[PATCH 1/6] skeleton for asetek gen 6 driver

* [PATCH 1/6] skeleton for asetek gen 6 driver
@ 2020-07-13 19:32 jaap aarts
  2020-07-13 19:32 ` [PATCH 2/6] fan support " jaap aarts
                   ` (7 more replies)
  0 siblings, 8 replies; 12+ messages in thread
From: jaap aarts @ 2020-07-13 19:32 UTC (permalink / raw)
  To: Jean Delvare, Guenter Roeck, linux-hwmon, linux-usb
  Cc: jaap aarts, Jaap Aarts

Signed-off-by: Jaap Aarts <jaap.aarts1@example.com>
---
 drivers/hwmon/Kconfig       |   6 ++
 drivers/hwmon/Makefile      |   1 +
 drivers/hwmon/asetek_gen6.c | 186 ++++++++++++++++++++++++++++++++++++
 3 files changed, 193 insertions(+)
 create mode 100644 drivers/hwmon/asetek_gen6.c

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 288ae9f63588..521a9e0c88ca 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -378,6 +378,12 @@ config SENSORS_ARM_SCPI
 	  and power sensors available on ARM Ltd's SCP based platforms. The
 	  actual number and type of sensors exported depend on the platform.
 
+config SENSORS_ASETEK_GEN6
+	tristate "Asetek generation 6 driver"
+	help
+	  If you say yes here you get support for asetek generation 6 boards
+	  found on most AIO liquid coolers with an asetek pump.
+
 config SENSORS_ASB100
 	tristate "Asus ASB100 Bach"
 	depends on X86 && I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 3e32c21f5efe..9683d2aae2b2 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_SENSORS_W83793)	+= w83793.o
 obj-$(CONFIG_SENSORS_W83795)	+= w83795.o
 obj-$(CONFIG_SENSORS_W83781D)	+= w83781d.o
 obj-$(CONFIG_SENSORS_W83791D)	+= w83791d.o
+obj-$(CONFIG_SENSORS_ASETEK_GEN6)	+= asetek_gen6.o
 
 obj-$(CONFIG_SENSORS_AB8500)	+= abx500.o ab8500.o
 obj-$(CONFIG_SENSORS_ABITUGURU)	+= abituguru.o
diff --git a/drivers/hwmon/asetek_gen6.c b/drivers/hwmon/asetek_gen6.c
new file mode 100644
index 000000000000..4d530a4cb71d
--- /dev/null
+++ b/drivers/hwmon/asetek_gen6.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* 
+ * A hwmon driver for most asetek gen 6 all-in-one liquid coolers.
+ * Copyright (c) Jaap Aarts 2020
+ * 
+ * Protocol reverse engineered by audiohacked
+ * https://github.com/audiohacked/OpenCorsairLink
+ */
+
+/*
+ * Supports following chips: 
+ * driver h100i platinum
+ * 
+ * Other products should work with this driver but no testing has been done.
+ * 
+ * Note: platinum is the codename name for pro within driver
+ * 
+ * Note: fan curve controll has not been implemented
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/errno.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+struct driver {
+	struct usb_device *udev;
+
+	char *bulk_out_buffer;
+	char *bulk_in_buffer;
+	size_t bulk_out_size;
+	size_t bulk_in_size;
+	char bulk_in_endpointAddr;
+	char bulk_out_endpointAddr;
+
+	struct usb_interface *interface; /* the interface for this device */
+	struct mutex io_mutex; /* synchronize I/O with disconnect */
+	struct semaphore
+		limit_sem; /* limiting the number of writes in progress */
+
+	struct kref kref;
+};
+
+/* devices that work with this driver */
+static const struct usb_device_id astk_table[] = {
+	{ USB_DEVICE(0x1b1c, 0x0c15) },
+	{} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, astk_table);
+
+int init_device(struct usb_device *udev)
+{
+	int retval;
+	retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x40,
+				 0xffff, 0x0000, 0, 0, 0);
+	//this always returns error
+	if (retval != 0)
+		;
+
+	retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x02, 0x40,
+				 0x0002, 0x0000, 0, 0, 0);
+	if (retval != 0)
+		return retval;
+
+	return 0;
+}
+int deinit_device(struct usb_device *udev)
+{
+	int retval;
+	retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x02, 0x40,
+				 0x0004, 0x0000, 0, 0, 0);
+	if (retval != 0)
+		return retval;
+
+	return 0;
+}
+
+static void astk_delete(struct kref *kref)
+{
+	struct driver *dev = container_of(kref, struct driver, kref);
+
+	usb_put_intf(dev->interface);
+	usb_put_dev(dev->udev);
+	kfree(dev->bulk_in_buffer);
+	kfree(dev->bulk_out_buffer);
+	kfree(dev);
+}
+
+static int astk_probe(struct usb_interface *interface,
+		      const struct usb_device_id *id)
+{
+	struct driver *dev;
+	int retval = 0;
+	struct usb_endpoint_descriptor *bulk_in, *bulk_out;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		retval = -ENOMEM;
+		goto exit;
+	}
+
+	retval = usb_find_common_endpoints(interface->cur_altsetting, &bulk_in,
+					   &bulk_out, NULL, NULL);
+	if (retval != 0)
+		goto exit;
+
+	dev->udev = usb_get_dev(interface_to_usbdev(interface));
+	dev->interface = usb_get_intf(interface);
+
+	/* set up the endpoint information */
+	/* use only the first bulk-in and bulk-out endpoints */
+	dev->bulk_in_size = usb_endpoint_maxp(bulk_in);
+	dev->bulk_in_buffer = kmalloc(dev->bulk_in_size, GFP_KERNEL);
+	dev->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
+	dev->bulk_out_size = usb_endpoint_maxp(bulk_out);
+	dev->bulk_out_buffer = kmalloc(dev->bulk_out_size, GFP_KERNEL);
+	dev->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
+
+	//hwmon_init(dev);
+	retval = init_device(dev->udev);
+	if (retval) {
+		dev_err(&interface->dev, "Failled initialising this device.\n");
+		goto exit;
+	}
+
+	usb_set_intfdata(interface, dev);
+	kref_init(&dev->kref);
+	mutex_init(&dev->io_mutex);
+	sema_init(&dev->limit_sem, 8);
+exit:
+	return retval;
+}
+
+static void astk_disconnect(struct usb_interface *interface)
+{
+	struct driver *dev = usb_get_intfdata(interface);
+	//hwmon_deinit(dev);
+	usb_set_intfdata(interface, NULL);
+	kref_put(&dev->kref, astk_delete);
+	deinit_device(dev->udev);
+	/* let the user know what node this device is now attached to */
+}
+static int astk_resume(struct usb_interface *intf)
+{
+	return 0;
+}
+
+static int astk_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	return 0;
+}
+
+static struct usb_driver astk_driver = {
+	.name = "Asetek gen6 driver",
+	.id_table = astk_table,
+	.probe = astk_probe,
+	.disconnect = astk_disconnect,
+	.resume = astk_resume,
+	.suspend = astk_suspend,
+	.supports_autosuspend = 1,
+};
+
+static int __init astk_init(void)
+{
+	int ret = -1;
+	ret = usb_register(&astk_driver);
+
+	return ret;
+}
+
+static void __exit astk_exit(void)
+{
+	usb_deregister(&astk_driver);
+}
+
+module_init(astk_init);
+module_exit(astk_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaap Aarts <jaap.aarts1@gmail.com>");
+MODULE_DESCRIPTION("Asetek gen6 driver");
-- 
2.27.0


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