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@@ -0,0 +1,393 @@
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+/*
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+ * HID driver for Steelseries SRW-S1
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+ *
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+ * Copyright (c) 2013 Simon Wood
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+ */
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+
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+/*
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the Free
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+ * Software Foundation; either version 2 of the License, or (at your option)
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+ * any later version.
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+ */
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+
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+#include <linux/device.h>
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+#include <linux/usb.h>
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+#include <linux/hid.h>
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+#include <linux/module.h>
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+
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+#include "usbhid/usbhid.h"
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+#include "hid-ids.h"
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+
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+#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
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+#define SRWS1_NUMBER_LEDS 15
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+struct steelseries_srws1_data {
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+ __u16 led_state;
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+ /* the last element is used for setting all leds simultaneously */
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+ struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
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+};
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+#endif
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+
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+/* Fixed report descriptor for Steelseries SRW-S1 wheel controller
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+ *
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+ * The original descriptor hides the sensitivity and assists dials
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+ * a custom vendor usage page. This inserts a patch to make them
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+ * appear in the 'Generic Desktop' usage.
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+ */
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+
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+static __u8 steelseries_srws1_rdesc_fixed[] = {
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+0x05, 0x01, /* Usage Page (Desktop) */
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+0x09, 0x08, /* Usage (MultiAxis), Changed */
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+0xA1, 0x01, /* Collection (Application), */
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+0xA1, 0x02, /* Collection (Logical), */
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+0x95, 0x01, /* Report Count (1), */
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+0x05, 0x01, /* Changed Usage Page (Desktop), */
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+0x09, 0x30, /* Changed Usage (X), */
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+0x16, 0xF8, 0xF8, /* Logical Minimum (-1800), */
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+0x26, 0x08, 0x07, /* Logical Maximum (1800), */
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+0x65, 0x14, /* Unit (Degrees), */
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+0x55, 0x0F, /* Unit Exponent (15), */
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+0x75, 0x10, /* Report Size (16), */
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+0x81, 0x02, /* Input (Variable), */
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+0x09, 0x31, /* Changed Usage (Y), */
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+0x15, 0x00, /* Logical Minimum (0), */
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+0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
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+0x75, 0x0C, /* Report Size (12), */
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+0x81, 0x02, /* Input (Variable), */
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+0x09, 0x32, /* Changed Usage (Z), */
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+0x15, 0x00, /* Logical Minimum (0), */
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+0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
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+0x75, 0x0C, /* Report Size (12), */
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+0x81, 0x02, /* Input (Variable), */
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+0x05, 0x01, /* Usage Page (Desktop), */
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+0x09, 0x39, /* Usage (Hat Switch), */
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+0x25, 0x07, /* Logical Maximum (7), */
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+0x35, 0x00, /* Physical Minimum (0), */
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+0x46, 0x3B, 0x01, /* Physical Maximum (315), */
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+0x65, 0x14, /* Unit (Degrees), */
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+0x75, 0x04, /* Report Size (4), */
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+0x95, 0x01, /* Report Count (1), */
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+0x81, 0x02, /* Input (Variable), */
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+0x25, 0x01, /* Logical Maximum (1), */
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+0x45, 0x01, /* Physical Maximum (1), */
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+0x65, 0x00, /* Unit, */
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+0x75, 0x01, /* Report Size (1), */
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+0x95, 0x03, /* Report Count (3), */
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+0x81, 0x01, /* Input (Constant), */
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+0x05, 0x09, /* Usage Page (Button), */
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+0x19, 0x01, /* Usage Minimum (01h), */
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+0x29, 0x11, /* Usage Maximum (11h), */
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+0x95, 0x11, /* Report Count (17), */
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+0x81, 0x02, /* Input (Variable), */
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+ /* ---- Dial patch starts here ---- */
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+0x05, 0x01, /* Usage Page (Desktop), */
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+0x09, 0x33, /* Usage (RX), */
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+0x75, 0x04, /* Report Size (4), */
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+0x95, 0x02, /* Report Count (2), */
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+0x15, 0x00, /* Logical Minimum (0), */
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+0x25, 0x0b, /* Logical Maximum (b), */
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+0x81, 0x02, /* Input (Variable), */
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+0x09, 0x35, /* Usage (RZ), */
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+0x75, 0x04, /* Report Size (4), */
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+0x95, 0x01, /* Report Count (1), */
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+0x25, 0x03, /* Logical Maximum (3), */
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+0x81, 0x02, /* Input (Variable), */
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+ /* ---- Dial patch ends here ---- */
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+0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
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+0x09, 0x01, /* Usage (01h), */
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+0x75, 0x04, /* Changed Report Size (4), */
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+0x95, 0x0D, /* Changed Report Count (13), */
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+0x81, 0x02, /* Input (Variable), */
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+0xC0, /* End Collection, */
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+0xA1, 0x02, /* Collection (Logical), */
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+0x09, 0x02, /* Usage (02h), */
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+0x75, 0x08, /* Report Size (8), */
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+0x95, 0x10, /* Report Count (16), */
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+0x91, 0x02, /* Output (Variable), */
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+0xC0, /* End Collection, */
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+0xC0 /* End Collection */
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+};
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+
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+#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
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+static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
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+{
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+ struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
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+ struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
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+ __s32 *value = report->field[0]->value;
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+
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+ value[0] = 0x40;
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+ value[1] = leds & 0xFF;
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+ value[2] = leds >> 8;
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+ value[3] = 0x00;
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+ value[4] = 0x00;
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+ value[5] = 0x00;
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+ value[6] = 0x00;
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+ value[7] = 0x00;
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+ value[8] = 0x00;
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+ value[9] = 0x00;
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+ value[10] = 0x00;
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+ value[11] = 0x00;
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+ value[12] = 0x00;
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+ value[13] = 0x00;
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+ value[14] = 0x00;
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+ value[15] = 0x00;
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+
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+ usbhid_submit_report(hdev, report, USB_DIR_OUT);
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+
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+ /* Note: LED change does not show on device until the device is read/polled */
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+}
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+
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+static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
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+ enum led_brightness value)
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+{
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+ struct device *dev = led_cdev->dev->parent;
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+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
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+ struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
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+
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+ if (!drv_data) {
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+ hid_err(hid, "Device data not found.");
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+ return;
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+ }
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+
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+ if (value == LED_OFF)
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+ drv_data->led_state = 0;
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+ else
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+ drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
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+
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+ steelseries_srws1_set_leds(hid, drv_data->led_state);
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+}
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+
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+static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
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+{
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+ struct device *dev = led_cdev->dev->parent;
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+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
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+ struct steelseries_srws1_data *drv_data;
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+
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+ drv_data = hid_get_drvdata(hid);
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+
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+ if (!drv_data) {
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+ hid_err(hid, "Device data not found.");
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+ return LED_OFF;
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+ }
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+
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+ return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
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+}
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+
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+static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
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+ enum led_brightness value)
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+{
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+ struct device *dev = led_cdev->dev->parent;
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+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
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+ struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
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+ int i, state = 0;
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+
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+ if (!drv_data) {
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+ hid_err(hid, "Device data not found.");
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+ return;
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+ }
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+
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+ for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
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+ if (led_cdev != drv_data->led[i])
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+ continue;
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+
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+ state = (drv_data->led_state >> i) & 1;
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+ if (value == LED_OFF && state) {
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+ drv_data->led_state &= ~(1 << i);
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+ steelseries_srws1_set_leds(hid, drv_data->led_state);
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+ } else if (value != LED_OFF && !state) {
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+ drv_data->led_state |= 1 << i;
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+ steelseries_srws1_set_leds(hid, drv_data->led_state);
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+ }
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+ break;
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+ }
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+}
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+
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+static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
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+{
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+ struct device *dev = led_cdev->dev->parent;
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+ struct hid_device *hid = container_of(dev, struct hid_device, dev);
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+ struct steelseries_srws1_data *drv_data;
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+ int i, value = 0;
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+
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+ drv_data = hid_get_drvdata(hid);
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+
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+ if (!drv_data) {
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+ hid_err(hid, "Device data not found.");
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+ return LED_OFF;
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+ }
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+
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+ for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
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+ if (led_cdev == drv_data->led[i]) {
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+ value = (drv_data->led_state >> i) & 1;
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+ break;
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+ }
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+
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+ return value ? LED_FULL : LED_OFF;
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+}
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+
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+static int steelseries_srws1_probe(struct hid_device *hdev,
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+ const struct hid_device_id *id)
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+{
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+ int ret, i;
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+ struct led_classdev *led;
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+ size_t name_sz;
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+ char *name;
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+
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+ struct steelseries_srws1_data *drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
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+
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+ if (drv_data == NULL) {
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+ hid_err(hdev, "can't alloc SRW-S1 memory\n");
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+ return -ENOMEM;
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+ }
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+
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+ hid_set_drvdata(hdev, drv_data);
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+
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+ ret = hid_parse(hdev);
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+ if (ret) {
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+ hid_err(hdev, "parse failed\n");
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+ goto err_free;
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+ }
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+
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+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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+ if (ret) {
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+ hid_err(hdev, "hw start failed\n");
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+ goto err_free;
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+ }
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+
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+ /* register led subsystem */
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+ drv_data->led_state = 0;
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+ for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
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+ drv_data->led[i] = NULL;
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+
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+ steelseries_srws1_set_leds(hdev, 0);
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+
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+ name_sz = strlen(hdev->uniq) + 16;
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+
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+ /* 'ALL', for setting all LEDs simultaneously */
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+ led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
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+ if (!led) {
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+ hid_err(hdev, "can't allocate memory for LED ALL\n");
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+ goto err_led;
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+ }
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+
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+ name = (void *)(&led[1]);
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+ snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
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+ led->name = name;
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+ led->brightness = 0;
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+ led->max_brightness = 1;
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+ led->brightness_get = steelseries_srws1_led_all_get_brightness;
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+ led->brightness_set = steelseries_srws1_led_all_set_brightness;
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+
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+ drv_data->led[SRWS1_NUMBER_LEDS] = led;
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+ ret = led_classdev_register(&hdev->dev, led);
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+ if (ret)
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+ goto err_led;
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+
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+ /* Each individual LED */
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+ for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
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+ led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
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+ if (!led) {
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+ hid_err(hdev, "can't allocate memory for LED %d\n", i);
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+ goto err_led;
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+ }
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+
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+ name = (void *)(&led[1]);
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+ snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
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+ led->name = name;
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+ led->brightness = 0;
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+ led->max_brightness = 1;
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+ led->brightness_get = steelseries_srws1_led_get_brightness;
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+ led->brightness_set = steelseries_srws1_led_set_brightness;
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+
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+ drv_data->led[i] = led;
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+ ret = led_classdev_register(&hdev->dev, led);
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+
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+ if (ret) {
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+ hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
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+err_led:
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+ /* Deregister all LEDs (if any) */
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+ for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
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+ led = drv_data->led[i];
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+ drv_data->led[i] = NULL;
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+ if (!led)
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+ continue;
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+ led_classdev_unregister(led);
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+ kfree(led);
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+ }
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+ goto out; /* but let the driver continue without LEDs */
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+ }
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+ }
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+out:
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+ return 0;
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+err_free:
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+ kfree(drv_data);
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+ return ret;
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+}
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+
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+static void steelseries_srws1_remove(struct hid_device *hdev)
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+{
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+ int i;
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+ struct led_classdev *led;
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+
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+ struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
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+
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+ if (drv_data) {
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+ /* Deregister LEDs (if any) */
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+ for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
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+ led = drv_data->led[i];
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+ drv_data->led[i] = NULL;
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+ if (!led)
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+ continue;
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+ led_classdev_unregister(led);
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+ kfree(led);
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+ }
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+
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+ }
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+
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+ hid_hw_stop(hdev);
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+ kfree(drv_data);
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+ return;
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+}
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+#endif
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+
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+static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,
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+ unsigned int *rsize)
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+{
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+ if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
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+ && rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
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+ hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
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+ rdesc = steelseries_srws1_rdesc_fixed;
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+ *rsize = sizeof(steelseries_srws1_rdesc_fixed);
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+ }
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+ return rdesc;
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+}
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+
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+static const struct hid_device_id steelseries_srws1_devices[] = {
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+ { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
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+
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+static struct hid_driver steelseries_srws1_driver = {
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+ .name = "steelseries_srws1",
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+ .id_table = steelseries_srws1_devices,
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+#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
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+ .probe = steelseries_srws1_probe,
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+ .remove = steelseries_srws1_remove,
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+#endif
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+ .report_fixup = steelseries_srws1_report_fixup
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+};
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+
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+static int __init steelseries_srws1_init(void)
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+{
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+ return hid_register_driver(&steelseries_srws1_driver);
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+}
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+
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+static void __exit steelseries_srws1_exit(void)
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+{
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+ hid_unregister_driver(&steelseries_srws1_driver);
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+}
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+
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+module_init(steelseries_srws1_init);
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+module_exit(steelseries_srws1_exit);
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+MODULE_LICENSE("GPL");
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Jiri Kosina