From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
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 --- drivers/soundwire/Makefile | 3 +- drivers/soundwire/intel.h | 8 ++ drivers/soundwire/intel_ace2x.c | 2 + drivers/soundwire/intel_ace2x_debugfs.c | 147 ++++++++++++++++++++++++ 4 files changed, 159 insertions(+), 1 deletion(-) create mode 100644 drivers/soundwire/intel_ace2x_debugfs.c
diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile index d7212777a927..c57571c82e04 100644 --- a/drivers/soundwire/Makefile +++ b/drivers/soundwire/Makefile @@ -20,7 +20,8 @@ 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
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h index cf9db4906de4..511932c55216 100644 --- a/drivers/soundwire/intel.h +++ b/drivers/soundwire/intel.h @@ -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)) diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c index 623e4fd7db91..1c47bb2adb93 100644 --- a/drivers/soundwire/intel_ace2x.c +++ b/drivers/soundwire/intel_ace2x.c @@ -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); diff --git a/drivers/soundwire/intel_ace2x_debugfs.c b/drivers/soundwire/intel_ace2x_debugfs.c new file mode 100644 index 000000000000..3d24661ffd37 --- /dev/null +++ b/drivers/soundwire/intel_ace2x_debugfs.c @@ -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 */