From patchwork Sat Nov 4 11:17:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 740979 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5810FC4167B for ; Sat, 4 Nov 2023 11:18:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232017AbjKDLSr (ORCPT ); Sat, 4 Nov 2023 07:18:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231956AbjKDLSq (ORCPT ); Sat, 4 Nov 2023 07:18:46 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4EA91BD for ; Sat, 4 Nov 2023 04:17:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699096675; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zk4l95jEHoH1JCWxauxXu/AiDVZKo7MG3MMmwMuKEUU=; b=KRSsphIEfHpfBKn8B7rm8Kp4pyjLO6oY2xX6KdSz+Pzq9+lqGOQqNeRZx4WmeDC8e44PnK pc0TlKKna8bFgGuUC07cgZ3rO6FkNPYV1FLZKleIrrSKVzPUHeeNqlXJ6vD8KWoB1anVdr O4pK2fpSDn+3UcNbOmckJ5PX2WgcdeY= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-567-ZgVZI_fFN86CVJvdtGJzNw-1; Sat, 04 Nov 2023 07:17:48 -0400 X-MC-Unique: ZgVZI_fFN86CVJvdtGJzNw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 1F1AE811E7D; Sat, 4 Nov 2023 11:17:48 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.2]) by smtp.corp.redhat.com (Postfix) with ESMTP id 71096502E; Sat, 4 Nov 2023 11:17:46 +0000 (UTC) From: Hans de Goede To: Jiri Kosina , Benjamin Tissoires Cc: Hans de Goede , Douglas Anderson , Julian Sax , ahormann@gmx.net, Bruno Jesus , Dietrich , kloxdami@yahoo.com, Tim Aldridge , Rene Wagner , Federico Ricchiuto , linux-input@vger.kernel.org Subject: [PATCH 1/7] HID: i2c-hid: Fold i2c_hid_execute_reset() into i2c_hid_hwreset() Date: Sat, 4 Nov 2023 12:17:37 +0100 Message-ID: <20231104111743.14668-2-hdegoede@redhat.com> In-Reply-To: <20231104111743.14668-1-hdegoede@redhat.com> References: <20231104111743.14668-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org i2c_hid_hwreset() is the only caller of i2c_hid_execute_reset(), fold the latter into the former. This is a preparation patch for removing the need for I2C_HID_QUIRK_NO_IRQ_AFTER_RESET by making i2c-hid behave more like Windows. No functional changes intended. Signed-off-by: Hans de Goede Reviewed-by: Douglas Anderson --- drivers/hid/i2c-hid/i2c-hid-core.c | 80 +++++++++++++----------------- 1 file changed, 34 insertions(+), 46 deletions(-) diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index 2735cd585af0..12a9edb23f82 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -426,49 +426,9 @@ static int i2c_hid_set_power(struct i2c_hid *ihid, int power_state) return ret; } -static int i2c_hid_execute_reset(struct i2c_hid *ihid) -{ - size_t length = 0; - int ret; - - i2c_hid_dbg(ihid, "resetting...\n"); - - /* Prepare reset command. Command register goes first. */ - *(__le16 *)ihid->cmdbuf = ihid->hdesc.wCommandRegister; - length += sizeof(__le16); - /* Next is RESET command itself */ - length += i2c_hid_encode_command(ihid->cmdbuf + length, - I2C_HID_OPCODE_RESET, 0, 0); - - set_bit(I2C_HID_RESET_PENDING, &ihid->flags); - - ret = i2c_hid_xfer(ihid, ihid->cmdbuf, length, NULL, 0); - if (ret) { - dev_err(&ihid->client->dev, "failed to reset device.\n"); - goto out; - } - - if (ihid->quirks & I2C_HID_QUIRK_NO_IRQ_AFTER_RESET) { - msleep(100); - goto out; - } - - i2c_hid_dbg(ihid, "%s: waiting...\n", __func__); - if (!wait_event_timeout(ihid->wait, - !test_bit(I2C_HID_RESET_PENDING, &ihid->flags), - msecs_to_jiffies(5000))) { - ret = -ENODATA; - goto out; - } - i2c_hid_dbg(ihid, "%s: finished.\n", __func__); - -out: - clear_bit(I2C_HID_RESET_PENDING, &ihid->flags); - return ret; -} - static int i2c_hid_hwreset(struct i2c_hid *ihid) { + size_t length = 0; int ret; i2c_hid_dbg(ihid, "%s\n", __func__); @@ -482,21 +442,49 @@ static int i2c_hid_hwreset(struct i2c_hid *ihid) ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON); if (ret) - goto out_unlock; + goto err_unlock; - ret = i2c_hid_execute_reset(ihid); + /* Prepare reset command. Command register goes first. */ + *(__le16 *)ihid->cmdbuf = ihid->hdesc.wCommandRegister; + length += sizeof(__le16); + /* Next is RESET command itself */ + length += i2c_hid_encode_command(ihid->cmdbuf + length, + I2C_HID_OPCODE_RESET, 0, 0); + + set_bit(I2C_HID_RESET_PENDING, &ihid->flags); + + ret = i2c_hid_xfer(ihid, ihid->cmdbuf, length, NULL, 0); if (ret) { dev_err(&ihid->client->dev, "failed to reset device: %d\n", ret); - i2c_hid_set_power(ihid, I2C_HID_PWR_SLEEP); - goto out_unlock; + goto err_clear_reset; } + if (ihid->quirks & I2C_HID_QUIRK_NO_IRQ_AFTER_RESET) { + msleep(100); + clear_bit(I2C_HID_RESET_PENDING, &ihid->flags); + } + + i2c_hid_dbg(ihid, "%s: waiting...\n", __func__); + if (!wait_event_timeout(ihid->wait, + !test_bit(I2C_HID_RESET_PENDING, &ihid->flags), + msecs_to_jiffies(5000))) { + ret = -ENODATA; + goto err_clear_reset; + } + i2c_hid_dbg(ihid, "%s: finished.\n", __func__); + /* At least some SIS devices need this after reset */ if (!(ihid->quirks & I2C_HID_QUIRK_NO_WAKEUP_AFTER_RESET)) ret = i2c_hid_set_power(ihid, I2C_HID_PWR_ON); -out_unlock: + mutex_unlock(&ihid->reset_lock); + return ret; + +err_clear_reset: + clear_bit(I2C_HID_RESET_PENDING, &ihid->flags); + i2c_hid_set_power(ihid, I2C_HID_PWR_SLEEP); +err_unlock: mutex_unlock(&ihid->reset_lock); return ret; }