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soundwire: intel_ace2x: add debugfs support

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Add access to registers in SHIM and SHIM_VS (vendor-specific) areas.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230515071042.2038-11-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-05-15 15:10:26 +08:00 committed by Vinod Koul
parent e52cae0bb4
commit 312316d5a1
4 changed files with 159 additions and 1 deletions
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3
drivers/soundwire/Makefile
View file

@ -24,7 +24,8 @@ soundwire-cadence-y := cadence_master.o
obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
#Intel driver
soundwire-intel-y := intel.o intel_ace2x.o intel_auxdevice.o intel_init.o dmi-quirks.o \
soundwire-intel-y := intel.o intel_ace2x.o intel_ace2x_debugfs.o \
intel_auxdevice.o intel_init.o dmi-quirks.o \
intel_bus_common.o
obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o

8
drivers/soundwire/intel.h
View file

@ -95,6 +95,14 @@ static inline void intel_writew(void __iomem *base, int offset, u16 value)
(sdw)->link_res->hw_ops->cb)
#define SDW_INTEL_OPS(sdw, cb) ((sdw)->link_res->hw_ops->cb)
#ifdef CONFIG_DEBUG_FS
void intel_ace2x_debugfs_init(struct sdw_intel *sdw);
void intel_ace2x_debugfs_exit(struct sdw_intel *sdw);
#else
static inline void intel_ace2x_debugfs_init(struct sdw_intel *sdw) {}
static inline void intel_ace2x_debugfs_exit(struct sdw_intel *sdw) {}
#endif
static inline void sdw_intel_debugfs_init(struct sdw_intel *sdw)
{
if (SDW_INTEL_CHECK_OPS(sdw, debugfs_init))

2
drivers/soundwire/intel_ace2x.c
View file

@ -15,5 +15,7 @@
#include "intel.h"
const struct sdw_intel_hw_ops sdw_intel_lnl_hw_ops = {
.debugfs_init = intel_ace2x_debugfs_init,
.debugfs_exit = intel_ace2x_debugfs_exit,
};
EXPORT_SYMBOL_NS(sdw_intel_lnl_hw_ops, SOUNDWIRE_INTEL);

147
drivers/soundwire/intel_ace2x_debugfs.c Normal file
View file

@ -0,0 +1,147 @@
// SPDX-License-Identifier: GPL-2.0-only
// Copyright(c) 2023 Intel Corporation. All rights reserved.
#include <linux/acpi.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_intel.h>
#include <linux/soundwire/sdw_registers.h>
#include "bus.h"
#include "cadence_master.h"
#include "intel.h"
/*
* debugfs
*/
#ifdef CONFIG_DEBUG_FS
#define RD_BUF (2 * PAGE_SIZE)
static ssize_t intel_sprintf(void __iomem *mem, bool l,
char *buf, size_t pos, unsigned int reg)
{
int value;
if (l)
value = intel_readl(mem, reg);
else
value = intel_readw(mem, reg);
return scnprintf(buf + pos, RD_BUF - pos, "%4x\t%4x\n", reg, value);
}
static int intel_reg_show(struct seq_file *s_file, void *data)
{
struct sdw_intel *sdw = s_file->private;
void __iomem *s = sdw->link_res->shim;
void __iomem *vs_s = sdw->link_res->shim_vs;
ssize_t ret;
u32 pcm_cap;
int pcm_bd;
char *buf;
int j;
buf = kzalloc(RD_BUF, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = scnprintf(buf, RD_BUF, "Register Value\n");
ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");
ret += intel_sprintf(s, true, buf, ret, SDW_SHIM2_LECAP);
ret += intel_sprintf(s, false, buf, ret, SDW_SHIM2_PCMSCAP);
pcm_cap = intel_readw(s, SDW_SHIM2_PCMSCAP);
pcm_bd = FIELD_GET(SDW_SHIM2_PCMSCAP_BSS, pcm_cap);
for (j = 0; j < pcm_bd; j++) {
ret += intel_sprintf(s, false, buf, ret,
SDW_SHIM2_PCMSYCHM(j));
ret += intel_sprintf(s, false, buf, ret,
SDW_SHIM2_PCMSYCHC(j));
}
ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS CLK controls\n");
ret += intel_sprintf(vs_s, true, buf, ret, SDW_SHIM2_INTEL_VS_LVSCTL);
ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS Wake registers\n");
ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_WAKEEN);
ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_WAKESTS);
ret += scnprintf(buf + ret, RD_BUF - ret, "\nVS IOCTL, ACTMCTL\n");
ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_IOCTL);
ret += intel_sprintf(vs_s, false, buf, ret, SDW_SHIM2_INTEL_VS_ACTMCTL);
seq_printf(s_file, "%s", buf);
kfree(buf);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(intel_reg);
static int intel_set_m_datamode(void *data, u64 value)
{
struct sdw_intel *sdw = data;
struct sdw_bus *bus = &sdw->cdns.bus;
if (value > SDW_PORT_DATA_MODE_STATIC_1)
return -EINVAL;
/* Userspace changed the hardware state behind the kernel's back */
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
bus->params.m_data_mode = value;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(intel_set_m_datamode_fops, NULL,
intel_set_m_datamode, "%llu\n");
static int intel_set_s_datamode(void *data, u64 value)
{
struct sdw_intel *sdw = data;
struct sdw_bus *bus = &sdw->cdns.bus;
if (value > SDW_PORT_DATA_MODE_STATIC_1)
return -EINVAL;
/* Userspace changed the hardware state behind the kernel's back */
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
bus->params.s_data_mode = value;
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(intel_set_s_datamode_fops, NULL,
intel_set_s_datamode, "%llu\n");
void intel_ace2x_debugfs_init(struct sdw_intel *sdw)
{
struct dentry *root = sdw->cdns.bus.debugfs;
if (!root)
return;
sdw->debugfs = debugfs_create_dir("intel-sdw", root);
debugfs_create_file("intel-registers", 0400, sdw->debugfs, sdw,
&intel_reg_fops);
debugfs_create_file("intel-m-datamode", 0200, sdw->debugfs, sdw,
&intel_set_m_datamode_fops);
debugfs_create_file("intel-s-datamode", 0200, sdw->debugfs, sdw,
&intel_set_s_datamode_fops);
sdw_cdns_debugfs_init(&sdw->cdns, sdw->debugfs);
}
void intel_ace2x_debugfs_exit(struct sdw_intel *sdw)
{
debugfs_remove_recursive(sdw->debugfs);
}
#endif /* CONFIG_DEBUG_FS */