From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl1-f51.google.com (mail-dl1-f51.google.com [74.125.82.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 218CD2E03F1 for ; Wed, 20 May 2026 01:32:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779240728; cv=none; b=I/Oyo43ZP89LRkrkgC38+OtfiizTnTdh+C4rknhPp+YPznAiyGCn8gJdyg6jXFD8IOv7swETXpKgAN9fJ4cQq3hvi6Sp88GODoS8uapNC+6lEND69meiX4pk8mkUPFRpDWkzCiNsNnDE4RknH/FoHe6+N7TPcMWkCp1oWb4DgaQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779240728; c=relaxed/simple; bh=HdeuTnxxt77Ua1vh0EJv9AkEgWjyTUJwdgKCHg2puX8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P9J5/lXASIAyjJSNG8xVUm6zR9AuN3pokf9AaE51m+zlmQWSyMoKHww216KM8ZQr5kd5cVg67awIqL2UavXfEw9BW5hIaWPElA29ZHKTXdqGrTOieHYUXzFsmfuKbNe+NB35cETy8dQy31xfoO1TdzQfjlmghgj0dXGoHPkwXKo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=JszTecSC; arc=none smtp.client-ip=74.125.82.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="JszTecSC" Received: by mail-dl1-f51.google.com with SMTP id a92af1059eb24-1357c851a48so4368580c88.1 for ; Tue, 19 May 2026 18:32:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779240724; x=1779845524; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+d1X2pD6V8CcZWAg7IlHGMnWr+WWs/SSwKLaQvBowhE=; b=JszTecSCcPFqjPtkJ1mddzdWD7f8fyGI/yp7YSEwBspixta0FUpK1kd/GkczWqQP3v Anhw4DmsfysUzB+u6+XQjkj7KnDGPyqkK+k9cWbdYIMjyKJ0Bt02LPPZuMMn8GBhtPm9 L1m8At4rxtuQoNPeTO9WmxQXHv7mr2CL97j3O7oXf6bHq6fzdSHh3m1fuNyFMDCY45zW RZ9O1LAIfKG6IaMcQBNyamJiOB0bMgwQCPVUAJZvaT16QYz+pHyGyGJvLXPf6g8f9Dek yuS/PNOzYUEnD9ESSAh0ClMfZTz84Nfo0Xr38NPV0p7SJdcjGQrtn50LZrfwQhTAu998 XTqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779240724; x=1779845524; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=+d1X2pD6V8CcZWAg7IlHGMnWr+WWs/SSwKLaQvBowhE=; b=axTQalP4+cak9KAftFkapZ20lXLclZJeSyprx5w4zQGMDaNRJkAppU7HPfGYNqqz7q 2KXStmbk8Q5Dp/D2CY3Q8rekjRNWUaxAKL3iuq88xZtrX6zIBmHtpWLte6bC/IR/PWC4 ZyxfHU8mnN8ZUqHPxC9hiC9agvWgJCmmHtPEDEcQLkg31glW6OzXSe+d4FO8ZffFHYKa 1/frrqQBALjPvEBB5xebVl+GgboprvYPTNcTTyTC/O4wpGr4JwU0tDw0FxdtfJyiMB2/ uw2mdoCAp7w0vLdL2yV+2Dt9+9JbssvWgOUIWA0Rar3gq9aJusNz3X3SHOsrA2xVF8HT jtmw== X-Forwarded-Encrypted: i=1; AFNElJ/vPpdJSrQ4F8EctNZ5YAidpxysu0r3rG7gsyQ5auaWJmu4VqlREPi+94QTViWn910rQZhULBDCjQoicw==@vger.kernel.org X-Gm-Message-State: AOJu0Yw9Ck2s2/OV1POEWPPkXk2ijmBF6UOJ+WXsW9OBCDKmAVBC3OF4 Wdwb3OUqRYIOdfeBFVO+/rqc/CHZbCeII8R8vu8Uta7w+19jziao2OEm X-Gm-Gg: Acq92OEAC1MV/c0PIgmBe2iINqPHt5gO5ODOqt7vxRpcytT2ntkVgXdnx05sexTAZqO XLFFhcTRaOWkAJAt8saWup6AqOJedbKw1W7d8cldPfZB7Qn+lH3TMuvzFpQr+F0jblCwrWmN7cA uExG2gvjL0su1XFXhkURsuPjL2VbrRxufpLpmnwksb1stwflLC3YprZX5YPikmNvv0i6do93FT6 2mv0R/nUSyI66or2xI2Oy6QSJq3J2V7LLBlKrx7S0AAtIJsYSUkYVORbjEVAfzJDWKE7eAj9ebS nGURQwckCItlbcrRSw/zG1L7HZXm8GVy09gn4yyXvj9cbFCs7MU4Qf+wQUh/WU4pMPublSE6bOf f8BdDeRnrl1rJeA1rK3MeRQsXY3a2ZJFVzY/uHHNWH13rsMoNIjc/1/Z+eDdu3UTqaRPbfKH2FO J82NvBIKI8AjrHJT15Q7A57s9OENfl2NoVV6uOUayPmFhJwjMylls2xJv3dGiBgcyxTnawazuBP I6J X-Received: by 2002:a05:7022:31a:b0:128:e693:b61c with SMTP id a92af1059eb24-13504744146mr9128348c88.27.1779240724311; Tue, 19 May 2026 18:32:04 -0700 (PDT) Received: from lappy (108-228-232-20.lightspeed.sndgca.sbcglobal.net. [108.228.232.20]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-134cbdcf140sm25383312c88.5.2026.05.19.18.32.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 May 2026 18:32:04 -0700 (PDT) From: "Derek J. Clark" To: Jiri Kosina , Benjamin Tissoires Cc: "Pierre-Loup A . Griffais" , Denis Benato , Zhouwang Huang , "Derek J . Clark" , linux-input@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 4/4] HID: hid-msi: Add Rumble Intensity Attributes Date: Wed, 20 May 2026 01:31:58 +0000 Message-ID: <20260520013158.3633277-5-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260520013158.3633277-1-derekjohn.clark@gmail.com> References: <20260520013158.3633277-1-derekjohn.clark@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adds intensity adjustment for the left and right rumble motors. Claude was used during the reverse-engineering data gathering for this feature done by Zhouwang Huang. As the code had already been affected, I used Claude to create the initial framing for the feature, then did manual cleanup of the _show and _store functions afterwards to fix bugs and keep the coding style consistent. Claude was also used as an initial reviewer of this patch. Assisted-by: Claude:claude-sonnet-4-6 Co-developed-by: Zhouwang Huang Signed-off-by: Zhouwang Huang Signed-off-by: Derek J. Clark --- v7: - Match on write address for rumble reports to prevent late ACK from causing synchronization errors. - Use spinlock for read/write profile_pending. - Use smp_[store_release|load_acquire] pattern for checking gamepad_registered to avoid possible races during teardown. - Use struct for rumble reports. v6: - Make all timeouts 25ms to ensure at least 2 jiffies in a 100Hz config. - Add spinlock_irqsave for read/write access on rumble_intensity variables. - Gate all attribute show/store functions with gamepad_registered. v5: - Remove mkey related changes. v2: - Use pending_profile and sync to rom mutexes. --- drivers/hid/hid-msi.c | 192 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) diff --git a/drivers/hid/hid-msi.c b/drivers/hid/hid-msi.c index 61917902e38d3..4adc5588618df 100644 --- a/drivers/hid/hid-msi.c +++ b/drivers/hid/hid-msi.c @@ -79,6 +79,8 @@ enum claw_profile_ack_pending { CLAW_M1_PENDING, CLAW_M2_PENDING, CLAW_RGB_PENDING, + CLAW_RUMBLE_LEFT_PENDING, + CLAW_RUMBLE_RIGHT_PENDING, }; enum claw_key_index { @@ -266,6 +268,11 @@ static const u16 button_mapping_addr_new[] = { static const u16 rgb_addr_old = 0x01fa; static const u16 rgb_addr_new = 0x024a; +static const u16 rumble_addr[] = { + 0x0022, /* left */ + 0x0023, /* right */ +}; + struct claw_command_report { u8 report_id; u8 padding[2]; @@ -308,6 +315,12 @@ struct claw_rgb_report { struct rgb_frame zone_data; } __packed; +struct claw_rumble_report { + struct claw_profile_report; + u8 padding; + u8 intensity; +} __packed; + struct claw_drvdata { /* MCU General Variables */ enum claw_profile_ack_pending profile_pending; @@ -331,9 +344,13 @@ struct claw_drvdata { enum claw_gamepad_mode_index gamepad_mode; u8 m1_codes[CLAW_KEYS_MAX]; u8 m2_codes[CLAW_KEYS_MAX]; + u8 rumble_intensity_right; + u8 rumble_intensity_left; bool gamepad_registered; + spinlock_t rumble_lock; /* lock for rumble_intensity read/write */ spinlock_t mode_lock; /* Lock for mode data read/write */ const u16 *bmap_addr; + bool rumble_support; bool bmap_support; /* RGB Variables */ @@ -381,6 +398,7 @@ static int claw_gamepad_mode_event(struct claw_drvdata *drvdata, static int claw_profile_event(struct claw_drvdata *drvdata, struct claw_command_report *cmd_rep) { enum claw_profile_ack_pending profile; + struct claw_rumble_report *rumble; struct claw_mkey_report *mkeys; struct claw_rgb_report *frame; u16 rgb_addr, read_addr; @@ -430,6 +448,20 @@ static int claw_profile_event(struct claw_drvdata *drvdata, struct claw_command_ } break; + case CLAW_RUMBLE_LEFT_PENDING: + rumble = (struct claw_rumble_report *)cmd_rep->data; + if (be16_to_cpu(rumble->read_addr) != rumble_addr[0]) + return -EINVAL; + scoped_guard(spinlock, &drvdata->rumble_lock) + drvdata->rumble_intensity_left = rumble->intensity; + break; + case CLAW_RUMBLE_RIGHT_PENDING: + rumble = (struct claw_rumble_report *)cmd_rep->data; + if (be16_to_cpu(rumble->read_addr) != rumble_addr[1]) + return -EINVAL; + scoped_guard(spinlock, &drvdata->rumble_lock) + drvdata->rumble_intensity_right = rumble->intensity; + break; default: dev_dbg(&drvdata->hdev->dev, "Got profile event without changes pending from command: %x\n", @@ -919,6 +951,154 @@ static ssize_t button_mapping_options_show(struct device *dev, } static DEVICE_ATTR_RO(button_mapping_options); +static ssize_t rumble_intensity_left_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct claw_rumble_report report = { {0x01, cpu_to_be16(rumble_addr[0])}, 0x01 }; + struct hid_device *hdev = to_hid_device(dev); + struct claw_drvdata *drvdata = hid_get_drvdata(hdev); + u8 val; + int ret; + + /* Pairs with smp_store_release from cfg_setup_fn in system_wq context */ + if (!smp_load_acquire(&drvdata->gamepad_registered)) + return -ENODEV; + + ret = kstrtou8(buf, 10, &val); + if (ret) + return ret; + + if (val > 100) + return -EINVAL; + + report.intensity = val; + + guard(mutex)(&drvdata->rom_mutex); + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_WRITE_PROFILE_DATA, + (u8 *)&report, sizeof(report), 25); + if (ret) + return ret; + + /* MCU will not send ACK until the USB transaction completes. ACK is sent + * immediately after and will hit the stale state machine, before the next + * command re-arms the state machine. Timeout 0 ensures no deadlock waiting + * for ACK that ill never come. + */ + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_SYNC_TO_ROM, NULL, 0, 0); + if (ret) + return ret; + + return count; +} + +static ssize_t rumble_intensity_left_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct claw_rumble_report report = { {0x01, cpu_to_be16(rumble_addr[0])}, 0x01 }; + struct hid_device *hdev = to_hid_device(dev); + struct claw_drvdata *drvdata = hid_get_drvdata(hdev); + int ret; + u8 val; + + /* Pairs with smp_store_release from cfg_setup_fn in system_wq context */ + if (!smp_load_acquire(&drvdata->gamepad_registered)) + return -ENODEV; + + guard(mutex)(&drvdata->profile_mutex); + scoped_guard(spinlock_irqsave, &drvdata->profile_lock) + drvdata->profile_pending = CLAW_RUMBLE_LEFT_PENDING; + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_READ_PROFILE, + (u8 *)&report, sizeof(report), 25); + if (ret) + return ret; + + scoped_guard(spinlock_irqsave, &drvdata->rumble_lock) + val = drvdata->rumble_intensity_left; + + return sysfs_emit(buf, "%u\n", val); +} +static DEVICE_ATTR_RW(rumble_intensity_left); + +static ssize_t rumble_intensity_right_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct claw_rumble_report report = { {0x01, cpu_to_be16(rumble_addr[1])}, 0x01 }; + struct hid_device *hdev = to_hid_device(dev); + struct claw_drvdata *drvdata = hid_get_drvdata(hdev); + u8 val; + int ret; + + /* Pairs with smp_store_release from cfg_setup_fn in system_wq context */ + if (!smp_load_acquire(&drvdata->gamepad_registered)) + return -ENODEV; + + ret = kstrtou8(buf, 10, &val); + if (ret) + return ret; + + if (val > 100) + return -EINVAL; + + report.intensity = val; + + guard(mutex)(&drvdata->rom_mutex); + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_WRITE_PROFILE_DATA, + (u8 *)&report, sizeof(report), 25); + if (ret) + return ret; + + /* MCU will not send ACK until the USB transaction completes. ACK is sent + * immediately after and will hit the stale state machine, before the next + * command re-arms the state machine. Timeout 0 ensures no deadlock waiting + * for ACK that ill never come. + */ + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_SYNC_TO_ROM, NULL, 0, 0); + if (ret) + return ret; + + return count; +} + +static ssize_t rumble_intensity_right_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct claw_rumble_report report = { {0x01, cpu_to_be16(rumble_addr[1])}, 0x01 }; + struct hid_device *hdev = to_hid_device(dev); + struct claw_drvdata *drvdata = hid_get_drvdata(hdev); + int ret; + u8 val; + + /* Pairs with smp_store_release from cfg_setup_fn in system_wq context */ + if (!smp_load_acquire(&drvdata->gamepad_registered)) + return -ENODEV; + + guard(mutex)(&drvdata->profile_mutex); + scoped_guard(spinlock_irqsave, &drvdata->profile_lock) + drvdata->profile_pending = CLAW_RUMBLE_RIGHT_PENDING; + ret = claw_hw_output_report(hdev, CLAW_COMMAND_TYPE_READ_PROFILE, + (u8 *)&report, sizeof(report), 25); + if (ret) + return ret; + + scoped_guard(spinlock_irqsave, &drvdata->rumble_lock) + val = drvdata->rumble_intensity_right; + + return sysfs_emit(buf, "%u\n", val); +} +static DEVICE_ATTR_RW(rumble_intensity_right); + +static ssize_t rumble_intensity_range_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sysfs_emit(buf, "0-100\n"); +} +static DEVICE_ATTR_RO(rumble_intensity_range); + static umode_t claw_gamepad_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { @@ -939,6 +1119,12 @@ static umode_t claw_gamepad_attr_is_visible(struct kobject *kobj, struct attribu attr == &dev_attr_reset.attr) return attr->mode; + /* Hide rumble attrs if not supported */ + if (attr == &dev_attr_rumble_intensity_left.attr || + attr == &dev_attr_rumble_intensity_right.attr || + attr == &dev_attr_rumble_intensity_range.attr) + return drvdata->rumble_support ? attr->mode : 0; + /* Hide button mapping attrs if it isn't supported */ return drvdata->bmap_support ? attr->mode : 0; } @@ -952,6 +1138,9 @@ static struct attribute *claw_gamepad_attrs[] = { &dev_attr_mkeys_function.attr, &dev_attr_mkeys_function_index.attr, &dev_attr_reset.attr, + &dev_attr_rumble_intensity_left.attr, + &dev_attr_rumble_intensity_right.attr, + &dev_attr_rumble_intensity_range.attr, NULL, }; @@ -1498,6 +1687,7 @@ static void claw_features_supported(struct claw_drvdata *drvdata) drvdata->bmap_support = true; if (minor >= 0x66) { drvdata->bmap_addr = button_mapping_addr_new; + drvdata->rumble_support = true; drvdata->rgb_addr = rgb_addr_new; } else { drvdata->bmap_addr = button_mapping_addr_old; @@ -1509,6 +1699,7 @@ static void claw_features_supported(struct claw_drvdata *drvdata) if ((major == 0x02 && minor >= 0x17) || major >= 0x03) { drvdata->bmap_support = true; drvdata->bmap_addr = button_mapping_addr_new; + drvdata->rumble_support = true; drvdata->rgb_addr = rgb_addr_new; return; } @@ -1557,6 +1748,7 @@ static int claw_probe(struct hid_device *hdev, u8 ep) spin_lock_init(&drvdata->mode_lock); spin_lock_init(&drvdata->profile_lock); spin_lock_init(&drvdata->frame_lock); + spin_lock_init(&drvdata->rumble_lock); init_completion(&drvdata->send_cmd_complete); INIT_DELAYED_WORK(&drvdata->cfg_resume, &cfg_resume_fn); INIT_DELAYED_WORK(&drvdata->cfg_setup, &cfg_setup_fn); -- 2.53.0