* [PATCH v9 2/2] phy: mediatek: tphy: add debugfs files
2023-03-16 7:14 [PATCH v9 1/2] phy: core: add debugfs files Chunfeng Yun
@ 2023-03-16 7:14 ` Chunfeng Yun
2023-04-03 15:06 ` [PATCH v9 1/2] phy: core: " Vinod Koul
1 sibling, 0 replies; 5+ messages in thread
From: Chunfeng Yun @ 2023-03-16 7:14 UTC (permalink / raw)
To: Vinod Koul
Cc: Chunfeng Yun, Matthias Brugger, AngeloGioacchino Del Regno,
linux-arm-kernel, linux-mediatek, linux-phy, linux-kernel,
Eddie Hung
These debugfs files are mainly used to make eye diagram test easier,
especially helpful to do HQA test for a new IC without efuse enabled.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v9: 1. use the debugfs entry of struct phy instead of private one suggested by Vinod;
2. modify changelog of v8 due to misunderstanding the means of Vinod
v8: abandon patch to create phy debug root file /sys/kernel/debug/phy/
v6~v7: no changes
v5: using common debugfs config CONFIG_DEBUG_FS
v4: fix build warning of sometimes uninitialized variable
v3: fix typo of "debugfs" suggested by AngeloGioacchino
v2: add CONFIG_PHY_MTK_TPHY_DEBUGFS suggested by AngeloGioacchino
---
drivers/phy/mediatek/phy-mtk-tphy.c | 356 ++++++++++++++++++++++++++++
1 file changed, 356 insertions(+)
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index e906a82791bd..0d110e50bbfd 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -7,6 +7,7 @@
#include <dt-bindings/phy/phy.h>
#include <linux/clk.h>
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
@@ -264,6 +265,8 @@
#define TPHY_CLKS_CNT 2
+#define USER_BUF_LEN(count) min_t(size_t, 8, (count))
+
enum mtk_phy_version {
MTK_PHY_V1 = 1,
MTK_PHY_V2,
@@ -336,6 +339,358 @@ struct mtk_tphy {
int src_coef; /* coefficient for slew rate calibrate */
};
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+
+enum u2_phy_params {
+ U2P_EYE_VRT = 0,
+ U2P_EYE_TERM,
+ U2P_EFUSE_EN,
+ U2P_EFUSE_INTR,
+ U2P_DISCTH,
+ U2P_PRE_EMPHASIS,
+};
+
+enum u3_phy_params {
+ U3P_EFUSE_EN = 0,
+ U3P_EFUSE_INTR,
+ U3P_EFUSE_TX_IMP,
+ U3P_EFUSE_RX_IMP,
+};
+
+static const char *const u2_phy_files[] = {
+ [U2P_EYE_VRT] = "vrt",
+ [U2P_EYE_TERM] = "term",
+ [U2P_EFUSE_EN] = "efuse",
+ [U2P_EFUSE_INTR] = "intr",
+ [U2P_DISCTH] = "discth",
+ [U2P_PRE_EMPHASIS] = "preemph",
+};
+
+static const char *const u3_phy_files[] = {
+ [U3P_EFUSE_EN] = "efuse",
+ [U3P_EFUSE_INTR] = "intr",
+ [U3P_EFUSE_TX_IMP] = "tx-imp",
+ [U3P_EFUSE_RX_IMP] = "rx-imp",
+};
+
+static int u2_phy_params_show(struct seq_file *sf, void *unused)
+{
+ struct mtk_phy_instance *inst = sf->private;
+ const char *fname = file_dentry(sf->file)->d_iname;
+ struct u2phy_banks *u2_banks = &inst->u2_banks;
+ void __iomem *com = u2_banks->com;
+ u32 max = 0;
+ u32 tmp = 0;
+ u32 val = 0;
+ int ret;
+
+ ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+ if (ret < 0)
+ return ret;
+
+ switch (ret) {
+ case U2P_EYE_VRT:
+ tmp = readl(com + U3P_USBPHYACR1);
+ val = FIELD_GET(PA1_RG_VRT_SEL, tmp);
+ max = FIELD_MAX(PA1_RG_VRT_SEL);
+ break;
+
+ case U2P_EYE_TERM:
+ tmp = readl(com + U3P_USBPHYACR1);
+ val = FIELD_GET(PA1_RG_TERM_SEL, tmp);
+ max = FIELD_MAX(PA1_RG_TERM_SEL);
+ break;
+
+ case U2P_EFUSE_EN:
+ if (u2_banks->misc) {
+ tmp = readl(u2_banks->misc + U3P_MISC_REG1);
+ max = 1;
+ }
+
+ val = !!(tmp & MR1_EFUSE_AUTO_LOAD_DIS);
+ break;
+
+ case U2P_EFUSE_INTR:
+ tmp = readl(com + U3P_USBPHYACR1);
+ val = FIELD_GET(PA1_RG_INTR_CAL, tmp);
+ max = FIELD_MAX(PA1_RG_INTR_CAL);
+ break;
+
+ case U2P_DISCTH:
+ tmp = readl(com + U3P_USBPHYACR6);
+ val = FIELD_GET(PA6_RG_U2_DISCTH, tmp);
+ max = FIELD_MAX(PA6_RG_U2_DISCTH);
+ break;
+
+ case U2P_PRE_EMPHASIS:
+ tmp = readl(com + U3P_USBPHYACR6);
+ val = FIELD_GET(PA6_RG_U2_PRE_EMP, tmp);
+ max = FIELD_MAX(PA6_RG_U2_PRE_EMP);
+ break;
+
+ default:
+ seq_printf(sf, "invalid, %d\n", ret);
+ break;
+ }
+
+ seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
+
+ return 0;
+}
+
+static int u2_phy_params_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, u2_phy_params_show, inode->i_private);
+}
+
+static ssize_t u2_phy_params_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ const char *fname = file_dentry(file)->d_iname;
+ struct seq_file *sf = file->private_data;
+ struct mtk_phy_instance *inst = sf->private;
+ struct u2phy_banks *u2_banks = &inst->u2_banks;
+ void __iomem *com = u2_banks->com;
+ ssize_t rc;
+ u32 val;
+ int ret;
+
+ rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
+ if (rc)
+ return rc;
+
+ ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+ if (ret < 0)
+ return (ssize_t)ret;
+
+ switch (ret) {
+ case U2P_EYE_VRT:
+ mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_VRT_SEL, val);
+ break;
+
+ case U2P_EYE_TERM:
+ mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_TERM_SEL, val);
+ break;
+
+ case U2P_EFUSE_EN:
+ if (u2_banks->misc)
+ mtk_phy_update_field(u2_banks->misc + U3P_MISC_REG1,
+ MR1_EFUSE_AUTO_LOAD_DIS, !!val);
+ break;
+
+ case U2P_EFUSE_INTR:
+ mtk_phy_update_field(com + U3P_USBPHYACR1, PA1_RG_INTR_CAL, val);
+ break;
+
+ case U2P_DISCTH:
+ mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_DISCTH, val);
+ break;
+
+ case U2P_PRE_EMPHASIS:
+ mtk_phy_update_field(com + U3P_USBPHYACR6, PA6_RG_U2_PRE_EMP, val);
+ break;
+
+ default:
+ break;
+ }
+
+ return count;
+}
+
+static const struct file_operations u2_phy_fops = {
+ .open = u2_phy_params_open,
+ .write = u2_phy_params_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void u2_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
+{
+ u32 count = ARRAY_SIZE(u2_phy_files);
+ int i;
+
+ for (i = 0; i < count; i++)
+ debugfs_create_file(u2_phy_files[i], 0644, inst->phy->debugfs,
+ inst, &u2_phy_fops);
+}
+
+static int u3_phy_params_show(struct seq_file *sf, void *unused)
+{
+ struct mtk_phy_instance *inst = sf->private;
+ const char *fname = file_dentry(sf->file)->d_iname;
+ struct u3phy_banks *u3_banks = &inst->u3_banks;
+ u32 val = 0;
+ u32 max = 0;
+ u32 tmp;
+ int ret;
+
+ ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+ if (ret < 0)
+ return ret;
+
+ switch (ret) {
+ case U3P_EFUSE_EN:
+ tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RSV);
+ val = !!(tmp & P3D_RG_EFUSE_AUTO_LOAD_DIS);
+ max = 1;
+ break;
+
+ case U3P_EFUSE_INTR:
+ tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG0);
+ val = FIELD_GET(P3A_RG_IEXT_INTR, tmp);
+ max = FIELD_MAX(P3A_RG_IEXT_INTR);
+ break;
+
+ case U3P_EFUSE_TX_IMP:
+ tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL0);
+ val = FIELD_GET(P3D_RG_TX_IMPEL, tmp);
+ max = FIELD_MAX(P3D_RG_TX_IMPEL);
+ break;
+
+ case U3P_EFUSE_RX_IMP:
+ tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL1);
+ val = FIELD_GET(P3D_RG_RX_IMPEL, tmp);
+ max = FIELD_MAX(P3D_RG_RX_IMPEL);
+ break;
+
+ default:
+ seq_printf(sf, "invalid, %d\n", ret);
+ break;
+ }
+
+ seq_printf(sf, "%s : %d [0, %d]\n", fname, val, max);
+
+ return 0;
+}
+
+static int u3_phy_params_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, u3_phy_params_show, inode->i_private);
+}
+
+static ssize_t u3_phy_params_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ const char *fname = file_dentry(file)->d_iname;
+ struct seq_file *sf = file->private_data;
+ struct mtk_phy_instance *inst = sf->private;
+ struct u3phy_banks *u3_banks = &inst->u3_banks;
+ void __iomem *phyd = u3_banks->phyd;
+ ssize_t rc;
+ u32 val;
+ int ret;
+
+ rc = kstrtouint_from_user(ubuf, USER_BUF_LEN(count), 0, &val);
+ if (rc)
+ return rc;
+
+ ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+ if (ret < 0)
+ return (ssize_t)ret;
+
+ switch (ret) {
+ case U3P_EFUSE_EN:
+ mtk_phy_update_field(phyd + U3P_U3_PHYD_RSV,
+ P3D_RG_EFUSE_AUTO_LOAD_DIS, !!val);
+ break;
+
+ case U3P_EFUSE_INTR:
+ mtk_phy_update_field(u3_banks->phya + U3P_U3_PHYA_REG0,
+ P3A_RG_IEXT_INTR, val);
+ break;
+
+ case U3P_EFUSE_TX_IMP:
+ mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_TX_IMPEL, val);
+ mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL0, P3D_RG_FORCE_TX_IMPEL);
+ break;
+
+ case U3P_EFUSE_RX_IMP:
+ mtk_phy_update_field(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_RX_IMPEL, val);
+ mtk_phy_set_bits(phyd + U3P_U3_PHYD_IMPCAL1, P3D_RG_FORCE_RX_IMPEL);
+ break;
+
+ default:
+ break;
+ }
+
+ return count;
+}
+
+static const struct file_operations u3_phy_fops = {
+ .open = u3_phy_params_open,
+ .write = u3_phy_params_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void u3_phy_dbgfs_files_create(struct mtk_phy_instance *inst)
+{
+ u32 count = ARRAY_SIZE(u3_phy_files);
+ int i;
+
+ for (i = 0; i < count; i++)
+ debugfs_create_file(u3_phy_files[i], 0644, inst->phy->debugfs,
+ inst, &u3_phy_fops);
+}
+
+static int phy_type_show(struct seq_file *sf, void *unused)
+{
+ struct mtk_phy_instance *inst = sf->private;
+ const char *type;
+
+ switch (inst->type) {
+ case PHY_TYPE_USB2:
+ type = "USB2";
+ break;
+ case PHY_TYPE_USB3:
+ type = "USB3";
+ break;
+ case PHY_TYPE_PCIE:
+ type = "PCIe";
+ break;
+ case PHY_TYPE_SGMII:
+ type = "SGMII";
+ break;
+ case PHY_TYPE_SATA:
+ type = "SATA";
+ break;
+ default:
+ type = "";
+ }
+
+ seq_printf(sf, "%s\n", type);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(phy_type);
+
+/* these files will be removed when phy is released by phy core */
+static void phy_debugfs_init(struct mtk_phy_instance *inst)
+{
+ debugfs_create_file("type", 0444, inst->phy->debugfs, inst, &phy_type_fops);
+
+ switch (inst->type) {
+ case PHY_TYPE_USB2:
+ u2_phy_dbgfs_files_create(inst);
+ break;
+ case PHY_TYPE_USB3:
+ case PHY_TYPE_PCIE:
+ u3_phy_dbgfs_files_create(inst);
+ break;
+ default:
+ break;
+ }
+}
+
+#else
+
+static void phy_debugfs_init(struct mtk_phy_instance *inst)
+{}
+
+#endif
+
static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
struct mtk_phy_instance *instance)
{
@@ -1140,6 +1495,7 @@ static struct phy *mtk_phy_xlate(struct device *dev,
phy_parse_property(tphy, instance);
phy_type_set(instance);
+ phy_debugfs_init(instance);
return instance->phy;
}
--
2.18.0
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^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH v9 1/2] phy: core: add debugfs files
2023-03-16 7:14 [PATCH v9 1/2] phy: core: add debugfs files Chunfeng Yun
2023-03-16 7:14 ` [PATCH v9 2/2] phy: mediatek: tphy: " Chunfeng Yun
@ 2023-04-03 15:06 ` Vinod Koul
2023-04-07 5:30 ` Chunfeng Yun (云春峰)
2023-04-07 5:33 ` Chunfeng Yun (云春峰)
1 sibling, 2 replies; 5+ messages in thread
From: Vinod Koul @ 2023-04-03 15:06 UTC (permalink / raw)
To: Chunfeng Yun
Cc: Matthias Brugger, AngeloGioacchino Del Regno, linux-arm-kernel,
linux-mediatek, linux-phy, linux-kernel, Eddie Hung
On 16-03-23, 15:14, Chunfeng Yun wrote:
> Add a debugfs root for phy class, and create a debugfs directory under
> the root when create phy, then phy drivers can add debugfs files.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> v9: create a 'phy' debugfs root, add a debugfs entry in struct phy suggested by Vinod;
>
> No v8 sent out;
>
> v2~v7: no changes
> ---
> drivers/phy/phy-core.c | 14 ++++++++++++++
> include/linux/phy/phy.h | 2 ++
> 2 files changed, 16 insertions(+)
>
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 9951efc03eaa..05715352881e 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -11,6 +11,7 @@
> #include <linux/export.h>
> #include <linux/module.h>
> #include <linux/err.h>
> +#include <linux/debugfs.h>
> #include <linux/device.h>
> #include <linux/slab.h>
> #include <linux/of.h>
> @@ -20,6 +21,7 @@
> #include <linux/regulator/consumer.h>
>
> static struct class *phy_class;
> +static struct dentry *phy_debugfs_root;
> static DEFINE_MUTEX(phy_provider_mutex);
> static LIST_HEAD(phy_provider_list);
> static LIST_HEAD(phys);
> @@ -996,6 +998,8 @@ struct phy *phy_create(struct device *dev, struct device_node *node,
> pm_runtime_no_callbacks(&phy->dev);
> }
>
> + phy->debugfs = debugfs_create_dir(dev_name(&phy->dev), phy_debugfs_root);
> +
> return phy;
>
> put_dev:
> @@ -1226,6 +1230,7 @@ static void phy_release(struct device *dev)
>
> phy = to_phy(dev);
> dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
> + debugfs_remove_recursive(phy->debugfs);
> regulator_put(phy->pwr);
> ida_simple_remove(&phy_ida, phy->id);
> kfree(phy);
> @@ -1242,6 +1247,15 @@ static int __init phy_core_init(void)
>
> phy_class->dev_release = phy_release;
>
> + phy_debugfs_root = debugfs_create_dir("phy", NULL);
> +
> return 0;
> }
> device_initcall(phy_core_init);
> +
> +static void __exit phy_core_exit(void)
> +{
> + debugfs_remove_recursive(phy_debugfs_root);
This should be moved to phy_release() we want the debugfs to be cleaned
first
> + class_destroy(phy_class);
hmmm we are missing this already, that might be an issue!
> +}
> +module_exit(phy_core_exit);
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index 3a570bc59fc7..f6d607ef0e80 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
> @@ -148,6 +148,7 @@ struct phy_attrs {
> * @power_count: used to protect when the PHY is used by multiple consumers
> * @attrs: used to specify PHY specific attributes
> * @pwr: power regulator associated with the phy
> + * @debugfs: debugfs directory
> */
> struct phy {
> struct device dev;
> @@ -158,6 +159,7 @@ struct phy {
> int power_count;
> struct phy_attrs attrs;
> struct regulator *pwr;
> + struct dentry *debugfs;
> };
>
> /**
> --
> 2.18.0
--
~Vinod
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^ permalink raw reply [flat|nested] 5+ messages in thread