From patchwork Thu Nov 7 11:43:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Facklam via B4 Relay X-Patchwork-Id: 13866248 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2BC6A20C483; Thu, 7 Nov 2024 11:44:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730979841; cv=none; b=IgK6VlC0awT6P4bU/Zq6sVEE/kZ7IjpGUL09dREW1QtuxMuYR15pigKAjA8wxebma7BxrA+1AYhr652GgcKjpH8IF/VVwKiqMsj91teOnqZGqOHODezrBbmmPbWBMVzkQSWlDRAHAdpUxM7HabcvMMe3OKxmQ0qIR7qDB6Zs7HU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730979841; c=relaxed/simple; bh=fTI5NBtzq4sCe/T7b4tutmnNVDOvNEZ2tE3VYZgBZFY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=En/qTOLASIuP4x+P65u6id4TjN72AUyK+ZHc8+IMfKAAhiQiV806pfZ/R2KJAhncKEENH+IRJrallusw5XFC4OlvUdKVIw96PdFYYMwYJcQfL2UGvRHa71Zk+PtFLp92IrpRTu/cJzl6xkknOQCAnJ+Ku4wKh2iXn4P3mIOhXD0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=P5ynFb66; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="P5ynFb66" Received: by smtp.kernel.org (Postfix) with ESMTPS id AB8E2C4CED4; Thu, 7 Nov 2024 11:44:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730979840; bh=fTI5NBtzq4sCe/T7b4tutmnNVDOvNEZ2tE3VYZgBZFY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=P5ynFb66EQuAWFoim3WlXgtAsvCw8HVStoze3lsy5OZnhVu7IXeD+7/lheztZwE97 Qns2xVcZxFjG7kkc+REjgLE4BofNMOpMomZqj0WqbapVHoDLrAiuhYfLctyN5F69mX V3uUB0+P++AT+2hJy5Yqn/3G43AyhwJbTypOfITdWd2A6C9YJA3nd/aGk5nLiz8xfi 9WOTY39XaiqPjIof3oUg524Iu6dgDCzaB1wYC8MFrGuHPlsxo3u0RLEl1KouvEqnT5 fzetJ6mrYn0uNMbXaj9DdyPTRE5WMjivQOWbuPja/xg2N+U0sI/VcveDfXQupv6hGS BJEIh9PUqsrhw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id A03FAD43354; Thu, 7 Nov 2024 11:44:00 +0000 (UTC) From: Oliver Facklam via B4 Relay Date: Thu, 07 Nov 2024 12:43:29 +0100 Subject: [PATCH 3/4] usb: typec: hd3ss3220: support configuring port type Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241107-usb-typec-controller-enhancements-v1-3-3886c1acced2@zuehlke.com> References: <20241107-usb-typec-controller-enhancements-v1-0-3886c1acced2@zuehlke.com> In-Reply-To: <20241107-usb-typec-controller-enhancements-v1-0-3886c1acced2@zuehlke.com> To: Heikki Krogerus , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Oliver Facklam , Benedict von Heyl , Mathis Foerst , Michael Glettig X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1730979838; l=4521; i=oliver.facklam@zuehlke.com; s=20241107; h=from:subject:message-id; bh=RoJ3L9O4AN+n7NPifu/hwf1btjsUL9d+mOMPJO0VD04=; b=ROIfT6svIEQiIdOfNTksvubjgWdQrobqW8MYz+gm2mXTODPw8LFK8qmdrsJ8mjcv9XX3bbggo HcusLZntEMlDVlBIo2t16wQDaJUzN87QucIyWbvTpwedAMtSzG7t/qH X-Developer-Key: i=oliver.facklam@zuehlke.com; a=ed25519; pk=bMlB+nko+ewJHQJLwq2t26VDbmRmNDPr/1woleqp7Lw= X-Endpoint-Received: by B4 Relay for oliver.facklam@zuehlke.com/20241107 with auth_id=271 X-Original-From: Oliver Facklam Reply-To: oliver.facklam@zuehlke.com From: Oliver Facklam The TI HD3SS3220 Type-C controller supports configuring the port type it will operate as through the MODE_SELECT field of the General Control Register. Configure the port type based on the fwnode property "power-role" during probe, and through the port_type_set typec_operation. The MODE_SELECT field can only be changed when the controller is in unattached state, so follow the sequence recommended by the datasheet to: 1. disable termination on CC pins to disable the controller 2. change the mode 3. re-enable termination This will effectively cause a connected device to disconnect for the duration of the mode change. Signed-off-by: Oliver Facklam --- drivers/usb/typec/hd3ss3220.c | 66 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 65 insertions(+), 1 deletion(-) diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c index e6e4b1871b5d805f8c367131509f4e6ec0d2b5f0..357c4e9491a2e3047046db91858ac98ab484ef62 100644 --- a/drivers/usb/typec/hd3ss3220.c +++ b/drivers/usb/typec/hd3ss3220.c @@ -35,10 +35,16 @@ #define HD3SS3220_REG_CN_STAT_CTRL_INT_STATUS BIT(4) /* Register HD3SS3220_REG_GEN_CTRL*/ +#define HD3SS3220_REG_GEN_CTRL_DISABLE_TERM BIT(0) #define HD3SS3220_REG_GEN_CTRL_SRC_PREF_MASK (BIT(2) | BIT(1)) #define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_DEFAULT 0x00 #define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SNK BIT(1) #define HD3SS3220_REG_GEN_CTRL_SRC_PREF_DRP_TRY_SRC (BIT(2) | BIT(1)) +#define HD3SS3220_REG_GEN_CTRL_MODE_SELECT_MASK (BIT(5) | BIT(4)) +#define HD3SS3220_REG_GEN_CTRL_MODE_SELECT_DEFAULT 0x00 +#define HD3SS3220_REG_GEN_CTRL_MODE_SELECT_DFP BIT(5) +#define HD3SS3220_REG_GEN_CTRL_MODE_SELECT_UFP BIT(4) +#define HD3SS3220_REG_GEN_CTRL_MODE_SELECT_DRP (BIT(5) | BIT(4)) struct hd3ss3220 { struct device *dev; @@ -75,6 +81,52 @@ static int hd3ss3220_set_power_opmode(struct hd3ss3220 *hd3ss3220, int power_opm current_mode); } +static int hd3ss3220_set_port_type(struct hd3ss3220 *hd3ss3220, int type) +{ + int mode_select, err; + + switch (type) { + case TYPEC_PORT_SRC: + mode_select = HD3SS3220_REG_GEN_CTRL_MODE_SELECT_DFP; + break; + case TYPEC_PORT_SNK: + mode_select = HD3SS3220_REG_GEN_CTRL_MODE_SELECT_UFP; + break; + case TYPEC_PORT_DRP: + mode_select = HD3SS3220_REG_GEN_CTRL_MODE_SELECT_DRP; + break; + default: + dev_err(hd3ss3220->dev, "bad port type: %d\n", type); + return -EINVAL; + } + + /* Disable termination before changing MODE_SELECT as required by datasheet */ + err = regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, + HD3SS3220_REG_GEN_CTRL_DISABLE_TERM, + HD3SS3220_REG_GEN_CTRL_DISABLE_TERM); + if (err < 0) { + dev_err(hd3ss3220->dev, "Failed to disable port for mode change: %d\n", err); + return err; + } + + err = regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, + HD3SS3220_REG_GEN_CTRL_MODE_SELECT_MASK, + mode_select); + if (err < 0) { + dev_err(hd3ss3220->dev, "Failed to change mode: %d\n", err); + regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, + HD3SS3220_REG_GEN_CTRL_DISABLE_TERM, 0); + return err; + } + + err = regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, + HD3SS3220_REG_GEN_CTRL_DISABLE_TERM, 0); + if (err < 0) + dev_err(hd3ss3220->dev, "Failed to re-enable port after mode change: %d\n", err); + + return err; +} + static int hd3ss3220_set_source_pref(struct hd3ss3220 *hd3ss3220, int src_pref) { return regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL, @@ -131,8 +183,16 @@ static int hd3ss3220_dr_set(struct typec_port *port, enum typec_data_role role) return ret; } +static int hd3ss3220_port_type_set(struct typec_port *port, enum typec_port_type type) +{ + struct hd3ss3220 *hd3ss3220 = typec_get_drvdata(port); + + return hd3ss3220_set_port_type(hd3ss3220, type); +} + static const struct typec_operations hd3ss3220_ops = { - .dr_set = hd3ss3220_dr_set + .dr_set = hd3ss3220_dr_set, + .port_type_set = hd3ss3220_port_type_set, }; static void hd3ss3220_set_role(struct hd3ss3220 *hd3ss3220) @@ -263,6 +323,10 @@ static int hd3ss3220_probe(struct i2c_client *client) if (ret) goto err_put_role; + ret = hd3ss3220_set_port_type(hd3ss3220, typec_cap.type); + if (ret < 0) + goto err_put_role; + typec_cap.driver_data = hd3ss3220; typec_cap.ops = &hd3ss3220_ops;