core.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Intel Core SoC Power Management Controller Header File
 *
 * Copyright (c) 2016, Intel Corporation.
 * All Rights Reserved.
 *
 * Authors: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
 *          Vishwanath Somayaji <vishwanath.somayaji@intel.com>
 */

#ifndef PMC_CORE_H
#define PMC_CORE_H

#include <linux/bits.h>

#define PMC_BASE_ADDR_DEFAULT			0xFE000000

/* Sunrise Point Power Management Controller PCI Device ID */
#define SPT_PMC_PCI_DEVICE_ID			0x9d21
#define SPT_PMC_BASE_ADDR_OFFSET		0x48
#define SPT_PMC_SLP_S0_RES_COUNTER_OFFSET	0x13c
#define SPT_PMC_PM_CFG_OFFSET			0x18
#define SPT_PMC_PM_STS_OFFSET			0x1c
#define SPT_PMC_MTPMC_OFFSET			0x20
#define SPT_PMC_MFPMC_OFFSET			0x38
#define SPT_PMC_LTR_IGNORE_OFFSET		0x30C
#define SPT_PMC_VRIC1_OFFSET			0x31c
#define SPT_PMC_MPHY_CORE_STS_0			0x1143
#define SPT_PMC_MPHY_CORE_STS_1			0x1142
#define SPT_PMC_MPHY_COM_STS_0			0x1155
#define SPT_PMC_MMIO_REG_LEN			0x1000
#define SPT_PMC_SLP_S0_RES_COUNTER_STEP		0x68
#define PMC_BASE_ADDR_MASK			~(SPT_PMC_MMIO_REG_LEN - 1)
#define MTPMC_MASK				0xffff0000
#define PPFEAR_MAX_NUM_ENTRIES			12
#define SPT_PPFEAR_NUM_ENTRIES			5
#define SPT_PMC_READ_DISABLE_BIT		0x16
#define SPT_PMC_MSG_FULL_STS_BIT		0x18
#define NUM_RETRIES				100
#define SPT_NUM_IP_IGN_ALLOWED			17

#define SPT_PMC_LTR_CUR_PLT			0x350
#define SPT_PMC_LTR_CUR_ASLT			0x354
#define SPT_PMC_LTR_SPA				0x360
#define SPT_PMC_LTR_SPB				0x364
#define SPT_PMC_LTR_SATA			0x368
#define SPT_PMC_LTR_GBE				0x36C
#define SPT_PMC_LTR_XHCI			0x370
#define SPT_PMC_LTR_RESERVED			0x374
#define SPT_PMC_LTR_ME				0x378
#define SPT_PMC_LTR_EVA				0x37C
#define SPT_PMC_LTR_SPC				0x380
#define SPT_PMC_LTR_AZ				0x384
#define SPT_PMC_LTR_LPSS			0x38C
#define SPT_PMC_LTR_CAM				0x390
#define SPT_PMC_LTR_SPD				0x394
#define SPT_PMC_LTR_SPE				0x398
#define SPT_PMC_LTR_ESPI			0x39C
#define SPT_PMC_LTR_SCC				0x3A0
#define SPT_PMC_LTR_ISH				0x3A4

/* Sunrise Point: PGD PFET Enable Ack Status Registers */
enum ppfear_regs {
	SPT_PMC_XRAM_PPFEAR0A = 0x590,
	SPT_PMC_XRAM_PPFEAR0B,
	SPT_PMC_XRAM_PPFEAR0C,
	SPT_PMC_XRAM_PPFEAR0D,
	SPT_PMC_XRAM_PPFEAR1A,
};

#define SPT_PMC_BIT_PMC				BIT(0)
#define SPT_PMC_BIT_OPI				BIT(1)
#define SPT_PMC_BIT_SPI				BIT(2)
#define SPT_PMC_BIT_XHCI			BIT(3)
#define SPT_PMC_BIT_SPA				BIT(4)
#define SPT_PMC_BIT_SPB				BIT(5)
#define SPT_PMC_BIT_SPC				BIT(6)
#define SPT_PMC_BIT_GBE				BIT(7)

#define SPT_PMC_BIT_SATA			BIT(0)
#define SPT_PMC_BIT_HDA_PGD0			BIT(1)
#define SPT_PMC_BIT_HDA_PGD1			BIT(2)
#define SPT_PMC_BIT_HDA_PGD2			BIT(3)
#define SPT_PMC_BIT_HDA_PGD3			BIT(4)
#define SPT_PMC_BIT_RSVD_0B			BIT(5)
#define SPT_PMC_BIT_LPSS			BIT(6)
#define SPT_PMC_BIT_LPC				BIT(7)

#define SPT_PMC_BIT_SMB				BIT(0)
#define SPT_PMC_BIT_ISH				BIT(1)
#define SPT_PMC_BIT_P2SB			BIT(2)
#define SPT_PMC_BIT_DFX				BIT(3)
#define SPT_PMC_BIT_SCC				BIT(4)
#define SPT_PMC_BIT_RSVD_0C			BIT(5)
#define SPT_PMC_BIT_FUSE			BIT(6)
#define SPT_PMC_BIT_CAMREA			BIT(7)

#define SPT_PMC_BIT_RSVD_0D			BIT(0)
#define SPT_PMC_BIT_USB3_OTG			BIT(1)
#define SPT_PMC_BIT_EXI				BIT(2)
#define SPT_PMC_BIT_CSE				BIT(3)
#define SPT_PMC_BIT_CSME_KVM			BIT(4)
#define SPT_PMC_BIT_CSME_PMT			BIT(5)
#define SPT_PMC_BIT_CSME_CLINK			BIT(6)
#define SPT_PMC_BIT_CSME_PTIO			BIT(7)

#define SPT_PMC_BIT_CSME_USBR			BIT(0)
#define SPT_PMC_BIT_CSME_SUSRAM			BIT(1)
#define SPT_PMC_BIT_CSME_SMT			BIT(2)
#define SPT_PMC_BIT_RSVD_1A			BIT(3)
#define SPT_PMC_BIT_CSME_SMS2			BIT(4)
#define SPT_PMC_BIT_CSME_SMS1			BIT(5)
#define SPT_PMC_BIT_CSME_RTC			BIT(6)
#define SPT_PMC_BIT_CSME_PSF			BIT(7)

#define SPT_PMC_BIT_MPHY_LANE0			BIT(0)
#define SPT_PMC_BIT_MPHY_LANE1			BIT(1)
#define SPT_PMC_BIT_MPHY_LANE2			BIT(2)
#define SPT_PMC_BIT_MPHY_LANE3			BIT(3)
#define SPT_PMC_BIT_MPHY_LANE4			BIT(4)
#define SPT_PMC_BIT_MPHY_LANE5			BIT(5)
#define SPT_PMC_BIT_MPHY_LANE6			BIT(6)
#define SPT_PMC_BIT_MPHY_LANE7			BIT(7)

#define SPT_PMC_BIT_MPHY_LANE8			BIT(0)
#define SPT_PMC_BIT_MPHY_LANE9			BIT(1)
#define SPT_PMC_BIT_MPHY_LANE10			BIT(2)
#define SPT_PMC_BIT_MPHY_LANE11			BIT(3)
#define SPT_PMC_BIT_MPHY_LANE12			BIT(4)
#define SPT_PMC_BIT_MPHY_LANE13			BIT(5)
#define SPT_PMC_BIT_MPHY_LANE14			BIT(6)
#define SPT_PMC_BIT_MPHY_LANE15			BIT(7)

#define SPT_PMC_BIT_MPHY_CMN_LANE0		BIT(0)
#define SPT_PMC_BIT_MPHY_CMN_LANE1		BIT(1)
#define SPT_PMC_BIT_MPHY_CMN_LANE2		BIT(2)
#define SPT_PMC_BIT_MPHY_CMN_LANE3		BIT(3)

#define SPT_PMC_VRIC1_SLPS0LVEN			BIT(13)
#define SPT_PMC_VRIC1_XTALSDQDIS		BIT(22)

/* Cannonlake Power Management Controller register offsets */
#define CNP_PMC_SLPS0_DBG_OFFSET		0x10B4
#define CNP_PMC_PM_CFG_OFFSET			0x1818
#define CNP_PMC_SLP_S0_RES_COUNTER_OFFSET	0x193C
#define CNP_PMC_LTR_IGNORE_OFFSET		0x1B0C
/* Cannonlake: PGD PFET Enable Ack Status Register(s) start */
#define CNP_PMC_HOST_PPFEAR0A			0x1D90

#define CNP_PMC_LATCH_SLPS0_EVENTS		BIT(31)

#define CNP_PMC_MMIO_REG_LEN			0x2000
#define CNP_PPFEAR_NUM_ENTRIES			8
#define CNP_PMC_READ_DISABLE_BIT		22
#define CNP_NUM_IP_IGN_ALLOWED			19
#define CNP_PMC_LTR_CUR_PLT			0x1B50
#define CNP_PMC_LTR_CUR_ASLT			0x1B54
#define CNP_PMC_LTR_SPA				0x1B60
#define CNP_PMC_LTR_SPB				0x1B64
#define CNP_PMC_LTR_SATA			0x1B68
#define CNP_PMC_LTR_GBE				0x1B6C
#define CNP_PMC_LTR_XHCI			0x1B70
#define CNP_PMC_LTR_RESERVED			0x1B74
#define CNP_PMC_LTR_ME				0x1B78
#define CNP_PMC_LTR_EVA				0x1B7C
#define CNP_PMC_LTR_SPC				0x1B80
#define CNP_PMC_LTR_AZ				0x1B84
#define CNP_PMC_LTR_LPSS			0x1B8C
#define CNP_PMC_LTR_CAM				0x1B90
#define CNP_PMC_LTR_SPD				0x1B94
#define CNP_PMC_LTR_SPE				0x1B98
#define CNP_PMC_LTR_ESPI			0x1B9C
#define CNP_PMC_LTR_SCC				0x1BA0
#define CNP_PMC_LTR_ISH				0x1BA4
#define CNP_PMC_LTR_CNV				0x1BF0
#define CNP_PMC_LTR_EMMC			0x1BF4
#define CNP_PMC_LTR_UFSX2			0x1BF8

#define LTR_DECODED_VAL				GENMASK(9, 0)
#define LTR_DECODED_SCALE			GENMASK(12, 10)
#define LTR_REQ_SNOOP				BIT(15)
#define LTR_REQ_NONSNOOP			BIT(31)

#define ICL_PPFEAR_NUM_ENTRIES			9
#define ICL_NUM_IP_IGN_ALLOWED			20
#define ICL_PMC_LTR_WIGIG			0x1BFC
#define ICL_PMC_SLP_S0_RES_COUNTER_STEP		0x64

#define LPM_MAX_NUM_MODES			8
#define LPM_DEFAULT_PRI				{ 7, 6, 2, 5, 4, 1, 3, 0 }

#define GET_X2_COUNTER(v)			((v) >> 1)
#define LPM_STS_LATCH_MODE			BIT(31)

#define TGL_PMC_SLP_S0_RES_COUNTER_STEP		0x7A
#define TGL_PMC_LTR_THC0			0x1C04
#define TGL_PMC_LTR_THC1			0x1C08
#define TGL_NUM_IP_IGN_ALLOWED			23
#define TGL_PMC_LPM_RES_COUNTER_STEP_X2		61	/* 30.5us * 2 */

#define ADL_PMC_LTR_SPF				0x1C00
#define ADL_NUM_IP_IGN_ALLOWED			23
#define ADL_PMC_SLP_S0_RES_COUNTER_OFFSET	0x1098

/*
 * Tigerlake Power Management Controller register offsets
 */
#define TGL_LPM_STS_LATCH_EN_OFFSET		0x1C34
#define TGL_LPM_EN_OFFSET			0x1C78
#define TGL_LPM_RESIDENCY_OFFSET		0x1C80

/* Tigerlake Low Power Mode debug registers */
#define TGL_LPM_STATUS_OFFSET			0x1C3C
#define TGL_LPM_LIVE_STATUS_OFFSET		0x1C5C
#define TGL_LPM_PRI_OFFSET			0x1C7C
#define TGL_LPM_NUM_MAPS			6

/* Extended Test Mode Register 3 (CNL and later) */
#define ETR3_OFFSET				0x1048
#define ETR3_CF9GR				BIT(20)
#define ETR3_CF9LOCK				BIT(31)

/* Extended Test Mode Register LPM bits (TGL and later */
#define ETR3_CLEAR_LPM_EVENTS			BIT(28)

/* Alder Lake Power Management Controller register offsets */
#define ADL_LPM_EN_OFFSET			0x179C
#define ADL_LPM_RESIDENCY_OFFSET		0x17A4
#define ADL_LPM_NUM_MODES			2
#define ADL_LPM_NUM_MAPS			14

/* Alder Lake Low Power Mode debug registers */
#define ADL_LPM_STATUS_OFFSET			0x170C
#define ADL_LPM_PRI_OFFSET			0x17A0
#define ADL_LPM_STATUS_LATCH_EN_OFFSET		0x1704
#define ADL_LPM_LIVE_STATUS_OFFSET		0x1764

static const char *pmc_lpm_modes[] = {
	"S0i2.0",
	"S0i2.1",
	"S0i2.2",
	"S0i3.0",
	"S0i3.1",
	"S0i3.2",
	"S0i3.3",
	"S0i3.4",
	NULL
};

struct pmc_bit_map {
	const char *name;
	u32 bit_mask;
};

/**
 * struct pmc_reg_map - Structure used to define parameter unique to a
			PCH family
 * @pfear_sts:		Maps name of IP block to PPFEAR* bit
 * @mphy_sts:		Maps name of MPHY lane to MPHY status lane status bit
 * @pll_sts:		Maps name of PLL to corresponding bit status
 * @slps0_dbg_maps:	Array of SLP_S0_DBG* registers containing debug info
 * @ltr_show_sts:	Maps PCH IP Names to their MMIO register offsets
 * @slp_s0_offset:	PWRMBASE offset to read SLP_S0 residency
 * @ltr_ignore_offset:	PWRMBASE offset to read/write LTR ignore bit
 * @regmap_length:	Length of memory to map from PWRMBASE address to access
 * @ppfear0_offset:	PWRMBASE offset to to read PPFEAR*
 * @ppfear_buckets:	Number of 8 bits blocks to read all IP blocks from
 *			PPFEAR
 * @pm_cfg_offset:	PWRMBASE offset to PM_CFG register
 * @pm_read_disable_bit: Bit index to read PMC_READ_DISABLE
 * @slps0_dbg_offset:	PWRMBASE offset to SLP_S0_DEBUG_REG*
 *
 * Each PCH has unique set of register offsets and bit indexes. This structure
 * captures them to have a common implementation.
 */
struct pmc_reg_map {
	const struct pmc_bit_map **pfear_sts;
	const struct pmc_bit_map *mphy_sts;
	const struct pmc_bit_map *pll_sts;
	const struct pmc_bit_map **slps0_dbg_maps;
	const struct pmc_bit_map *ltr_show_sts;
	const struct pmc_bit_map *msr_sts;
	const struct pmc_bit_map **lpm_sts;
	const u32 slp_s0_offset;
	const int slp_s0_res_counter_step;
	const u32 ltr_ignore_offset;
	const int regmap_length;
	const u32 ppfear0_offset;
	const int ppfear_buckets;
	const u32 pm_cfg_offset;
	const int pm_read_disable_bit;
	const u32 slps0_dbg_offset;
	const u32 ltr_ignore_max;
	const u32 pm_vric1_offset;
	/* Low Power Mode registers */
	const int lpm_num_maps;
	const int lpm_num_modes;
	const int lpm_res_counter_step_x2;
	const u32 lpm_sts_latch_en_offset;
	const u32 lpm_en_offset;
	const u32 lpm_priority_offset;
	const u32 lpm_residency_offset;
	const u32 lpm_status_offset;
	const u32 lpm_live_status_offset;
	const u32 etr3_offset;
};

/**
 * struct pmc_dev - pmc device structure
 * @base_addr:		contains pmc base address
 * @regbase:		pointer to io-remapped memory location
 * @map:		pointer to pmc_reg_map struct that contains platform
 *			specific attributes
 * @dbgfs_dir:		path to debugfs interface
 * @pmc_xram_read_bit:	flag to indicate whether PMC XRAM shadow registers
 *			used to read MPHY PG and PLL status are available
 * @mutex_lock:		mutex to complete one transcation
 * @check_counters:	On resume, check if counters are getting incremented
 * @pc10_counter:	PC10 residency counter
 * @s0ix_counter:	S0ix residency (step adjusted)
 * @num_lpm_modes:	Count of enabled modes
 * @lpm_en_modes:	Array of enabled modes from lowest to highest priority
 * @lpm_req_regs:	List of substate requirements
 *
 * pmc_dev contains info about power management controller device.
 */
struct pmc_dev {
	u32 base_addr;
	void __iomem *regbase;
	const struct pmc_reg_map *map;
	struct dentry *dbgfs_dir;
	int pmc_xram_read_bit;
	struct mutex lock; /* generic mutex lock for PMC Core */

	bool check_counters; /* Check for counter increments on resume */
	u64 pc10_counter;
	u64 s0ix_counter;
	int num_lpm_modes;
	int lpm_en_modes[LPM_MAX_NUM_MODES];
	u32 *lpm_req_regs;
};

#define pmc_for_each_mode(i, mode, pmcdev)		\
	for (i = 0, mode = pmcdev->lpm_en_modes[i];	\
	     i < pmcdev->num_lpm_modes;			\
	     i++, mode = pmcdev->lpm_en_modes[i])

#define DEFINE_PMC_CORE_ATTR_WRITE(__name)				\
static int __name ## _open(struct inode *inode, struct file *file)	\
{									\
	return single_open(file, __name ## _show, inode->i_private);	\
}									\
									\
static const struct file_operations __name ## _fops = {			\
	.owner		= THIS_MODULE,					\
	.open		= __name ## _open,				\
	.read		= seq_read,					\
	.write		= __name ## _write,				\
	.release	= single_release,				\
}

#endif /* PMC_CORE_H */