From patchwork Sat Dec 2 22:46:08 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: 749653 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="KYH1Py/3" 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 45F9BA4 for ; Sat, 2 Dec 2023 14:46:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701557184; 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=doS7qrM7XkdcqwLR81e8dlLCF0RheqcFKJXx9jkLw9M=; b=KYH1Py/3frivMklt4cMa4dSqOc4FiqV8Lz8/3XjlpC9NsHJX5bLMgK2ZC3kwB+scLm/4Dj 04LbYtJmrJFg5G7tC2JzeIlgBF4pjW0zfPDVxnhWojVCiP6Inm+bnIoZJLpQE3llQq9TZH 9AACN78mGSIZXXBdl/7R1ncMelIhimQ= 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-383-9U7nM74SOC2Te5suSz2kDw-1; Sat, 02 Dec 2023 17:46:20 -0500 X-MC-Unique: 9U7nM74SOC2Te5suSz2kDw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (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 B17A8101A52D; Sat, 2 Dec 2023 22:46:19 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id 108262166B26; Sat, 2 Dec 2023 22:46:17 +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 v3 1/7] HID: i2c-hid: Fold i2c_hid_execute_reset() into i2c_hid_hwreset() Date: Sat, 2 Dec 2023 23:46:08 +0100 Message-ID: <20231202224615.24818-2-hdegoede@redhat.com> In-Reply-To: <20231202224615.24818-1-hdegoede@redhat.com> References: <20231202224615.24818-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.6 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. Reviewed-by: Douglas Anderson Signed-off-by: Hans de Goede --- Changes in v3: - Use "else if" to only wait for reset timeout when the I2C_HID_QUIRK_NO_IRQ_AFTER_RESET quirk is not set Changes in v2: - Move the i2c_hid_dbg(... "%s: waiting...\n" ...) to above the msleep(100) for the I2C_HID_QUIRK_NO_IRQ_AFTER_RESET quirk --- drivers/hid/i2c-hid/i2c-hid-core.c | 79 +++++++++++++----------------- 1 file changed, 33 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..ca2a4ccb9abf 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 +442,48 @@ 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; } + i2c_hid_dbg(ihid, "%s: waiting...\n", __func__); + + if (ihid->quirks & I2C_HID_QUIRK_NO_IRQ_AFTER_RESET) { + msleep(100); + clear_bit(I2C_HID_RESET_PENDING, &ihid->flags); + } else 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; }