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Message-ID: <20240512214035.43161-1-mail@mariuszachmann.de>
Date: Sun, 12 May 2024 23:40:34 +0200
From: Marius Zachmann <mail@...iuszachmann.de>
To: Guenter Roeck <linux@...ck-us.net>
Cc: Marius Zachmann <mail@...iuszachmann.de>,
Jean Delvare <jdelvare@...e.com>,
Jonathan Corbet <corbet@....net>,
linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] Add firmware and bootloader information
This patch adds:
- Reading the firmware and bootloader version of the device
- Debugfs entries: firmware_version and bootloader_version
- Updated documentation
Signed-off-by: Marius Zachmann <mail@...iuszachmann.de>
---
Documentation/hwmon/corsair-cpro.rst | 8 +++
drivers/hwmon/corsair-cpro.c | 80 ++++++++++++++++++++++++++++
2 files changed, 88 insertions(+)
diff --git a/Documentation/hwmon/corsair-cpro.rst b/Documentation/hwmon/corsair-cpro.rst
index 751f95476b57..11135d7ec6b9 100644
--- a/Documentation/hwmon/corsair-cpro.rst
+++ b/Documentation/hwmon/corsair-cpro.rst
@@ -39,3 +39,11 @@ fan[1-6]_target Sets fan speed target rpm.
pwm[1-6] Sets the fan speed. Values from 0-255. Can only be read if pwm
was set directly.
======================= =====================================================================
+
+Debugfs entries
+---------------
+
+======================= ===========================
+firmware_version Version of the firmware
+bootloader_version Version of the bootloader
+======================= ===========================
diff --git a/drivers/hwmon/corsair-cpro.c b/drivers/hwmon/corsair-cpro.c
index 3e63666a61bd..4be8a98250a9 100644
--- a/drivers/hwmon/corsair-cpro.c
+++ b/drivers/hwmon/corsair-cpro.c
@@ -10,11 +10,13 @@
#include <linux/bitops.h>
#include <linux/completion.h>
+#include <linux/debugfs.h>
#include <linux/hid.h>
#include <linux/hwmon.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
@@ -28,6 +30,8 @@
#define LABEL_LENGTH 11
#define REQ_TIMEOUT 300
+#define CTL_GET_FW_VER 0x02 /* returns the firmware version in bytes 1-3 */
+#define CTL_GET_BL_VER 0x06 /* returns the bootloader version in bytes 1-2 */
#define CTL_GET_TMP_CNCT 0x10 /*
* returns in bytes 1-4 for each temp sensor:
* 0 not connected
@@ -78,6 +82,7 @@
struct ccp_device {
struct hid_device *hdev;
struct device *hwmon_dev;
+ struct dentry *debugfs;
/* For reinitializing the completion below */
spinlock_t wait_input_report_lock;
struct completion wait_input_report;
@@ -88,6 +93,8 @@ struct ccp_device {
DECLARE_BITMAP(temp_cnct, NUM_TEMP_SENSORS);
DECLARE_BITMAP(fan_cnct, NUM_FANS);
char fan_label[6][LABEL_LENGTH];
+ u8 firmware_ver[3];
+ u8 bootloader_ver[2];
};
/* converts response error in buffer to errno */
@@ -496,6 +503,71 @@ static int get_temp_cnct(struct ccp_device *ccp)
return 0;
}
+/* read firmware and bootloader version */
+static int get_fw_version(struct ccp_device *ccp)
+{
+ int ret;
+
+ ret = send_usb_cmd(ccp, CTL_GET_FW_VER, 0, 0, 0);
+ if (ret)
+ return ret;
+
+ ccp->firmware_ver[0] = ccp->buffer[1];
+ ccp->firmware_ver[1] = ccp->buffer[2];
+ ccp->firmware_ver[2] = ccp->buffer[3];
+
+ ret = send_usb_cmd(ccp, CTL_GET_BL_VER, 0, 0, 0);
+ if (ret)
+ return ret;
+
+ ccp->bootloader_ver[0] = ccp->buffer[1];
+ ccp->bootloader_ver[1] = ccp->buffer[2];
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+static int firmware_show(struct seq_file *seqf, void *unused)
+{
+ struct ccp_device *ccp = seqf->private;
+
+ seq_printf(seqf, "%d.%d.%d\n",
+ ccp->firmware_ver[0],
+ ccp->firmware_ver[1],
+ ccp->firmware_ver[2]);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(firmware);
+
+static int bootloader_show(struct seq_file *seqf, void *unused)
+{
+ struct ccp_device *ccp = seqf->private;
+
+ seq_printf(seqf, "%d.%d\n",
+ ccp->bootloader_ver[0],
+ ccp->bootloader_ver[1]);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(bootloader);
+
+static void ccp_debugfs_init(struct ccp_device *ccp)
+{
+ ccp->debugfs = debugfs_create_dir("corsaircpro", NULL);
+ debugfs_create_file("firmware_version", 0444, ccp->debugfs, ccp, &firmware_fops);
+ debugfs_create_file("bootloader_version", 0444, ccp->debugfs, ccp, &bootloader_fops);
+}
+
+#else
+
+static void ccp_debugfs_init(struct ccp_device *ccp)
+{
+}
+
+#endif
+
static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct ccp_device *ccp;
@@ -542,6 +614,13 @@ static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id)
ret = get_fan_cnct(ccp);
if (ret)
goto out_hw_close;
+
+ ret = get_fw_version(ccp);
+ if (ret)
+ goto out_hw_close;
+
+ ccp_debugfs_init(ccp);
+
ccp->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsaircpro",
ccp, &ccp_chip_info, NULL);
if (IS_ERR(ccp->hwmon_dev)) {
@@ -562,6 +641,7 @@ static void ccp_remove(struct hid_device *hdev)
{
struct ccp_device *ccp = hid_get_drvdata(hdev);
+ debugfs_remove_recursive(ccp->debugfs);
hwmon_device_unregister(ccp->hwmon_dev);
hid_hw_close(hdev);
hid_hw_stop(hdev);
--
2.45.0
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