From patchwork Mon Oct 12 10:46:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= X-Patchwork-Id: 1380809 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=silabs.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=silabs.onmicrosoft.com header.i=@silabs.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-silabs-onmicrosoft-com header.b=g+mzqXhZ; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4C8wPQ4yGBz9sTq for ; Mon, 12 Oct 2020 21:47:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387900AbgJLKrw (ORCPT ); Mon, 12 Oct 2020 06:47:52 -0400 Received: from mail-dm6nam11on2077.outbound.protection.outlook.com ([40.107.223.77]:59904 "EHLO NAM11-DM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2387717AbgJLKrp (ORCPT ); Mon, 12 Oct 2020 06:47:45 -0400 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=IuJvRbR1stYWXsTlvid4zZhufk1dGP/DZx6A7cEJL6mrtcTHG/FfAffRqnyP0neCzzHXs5XdHwW8+9RKFuilDkhkvZnDLY1ghLVlcsYPG3WBjGBEbfy0W2XHxJ2Eq26oAli+0zYwR4vN9wFSY4ekGCM4pYi/YN2O97HZb7RrHgkh1j2UvcSnGu0jWoY/cQA4UP943TPValbJDuJmqe6sTEl59//ZqrVGBYal1pqAW3GF5MYPCbY4/pQ/Gb2GNiruqls/Umj49zzzd/hGKFVeupl86HSt2P1kZ3XTDyJjLQgJ2LLrysbIwsuFPcOypn8WqCpdL1L7ks6d1HOLuTfjGw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zBJw+Nyc5Pt6+CVdBbO3vTELXkCDorsL639neCuDNYc=; b=NJS6PijZE0WZ+nzqKyQuA1qnpktE8LiL9TxKai5+4K/Xkm2fBQkpjw5BnUrlOwGamtPDCuvdVY2R7Vr2hDK8/ViJS39th3zf9gNEU/ki2HybDAQDh2MZlhfrH2hXCNfKhufBawhIrMPIMh0Pw6iBAnLcm3fsIBLlk12XQDwBqsaQBk61ZhzGnAWuAvyqSJv7dH/Vbb3OlN0fBp9p/4vZ7y4xYeph3LcwACqYXR2jSztNMqdD6VtDdK4kwxvShLAYf4uF+ThL1JlVIGfOWefPMPoN9OKoIBYNvTaRyNQvYGHWxm7XNSP9AS5pv+d5CEYaZcMYBs7bSan9ZaklI5dWqQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=silabs.com; dmarc=pass action=none header.from=silabs.com; dkim=pass header.d=silabs.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=silabs.onmicrosoft.com; s=selector2-silabs-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zBJw+Nyc5Pt6+CVdBbO3vTELXkCDorsL639neCuDNYc=; b=g+mzqXhZRKPYD95JWW4zXpR7FCyolNS93AY0UNMEKDASpoc6lCl3jhGwIx7MpbxLESEYASpNCoR7YmULx4wY9cmw8RBeVxrRWcAilkogGEUBZHixJFlYUOVEXw/eILQI/5Pxxl4JqrVIUHFk+KczxBZyk13sFzuFU2TOOMkjpE8= Authentication-Results: vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=none action=none header.from=silabs.com; Received: from SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) by SA0PR11MB4734.namprd11.prod.outlook.com (2603:10b6:806:99::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3455.23; Mon, 12 Oct 2020 10:47:19 +0000 Received: from SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::4f5:fbe5:44a7:cb8a]) by SN6PR11MB2718.namprd11.prod.outlook.com ([fe80::4f5:fbe5:44a7:cb8a%5]) with mapi id 15.20.3455.029; Mon, 12 Oct 2020 10:47:19 +0000 From: Jerome Pouiller To: linux-wireless@vger.kernel.org, netdev@vger.kernel.org Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Kalle Valo , "David S . Miller" , devicetree@vger.kernel.org, Rob Herring , =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= Subject: [PATCH 07/23] wfx: add bus_sdio.c Date: Mon, 12 Oct 2020 12:46:32 +0200 Message-Id: <20201012104648.985256-8-Jerome.Pouiller@silabs.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201012104648.985256-1-Jerome.Pouiller@silabs.com> References: <20201012104648.985256-1-Jerome.Pouiller@silabs.com> X-Originating-IP: [82.67.86.106] X-ClientProxiedBy: PR3P189CA0005.EURP189.PROD.OUTLOOK.COM (2603:10a6:102:52::10) To SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from pc-42.home (82.67.86.106) by PR3P189CA0005.EURP189.PROD.OUTLOOK.COM (2603:10a6:102:52::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3455.21 via Frontend Transport; Mon, 12 Oct 2020 10:47:17 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 545ea4f0-5d44-475d-d880-08d86e9c30f1 X-MS-TrafficTypeDiagnostic: SA0PR11MB4734: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6790; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: Rzvx1ZKkWy6xxrnSm71ywpnu+VcdMpgu83UxMGVunmtSxKwxgokp27iJM59ZMENRRnbH4PHlnM4vXIUw+OvC/h3HR4iRtecmT58u7Hdu3UmHsGrPs7lD1XwISCGbS05g82UqAToPGKZniaUriLl0b0It9AWMU6QR9hjtJzaWc6bJEXxUe5gLDpCifUGxkj5w28n3D4QyPgIXSR/0HwmFAPFXfvynWiFxd/vgh36l8XWOortJA9wEZ/W6nk8IIW6YLWWXpUhWFtvMXtsTGy6/ihRo8Kd8PbYBbGAIsz9cRtxbmDnyW1d+YyibZw9+cufu X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR11MB2718.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(39850400004)(396003)(366004)(136003)(346002)(376002)(66556008)(66476007)(6512007)(26005)(36756003)(66946007)(16526019)(186003)(316002)(4326008)(2616005)(956004)(1076003)(5660300002)(107886003)(6486002)(54906003)(86362001)(8676002)(83380400001)(8936002)(66574015)(52116002)(2906002)(6506007)(8886007)(6666004)(478600001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: silabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: 545ea4f0-5d44-475d-d880-08d86e9c30f1 X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB2718.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Oct 2020 10:47:18.9573 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 54dbd822-5231-4b20-944d-6f4abcd541fb X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: KWHe6l9Fug8LAOwCtm+VPqFjN+KzuB7eXezfJalNaTJoQlTm8lJ03xzwMslN3OT243gju4WgTbE3Wuax6XApYQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR11MB4734 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jérôme Pouiller Signed-off-by: Jérôme Pouiller --- drivers/net/wireless/silabs/wfx/bus_sdio.c | 269 +++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 drivers/net/wireless/silabs/wfx/bus_sdio.c diff --git a/drivers/net/wireless/silabs/wfx/bus_sdio.c b/drivers/net/wireless/silabs/wfx/bus_sdio.c new file mode 100644 index 000000000000..e06d7e1ebe9c --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/bus_sdio.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SDIO interface. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#include +#include +#include +#include +#include +#include +#include + +#include "bus.h" +#include "wfx.h" +#include "hwio.h" +#include "main.h" +#include "bh.h" + +static const struct wfx_platform_data wfx_sdio_pdata = { + .file_fw = "wfm_wf200", + .file_pds = "wf200.pds", +}; + +struct wfx_sdio_priv { + struct sdio_func *func; + struct wfx_dev *core; + u8 buf_id_tx; + u8 buf_id_rx; + int of_irq; +}; + +static int wfx_sdio_copy_from_io(void *priv, unsigned int reg_id, + void *dst, size_t count) +{ + struct wfx_sdio_priv *bus = priv; + unsigned int sdio_addr = reg_id << 2; + int ret; + + WARN(reg_id > 7, "chip only has 7 registers"); + WARN(((uintptr_t)dst) & 3, "unaligned buffer size"); + WARN(count & 3, "unaligned buffer address"); + + /* Use queue mode buffers */ + if (reg_id == WFX_REG_IN_OUT_QUEUE) + sdio_addr |= (bus->buf_id_rx + 1) << 7; + ret = sdio_memcpy_fromio(bus->func, dst, sdio_addr, count); + if (!ret && reg_id == WFX_REG_IN_OUT_QUEUE) + bus->buf_id_rx = (bus->buf_id_rx + 1) % 4; + + return ret; +} + +static int wfx_sdio_copy_to_io(void *priv, unsigned int reg_id, + const void *src, size_t count) +{ + struct wfx_sdio_priv *bus = priv; + unsigned int sdio_addr = reg_id << 2; + int ret; + + WARN(reg_id > 7, "chip only has 7 registers"); + WARN(((uintptr_t)src) & 3, "unaligned buffer size"); + WARN(count & 3, "unaligned buffer address"); + + /* Use queue mode buffers */ + if (reg_id == WFX_REG_IN_OUT_QUEUE) + sdio_addr |= bus->buf_id_tx << 7; + // FIXME: discards 'const' qualifier for src + ret = sdio_memcpy_toio(bus->func, sdio_addr, (void *)src, count); + if (!ret && reg_id == WFX_REG_IN_OUT_QUEUE) + bus->buf_id_tx = (bus->buf_id_tx + 1) % 32; + + return ret; +} + +static void wfx_sdio_lock(void *priv) +{ + struct wfx_sdio_priv *bus = priv; + + sdio_claim_host(bus->func); +} + +static void wfx_sdio_unlock(void *priv) +{ + struct wfx_sdio_priv *bus = priv; + + sdio_release_host(bus->func); +} + +static void wfx_sdio_irq_handler(struct sdio_func *func) +{ + struct wfx_sdio_priv *bus = sdio_get_drvdata(func); + + wfx_bh_request_rx(bus->core); +} + +static irqreturn_t wfx_sdio_irq_handler_ext(int irq, void *priv) +{ + struct wfx_sdio_priv *bus = priv; + + sdio_claim_host(bus->func); + wfx_bh_request_rx(bus->core); + sdio_release_host(bus->func); + return IRQ_HANDLED; +} + +static int wfx_sdio_irq_subscribe(void *priv) +{ + struct wfx_sdio_priv *bus = priv; + u32 flags; + int ret; + u8 cccr; + + if (!bus->of_irq) { + sdio_claim_host(bus->func); + ret = sdio_claim_irq(bus->func, wfx_sdio_irq_handler); + sdio_release_host(bus->func); + return ret; + } + + sdio_claim_host(bus->func); + cccr = sdio_f0_readb(bus->func, SDIO_CCCR_IENx, NULL); + cccr |= BIT(0); + cccr |= BIT(bus->func->num); + sdio_f0_writeb(bus->func, cccr, SDIO_CCCR_IENx, NULL); + sdio_release_host(bus->func); + flags = irq_get_trigger_type(bus->of_irq); + if (!flags) + flags = IRQF_TRIGGER_HIGH; + flags |= IRQF_ONESHOT; + return devm_request_threaded_irq(&bus->func->dev, bus->of_irq, NULL, + wfx_sdio_irq_handler_ext, flags, + "wfx", bus); +} + +static int wfx_sdio_irq_unsubscribe(void *priv) +{ + struct wfx_sdio_priv *bus = priv; + int ret; + + if (bus->of_irq) + devm_free_irq(&bus->func->dev, bus->of_irq, bus); + sdio_claim_host(bus->func); + ret = sdio_release_irq(bus->func); + sdio_release_host(bus->func); + return ret; +} + +static size_t wfx_sdio_align_size(void *priv, size_t size) +{ + struct wfx_sdio_priv *bus = priv; + + return sdio_align_size(bus->func, size); +} + +static const struct hwbus_ops wfx_sdio_hwbus_ops = { + .copy_from_io = wfx_sdio_copy_from_io, + .copy_to_io = wfx_sdio_copy_to_io, + .irq_subscribe = wfx_sdio_irq_subscribe, + .irq_unsubscribe = wfx_sdio_irq_unsubscribe, + .lock = wfx_sdio_lock, + .unlock = wfx_sdio_unlock, + .align_size = wfx_sdio_align_size, +}; + +static const struct of_device_id wfx_sdio_of_match[] = { + { .compatible = "silabs,wfx-sdio" }, + { .compatible = "silabs,wf200" }, + { }, +}; +MODULE_DEVICE_TABLE(of, wfx_sdio_of_match); + +static int wfx_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + struct device_node *np = func->dev.of_node; + struct wfx_sdio_priv *bus; + int ret; + + if (func->num != 1) { + dev_err(&func->dev, "SDIO function number is %d while it should always be 1 (unsupported chip?)\n", + func->num); + return -ENODEV; + } + + bus = devm_kzalloc(&func->dev, sizeof(*bus), GFP_KERNEL); + if (!bus) + return -ENOMEM; + + if (np) { + if (!of_match_node(wfx_sdio_of_match, np)) { + dev_warn(&func->dev, "no compatible device found in DT\n"); + return -ENODEV; + } + bus->of_irq = irq_of_parse_and_map(np, 0); + } else { + dev_warn(&func->dev, + "device is not declared in DT, features will be limited\n"); + // FIXME: ignore VID/PID and only rely on device tree + // return -ENODEV; + } + + bus->func = func; + sdio_set_drvdata(func, bus); + func->card->quirks |= MMC_QUIRK_LENIENT_FN0 | + MMC_QUIRK_BLKSZ_FOR_BYTE_MODE | + MMC_QUIRK_BROKEN_BYTE_MODE_512; + + sdio_claim_host(func); + ret = sdio_enable_func(func); + // Block of 64 bytes is more efficient than 512B for frame sizes < 4k + sdio_set_block_size(func, 64); + sdio_release_host(func); + if (ret) + goto err0; + + bus->core = wfx_init_common(&func->dev, &wfx_sdio_pdata, + &wfx_sdio_hwbus_ops, bus); + if (!bus->core) { + ret = -EIO; + goto err1; + } + + ret = wfx_probe(bus->core); + if (ret) + goto err1; + + return 0; + +err1: + sdio_claim_host(func); + sdio_disable_func(func); + sdio_release_host(func); +err0: + return ret; +} + +static void wfx_sdio_remove(struct sdio_func *func) +{ + struct wfx_sdio_priv *bus = sdio_get_drvdata(func); + + wfx_release(bus->core); + sdio_claim_host(func); + sdio_disable_func(func); + sdio_release_host(func); +} + +#define SDIO_VENDOR_ID_SILABS 0x0000 +#define SDIO_DEVICE_ID_SILABS_WF200 0x1000 +static const struct sdio_device_id wfx_sdio_ids[] = { + { SDIO_DEVICE(SDIO_VENDOR_ID_SILABS, SDIO_DEVICE_ID_SILABS_WF200) }, + // FIXME: ignore VID/PID and only rely on device tree + // { SDIO_DEVICE(SDIO_ANY_ID, SDIO_ANY_ID) }, + { }, +}; +MODULE_DEVICE_TABLE(sdio, wfx_sdio_ids); + +struct sdio_driver wfx_sdio_driver = { + .name = "wfx-sdio", + .id_table = wfx_sdio_ids, + .probe = wfx_sdio_probe, + .remove = wfx_sdio_remove, + .drv = { + .owner = THIS_MODULE, + .of_match_table = wfx_sdio_of_match, + } +};