From patchwork Thu Nov 14 08:02:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Facklam X-Patchwork-Id: 13874708 Received: from smtp.ps-zuehlke.com (smtp.ps-zuehlke.com [193.135.254.84]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 90BDF1F5858; Thu, 14 Nov 2024 08:10:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.135.254.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731571809; cv=none; b=EWLIOSnJ7EsoNDnndkLZvy7aA4v1wKpmkK+/rFdt7tCjsQ5AF1Wcx29I3gfHkOKEsMBs8ILcZLUC/p+bvEI46ycR0u/ZO1rATCScWUPyG/LUZaJCFE+jN/bEMq0q/mzKvF9thhjZDqjk+DsTS5ViwV4Ox/oBXkxh+6mquGhvCJU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731571809; c=relaxed/simple; bh=uJEtCNxbDrnddnM8ZNno3zfUTeG9sWOhU95ycQbQD+A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hsB1Kg28B4iwJf37BnTOQbPp7r2iMA/7G6ZFfiMbSdIxMwVGz3MoEZY1RB03Em2cuUZOVzgDnblvCIkqPfLLN93RtIvrM0suuoXS055FtDS8cHAwZpCTxIcZXah3C4SdgmAfhw8r8MVFHN1+Pvxbcn4zCLxzLslGwEaJ7qxM2ek= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zuehlke.com; spf=pass smtp.mailfrom=zuehlke.com; arc=none smtp.client-ip=193.135.254.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zuehlke.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zuehlke.com Received: from ZUEN49445. (unknown [10.192.66.22]) by smtp.ps-zuehlke.com (Postfix) with ESMTP id 8121C12A; Thu, 14 Nov 2024 09:02:22 +0100 (CET) From: Oliver Facklam Date: Thu, 14 Nov 2024 09:02:08 +0100 Subject: [PATCH v2 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: <20241114-usb-typec-controller-enhancements-v2-3-362376856aea@zuehlke.com> References: <20241114-usb-typec-controller-enhancements-v2-0-362376856aea@zuehlke.com> In-Reply-To: <20241114-usb-typec-controller-enhancements-v2-0-362376856aea@zuehlke.com> To: Heikki Krogerus , Biju Das , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Benedict von Heyl , Mathis Foerst , Michael Glettig , Oliver Facklam X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1731571341; l=4623; i=oliver.facklam@zuehlke.com; s=20241107; h=from:subject:message-id; bh=uJEtCNxbDrnddnM8ZNno3zfUTeG9sWOhU95ycQbQD+A=; b=NiJu2sCpaqzSnXgpilS8a8TbaucEGD7NY7K1ID2rBfiBIERP8l/UvjVQh0v/LWpwSchxFcqtf B6aHPbz8Lj9DFw+gS+drCwwwWwn3CaAkg94X+pCJ1ieJcflIu0eH9tA X-Developer-Key: i=oliver.facklam@zuehlke.com; a=ed25519; pk=bMlB+nko+ewJHQJLwq2t26VDbmRmNDPr/1woleqp7Lw= 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 e581272bb47de95dee8363a5491f543354fcbbf8..e3e9b1597e3b09b82f0726a01f311fb60b4284da 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) @@ -273,6 +333,10 @@ static int hd3ss3220_probe(struct i2c_client *client) if (ret != 0 && ret != -EINVAL && ret != -ENXIO) goto err_put_role; + ret = hd3ss3220_set_port_type(hd3ss3220, typec_cap.type); + if (ret < 0) + goto err_put_role; + hd3ss3220->port = typec_register_port(&client->dev, &typec_cap); if (IS_ERR(hd3ss3220->port)) { ret = PTR_ERR(hd3ss3220->port);