From patchwork Wed Jun 29 23:32:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashant Malani X-Patchwork-Id: 12900856 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) (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 EAB6D6D17 for ; Wed, 29 Jun 2022 23:36:34 +0000 (UTC) Received: by mail-pj1-f49.google.com with SMTP id i8-20020a17090aee8800b001ecc929d14dso2141249pjz.0 for ; Wed, 29 Jun 2022 16:36:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0+vvOVFfU8uFzQawpdSqHer9f8bP2F/YEZu8I7Rg7Ys=; b=Hsx4uyO6Tu8d1qkUz87tehFJnYFEFwfbLDWpyERC4QzZKwmDRdCaBNJT0XQai56BI2 XOIETp9qqPz0fiJPpbqaSnz5L0ChQCrUP61uGKamb28EkZ/TT/HNlZHEIBP8f/sfhzKb QACpp1wGtG5FUkfqBDsnsTkWY3sLEjSLnGUn8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0+vvOVFfU8uFzQawpdSqHer9f8bP2F/YEZu8I7Rg7Ys=; b=MvBs1XfkEezf+wEN/0XTRDXwOeK+CaOIlwcorIA2SlOXRldkbC7tSqd+3j02/gZHcw wCpgoutdkvFlvcnh9+OvPmZfNE2Txnzw3sExF3OaSxlZ8gDcKN5Rf5llcyUjpLrES+nH DLQSdhoS6lLWfzm+5pWz10IrsiEFBLWtb7FHd5dutA+qHJfl5k0XqMZdf/QExcFyrvQ/ TwX8XMQLVSBP1uudRbsjXRtG6bQohYRw+ShWqYC/lZAmOVzhprc6ggv+h3b97Q/7QkaX G879xTX26J6W25KUTn0D6hmddWYdw/s/7u+n52veDis+DRpfCVh6UvsYxRXpaM3VpCRu f0QQ== X-Gm-Message-State: AJIora8S81DHIhX7thNx5jbo8SDhbel6xdhY2VwZpERHx0APTVBh2C7f 2b/FWswrvaNZEw2bZGUhPdD0Sw== X-Google-Smtp-Source: AGRyM1tMl81u3qj7l08Q5QHb4umX3T3yLJEnR7ouqJeY+P4T3j1/UV6EFuqv1Gvm5cQoy0RILlPVXg== X-Received: by 2002:a17:902:d583:b0:16a:29de:9dfb with SMTP id k3-20020a170902d58300b0016a29de9dfbmr11374975plh.44.1656545794430; Wed, 29 Jun 2022 16:36:34 -0700 (PDT) Received: from pmalani.c.googlers.com.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id rm1-20020a17090b3ec100b001ed27d132c1sm127305pjb.2.2022.06.29.16.36.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jun 2022 16:36:33 -0700 (PDT) From: Prashant Malani To: linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, chrome-platform@lists.linux.dev Cc: bleung@chromium.org, heikki.krogerus@linux.intel.com, Prashant Malani , Daisuke Nojiri , "Dustin L. Howett" , Greg Kroah-Hartman , Guenter Roeck , "Gustavo A. R. Silva" , Kees Cook , Sebastian Reichel , Tzung-Bi Shih Subject: [PATCH 5/9] platform/chrome: cros_typec_switch: Set EC retimer Date: Wed, 29 Jun 2022 23:32:23 +0000 Message-Id: <20220629233314.3540377-6-pmalani@chromium.org> X-Mailer: git-send-email 2.37.0.rc0.161.g10f37bed90-goog In-Reply-To: <20220629233314.3540377-1-pmalani@chromium.org> References: <20220629233314.3540377-1-pmalani@chromium.org> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Invoke Chrome EC host commands to set EC-controlled retimer switches to the state the Type-C framework instructs. Signed-off-by: Prashant Malani --- drivers/platform/chrome/cros_typec_switch.c | 56 ++++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-) diff --git a/drivers/platform/chrome/cros_typec_switch.c b/drivers/platform/chrome/cros_typec_switch.c index 1a795f613543..9faa442dd81a 100644 --- a/drivers/platform/chrome/cros_typec_switch.c +++ b/drivers/platform/chrome/cros_typec_switch.c @@ -9,7 +9,10 @@ #include #include #include +#include #include +#include +#include #include #define DRV_NAME "cros-typec-switch" @@ -28,10 +31,61 @@ struct cros_typec_switch_data { struct cros_typec_port *ports[EC_USB_PD_MAX_PORTS]; }; +static int cros_typec_cmd_mux_set(struct cros_typec_switch_data *sdata, int port_num, u8 index, + u8 state) +{ + struct typec_usb_mux_set params = { + .mux_index = index, + .mux_flags = state, + }; + + struct ec_params_typec_control req = { + .port = port_num, + .command = TYPEC_CONTROL_COMMAND_USB_MUX_SET, + .mux_params = params, + }; + + return cros_ec_command(sdata->ec, 0, EC_CMD_TYPEC_CONTROL, &req, + sizeof(req), NULL, 0); +} + +static int cros_typec_get_mux_state(unsigned long mode, struct typec_altmode *alt) +{ + int ret = -EOPNOTSUPP; + + if (mode == TYPEC_STATE_SAFE) + ret = USB_PD_MUX_SAFE_MODE; + else if (mode == TYPEC_STATE_USB) + ret = USB_PD_MUX_USB_ENABLED; + else if (alt && alt->svid == USB_TYPEC_DP_SID) + ret = USB_PD_MUX_DP_ENABLED; + + return ret; +} + +/* + * The Chrome EC treats both mode-switches and retimers as "muxes" for the purposes of the + * host command API. This common function configures and verifies the retimer/mode-switch + * according to the provided setting. + */ +static int cros_typec_configure_mux(struct cros_typec_switch_data *sdata, int port_num, int index, + unsigned long mode, struct typec_altmode *alt) +{ + int ret = cros_typec_get_mux_state(mode, alt); + + if (ret < 0) + return ret; + + return cros_typec_cmd_mux_set(sdata, port_num, index, (u8)ret); +} + static int cros_typec_retimer_set(struct typec_retimer *retimer, struct typec_retimer_state *state) { - return 0; + struct cros_typec_port *port = typec_retimer_get_drvdata(retimer); + + /* Retimers have index 1. */ + return cros_typec_configure_mux(port->sdata, port->port_num, 1, state->mode, state->alt); } void cros_typec_unregister_switches(struct cros_typec_switch_data *sdata)