From patchwork Tue Mar 24 18:28:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 11456191 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C4D571731 for ; Tue, 24 Mar 2020 18:29:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9A787206F6 for ; Tue, 24 Mar 2020 18:29:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Z5B/3JRW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A787206F6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kAIknZ2RVw6gB9CaOcG4KQjgkdNyrtcLcfH5XAGtITo=; b=Z5B/3JRWWCVYHI AsxnYFEFit0NnrRvZDbi0ktp8wUbVrztmKRPQWvfaWSlelJEKdEpJhHItnpicKfR5JhfHFsPt3V3X i29DtdYSOr/cjW/qeoakzXY0b1ApjrrK3MWjX/k0k9SVqGwkq6KT3T3qok969KInPAe0ERZ9bYkP1 P2Jj1QT0QtCfcd0PsSjn4riMP09KNZVuviLm2bcg3Cr78qfIq6gDHHoS1nqPzdEt4gG+i/s66lTFY Dd3vPgItuRBvzgAjWdT4Bvx41u82KONuYDshYftzUZX7pxh76o4PwtPoPt/A4hJT0pZZe9MB6pQlM JwbBVC2fhM1afv00diOw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGoIm-00032a-5v; Tue, 24 Mar 2020 18:29:24 +0000 Received: from mx2.suse.de ([195.135.220.15]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jGoHq-00024W-PL; Tue, 24 Mar 2020 18:28:29 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 3F0CFABE7; Tue, 24 Mar 2020 18:28:23 +0000 (UTC) From: Nicolas Saenz Julienne To: linux-kernel@vger.kernel.org, Nicolas Saenz Julienne , Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com Subject: [PATCH v6 2/4] firmware: raspberrypi: Introduce vl805 init routine Date: Tue, 24 Mar 2020 19:28:10 +0100 Message-Id: <20200324182812.20420-3-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200324182812.20420-1-nsaenzjulienne@suse.de> References: <20200324182812.20420-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200324_112827_110873_06144E1C X-CRM114-Status: GOOD ( 15.67 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [195.135.220.15 listed in wl.mailspike.net] -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [195.135.220.15 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tim.gover@raspberrypi.org, sergei.shtylyov@cogentembedded.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, wahrenst@gmx.net Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be loaded directly from an EEPROM or, if not present, by the SoC's VideCore. The function informs VideCore that VL805 was just reset, or requests for a probe defer. Based on Tim Gover's downstream implementation. Signed-off-by: Nicolas Saenz Julienne Reviewed-by: Florian Fainelli --- Changes since v4: - Inline function definition when RASPBERRYPI_FIRMWARE is not defined Changes since v1: - Move include into .c file and add forward declaration to .h drivers/firmware/raspberrypi.c | 38 ++++++++++++++++++++++ include/soc/bcm2835/raspberrypi-firmware.h | 7 ++++ 2 files changed, 45 insertions(+) diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c index da26a584dca0..cbb495aff6a0 100644 --- a/drivers/firmware/raspberrypi.c +++ b/drivers/firmware/raspberrypi.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf)) @@ -286,6 +287,43 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node) } EXPORT_SYMBOL_GPL(rpi_firmware_get); +/* + * On the Raspberry Pi 4, after a PCI reset, VL805's firmware may either be + * loaded directly from an EEPROM or, if not present, by the SoC's VideCore. + * Inform VideCore that VL805 was just reset, or defer xhci's probe if not yet + * joinable trough the mailbox interface. + */ +int rpi_firmware_init_vl805(struct pci_dev *pdev) +{ + struct device_node *fw_np; + struct rpi_firmware *fw; + u32 dev_addr; + int ret; + + fw_np = of_find_compatible_node(NULL, NULL, + "raspberrypi,bcm2835-firmware"); + if (!fw_np) + return 0; + + fw = rpi_firmware_get(fw_np); + of_node_put(fw_np); + if (!fw) + return -EPROBE_DEFER; + + dev_addr = pdev->bus->number << 20 | PCI_SLOT(pdev->devfn) << 15 | + PCI_FUNC(pdev->devfn) << 12; + + ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET, + &dev_addr, sizeof(dev_addr)); + if (ret) + return ret; + + dev_dbg(&pdev->dev, "loaded Raspberry Pi's VL805 firmware\n"); + + return 0; +} +EXPORT_SYMBOL_GPL(rpi_firmware_init_vl805); + static const struct of_device_id rpi_firmware_of_match[] = { { .compatible = "raspberrypi,bcm2835-firmware", }, {}, diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h index cc9cdbc66403..3025aca3c358 100644 --- a/include/soc/bcm2835/raspberrypi-firmware.h +++ b/include/soc/bcm2835/raspberrypi-firmware.h @@ -10,6 +10,7 @@ #include struct rpi_firmware; +struct pci_dev; enum rpi_firmware_property_status { RPI_FIRMWARE_STATUS_REQUEST = 0, @@ -141,6 +142,7 @@ int rpi_firmware_property(struct rpi_firmware *fw, int rpi_firmware_property_list(struct rpi_firmware *fw, void *data, size_t tag_size); struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node); +int rpi_firmware_init_vl805(struct pci_dev *pdev); #else static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag, void *data, size_t len) @@ -158,6 +160,11 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware { return NULL; } + +static inline int rpi_firmware_init_vl805(struct pci_dev *pdev) +{ + return 0; +} #endif #endif /* __SOC_RASPBERRY_FIRMWARE_H__ */