linux/arch/x86/platform/atom/punit_atom_debug.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Intel SOC Punit device state debug driver
 * Punit controls power management for North Complex devices (Graphics
 * blocks, Image Signal Processing, video processing, display, DSP etc.)
 *
 * Copyright (c) 2015, Intel Corporation.
 */

#define pr_fmt(fmt) …

#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/io.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/iosf_mbi.h>

/* Subsystem config/status Video processor */
#define VED_SS_PM0 …
/* Subsystem config/status ISP (Image Signal Processor) */
#define ISP_SS_PM0 …
/* Subsystem config/status Input/output controller */
#define MIO_SS_PM …
/* Shift bits for getting status for video, isp and i/o */
#define SSS_SHIFT …

/* Power gate status reg */
#define PWRGT_STATUS …
/* Shift bits for getting status for graphics rendering */
#define RENDER_POS …
/* Shift bits for getting status for media control */
#define MEDIA_POS …
/* Shift bits for getting status for Valley View/Baytrail display */
#define VLV_DISPLAY_POS …

/* Subsystem config/status display for Cherry Trail SOC */
#define CHT_DSP_SSS …
/* Shift bits for getting status for display */
#define CHT_DSP_SSS_POS …

struct punit_device { … };

static const struct punit_device punit_device_tng[] = …;

static const struct punit_device punit_device_byt[] = …;

static const struct punit_device punit_device_cht[] = …;

static const char * const dstates[] = …;

static int punit_dev_state_show(struct seq_file *seq_file, void *unused)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static struct dentry *punit_dbg_file;

static void punit_dbgfs_register(struct punit_device *punit_device)
{ … }

static void punit_dbgfs_unregister(void)
{ … }

#if defined(CONFIG_ACPI) && defined(CONFIG_SUSPEND)
static const struct punit_device *punit_dev;

static void punit_s2idle_check(void)
{ … }

static struct acpi_s2idle_dev_ops punit_s2idle_ops = …;

static void punit_s2idle_check_register(struct punit_device *punit_device)
{ … }

static void punit_s2idle_check_unregister(void)
{ … }
#else
static void punit_s2idle_check_register(struct punit_device *punit_device) {}
static void punit_s2idle_check_unregister(void) {}
#endif

#define X86_MATCH(vfm, data) …

static const struct x86_cpu_id intel_punit_cpu_ids[] = …;
MODULE_DEVICE_TABLE(x86cpu, intel_punit_cpu_ids);

static int __init punit_atom_debug_init(void)
{ … }

static void __exit punit_atom_debug_exit(void)
{ … }

module_init(…) …;
module_exit(punit_atom_debug_exit);

MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;