Wake1_En_STS", BIT(18)},
{"Intel_Se_IO_Wake1_Pol_STS", BIT(19)},
{"Int_Timer_SS_Wake0_En_STS", BIT(20)},
{"Int_Timer_SS_Wake0_Pol_STS", BIT(21)},
{"Int_Timer_SS_Wake1_En_STS", BIT(22)},
{"Int_Timer_SS_Wake1_Pol_STS", BIT(23)},
{"Int_Timer_SS_Wake2_En_STS", BIT(24)},
{"Int_Timer_SS_Wake2_Pol_STS", BIT(25)},
{"Int_Timer_SS_Wake3_En_STS", BIT(26)},
{"Int_Timer_SS_Wake3_Pol_STS", BIT(27)},
{"Int_Timer_SS_Wake4_En_STS", BIT(28)},
{"Int_Timer_SS_Wake4_Pol_STS", BIT(29)},
{"Int_Timer_SS_Wake5_En_STS", BIT(30)},
{"Int_Timer_SS_Wake5_Pol_STS", BIT(31)},
{}
};

static const struct pmc_bit_map *tgl_lpm_maps[] = {
tgl_clocksource_status_map,
tgl_power_gating_status_map,
tgl_d3_status_map,
tgl_vnn_req_status_map,
tgl_vnn_misc_status_map,
tgl_signal_status_map,
NULL
};

static const struct pmc_reg_map tgl_reg_map = {
.pfear_sts = ext_tgl_pfear_map,
.slp_s0_offset = CNP_PMC_SLP_S0_RES_COUNTER_OFFSET,
.slp_s0_res_counter_step = TGL_PMC_SLP_S0_RES_COUNTER_STEP,
.ltr_show_sts = cnp_ltr_show_map,
.msr_sts = msr_map,
.ltr_ignore_offset = CNP_PMC_LTR_IGNORE_OFFSET,
.regmap_length = CNP_PMC_MMIO_REG_LEN,
.ppfear0_offset = CNP_PMC_HOST_PPFEAR0A,
.ppfear_buckets = ICL_PPFEAR_NUM_ENTRIES,
.pm_cfg_offset = CNP_PMC_PM_CFG_OFFSET,
.pm_read_disable_bit = CNP_PMC_READ_DISABLE_BIT,
.ltr_ignore_max = TGL_NUM_IP_IGN_ALLOWED,
.lpm_num_maps = TGL_LPM_NUM_MAPS,
.lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2,
.lpm_sts_latch_en_offset = TGL_LPM_STS_LATCH_EN_OFFSET,
.lpm_en_offset = TGL_LPM_EN_OFFSET,
.lpm_priority_offset = TGL_LPM_PRI_OFFSET,
.lpm_residency_offset = TGL_LPM_RESIDENCY_OFFSET,
.lpm_sts = tgl_lpm_maps,
.lpm_status_offset = TGL_LPM_STATUS_OFFSET,
.lpm_live_status_offset = TGL_LPM_LIVE_STATUS_OFFSET,
.etr3_offset = ETR3_OFFSET,
};

static void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev)
{
struct pmc_dev *pmcdev = platform_get_drvdata(pdev);
const int num_maps = pmcdev->map->lpm_num_maps;
u32 lpm_size = LPM_MAX_NUM_MODES * num_maps * 4;
union acpi_object *out_obj;
struct acpi_device *adev;
guid_t s0ix_dsm_guid;
u32 *lpm_req_regs, *addr;

adev = ACPI_COMPANION(&pdev->dev);
if (!adev)
return;

guid_parse(ACPI_S0IX_DSM_UUID, &s0ix_dsm_guid);

out_obj = acpi_evaluate_dsm(adev->handle, &s0ix_dsm_guid, 0,
ACPI_GET_LOW_MODE_REGISTERS, NULL);
if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) {
u32 size = out_obj->buffer.length;

if (size != lpm_size) {
acpi_handle_debug(adev->handle,
"_DSM returned unexpected buffer size, have %u, expect %u\n",
size, lpm_size);
goto free_acpi_obj;
}
} else {
acpi_handle_debug(adev->handle,
"_DSM function 0 evaluation failed\n");
goto free_acpi_obj;
}

addr = (u32 *)out_obj->buffer.pointer;

lpm_req_regs = devm_kzalloc(&pdev->dev, lpm_size * sizeof(u32),
GFP_KERNEL);
if (!lpm_req_regs)
goto free_acpi_obj;

memcpy(lpm_req_regs, addr, lpm_size);
pmcdev->lpm_req_regs = lpm_req_regs;

free_acpi_obj:
ACPI_FREE(out_obj);
}

/* Alder Lake: PGD PFET Enable Ack Status Register(s) bitmap */
static const struct pmc_bit_map adl_pfear_map[] = {
{"SPI/eSPI", BIT(2)},
Expand Down Expand Up @@ -981,7 +735,7 @@ static int pmc_core_pll_show(struct seq_file *s, void *unused)
}
DEFINE_SHOW_ATTRIBUTE(pmc_core_pll);

static int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value)
int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value)
{
const struct pmc_reg_map *map = pmcdev->map;
u32 reg;
Expand Down Expand Up @@ -1549,22 +1303,6 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev)
}
}

void tgl_core_configure(struct pmc_dev *pmcdev)
{
pmc_core_get_tgl_lpm_reqs(pmcdev->pdev);
/* Due to a hardware limitation, the GBE LTR blocks PC10
* when a cable is attached. Tell the PMC to ignore it.
*/
dev_dbg(&pmcdev->pdev->dev, "ignoring GBE LTR\n");
pmc_core_send_ltr_ignore(pmcdev, 3);
}

void tgl_core_init(struct pmc_dev *pmcdev)
{
pmcdev->map = &tgl_reg_map;
pmcdev->core_configure = tgl_core_configure;
}

void adl_core_configure(struct pmc_dev *pmcdev)
{
/* Due to a hardware limitation, the GBE LTR blocks PC10
Expand Down
14 changes: 14 additions & 0 deletions drivers/platform/x86/intel/pmc/core.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
#ifndef PMC_CORE_H
#define PMC_CORE_H

#include <linux/acpi.h>
#include <linux/bits.h>
#include <linux/platform_device.h>

Expand Down Expand Up @@ -354,6 +355,19 @@ extern const struct pmc_reg_map cnp_reg_map;
extern const struct pmc_bit_map icl_pfear_map[];
extern const struct pmc_bit_map *ext_icl_pfear_map[];
extern const struct pmc_reg_map icl_reg_map;
extern const struct pmc_bit_map tgl_pfear_map[];
extern const struct pmc_bit_map *ext_tgl_pfear_map[];
extern const struct pmc_bit_map tgl_clocksource_status_map[];
extern const struct pmc_bit_map tgl_power_gating_status_map[];
extern const struct pmc_bit_map tgl_d3_status_map[];
extern const struct pmc_bit_map tgl_vnn_req_status_map[];
extern const struct pmc_bit_map tgl_vnn_misc_status_map[];
extern const struct pmc_bit_map tgl_signal_status_map[];
extern const struct pmc_bit_map *tgl_lpm_maps[];
extern const struct pmc_reg_map tgl_reg_map;

extern void pmc_core_get_tgl_lpm_reqs(struct platform_device *pdev);
extern int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value);

void spt_core_init(struct pmc_dev *pmcdev);
void cnp_core_init(struct pmc_dev *pmcdev);
Expand Down
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