From patchwork Sun Jan 28 17:33:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 13534587 Received: from mail.andi.de1.cc (mail.andi.de1.cc [178.238.236.174]) (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 69A722E62A; Sun, 28 Jan 2024 18:06:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.238.236.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706465178; cv=none; b=r/YyvXC37SGGoenAN+U5cHPmLn+xTcw5mxI52WajVx/m2luwGmxcIbhqs/td1OxAHxBUp3xvr02X6z8lKwvPfduHsbtTc6ey78El1k4DwHWeEgAZwD3gxjBhXe1ZSxcXJf0tIBAmyiNZOU/Xtzl2ExDrQti82pfvnvklmAtgS0g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706465178; c=relaxed/simple; bh=sS1ZWEmQKtZR7kwdEZ+vuqXJLlJ/VTALKyjf/CpHz2U=; h=From:To:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QFPFBzm6b9jC9bScAjKUKF4Q76vCij9cJvgeI19j8sIGMDzrVANt2+QQAxk83Uz5+42+WF6fv6Ag1S7ZLQroFpVbCSKzAqJiWwyf4sKt8Ey+h80NTSyEoHPsJZvqX3UBLg8ze2aCGchTfyDm+HvDL7EltgPx/l75t6D4vxKpqsc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kemnade.info; spf=pass smtp.mailfrom=kemnade.info; dkim=pass (2048-bit key) header.d=kemnade.info header.i=@kemnade.info header.b=l5YE3eTz; arc=none smtp.client-ip=178.238.236.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kemnade.info Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kemnade.info Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kemnade.info header.i=@kemnade.info header.b="l5YE3eTz" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20220719; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Wqej4+vmTV/rU8AtrwDFmSZQizv8btuEV2EtfTfvd/8=; b=l5YE3eTzYsQYcO7x3N661sRzKX +7qFZ8/zRZBqVG4a41b+F0JEGCvLlrboPFIxoolUf5AAkY4UymjGAJyxygTJxBrT74t3L27hUr1TN k4LflZytG+bZQ9bh+KkaIKPM97N61dzLkkxPiy3XOO5TVrna70FgzB4+rFvkFWc6BmjhxHUdqOITo kzIha6oJuWiT6OD/qy49BqNW1lu/zIADbS1qwAiXmxEe22mcUwY1FYuEmubYic0WCSSl60dUQR2IY h3kQmewRVuflREZuokofcnhidqsW5JxIxl+hz2n7DBohwsSrI0nC0nrNd2OWb4VAsaG0Whrr4m3R6 Yzmq/Frw==; Received: from p200300c2070939001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:c2:709:3900:1a3d:a2ff:febf:d33a] helo=aktux) by mail.andi.de1.cc with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1rU92c-008qDd-CQ; Sun, 28 Jan 2024 18:33:58 +0100 Received: from andi by aktux with local (Exim 4.96) (envelope-from ) id 1rU92b-00BO9l-2W; Sun, 28 Jan 2024 18:33:57 +0100 From: Andreas Kemnade To: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com, johan@kernel.org, jirislaby@kernel.org, andreas@kemnade.info, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, Adam Ford , Tony Lindgren , tomi.valkeinen@ideasonboard.com, =?utf-8?q?P=C3=A9ter_Ujfalusi?= , robh@kernel.org, hns@goldelico.com Subject: [RFC PATCH v2 2/3] bluetooth: ti-st: Add GNSS subdevice for TI Wilink chips Date: Sun, 28 Jan 2024 18:33:51 +0100 Message-Id: <20240128173352.2714442-3-andreas@kemnade.info> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240128173352.2714442-1-andreas@kemnade.info> References: <20240128173352.2714442-1-andreas@kemnade.info> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Some of these chips have GNSS support. GNSS support is available through channel 9 whilst FM is through channel 8. Add a platform subdevice for GNSS so that a driver for that functionality can be build. To avoid having useless GNSS devices, do it only when the devicetree node namecontains gnss. Signed-off-by: Andreas Kemnade Reviewed-by: Paul Menzel --- drivers/bluetooth/hci_ll.c | 81 ++++++++++++++++++++++++++++++++++++ include/linux/ti_wilink_st.h | 8 ++++ 2 files changed, 89 insertions(+) diff --git a/drivers/bluetooth/hci_ll.c b/drivers/bluetooth/hci_ll.c index 4a0b5c3160c2b..09e5a4dbd2f8c 100644 --- a/drivers/bluetooth/hci_ll.c +++ b/drivers/bluetooth/hci_ll.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -68,6 +69,9 @@ struct ll_device { struct gpio_desc *enable_gpio; struct clk *ext_clk; bdaddr_t bdaddr; + + void (*gnss_recv_func)(struct device *dev, struct sk_buff *skb); + struct platform_device *gnssdev; }; struct ll_struct { @@ -78,6 +82,8 @@ struct ll_struct { struct sk_buff_head tx_wait_q; /* HCILL wait queue */ }; +static int ll_gnss_register(struct ll_device *lldev); +static int ll_gnss_recv_frame(struct hci_dev *hdev, struct sk_buff *skb); /* * Builds and sends an HCILL command packet. * These are very simple packets with only 1 cmd byte @@ -411,6 +417,13 @@ static int ll_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) .lsize = 0, \ .maxlen = 0 +#define LL_RECV_GNSS \ + .type = 9, \ + .hlen = 3, \ + .loff = 1, \ + .lsize = 2 + + static const struct h4_recv_pkt ll_recv_pkts[] = { { H4_RECV_ACL, .recv = hci_recv_frame }, { H4_RECV_SCO, .recv = hci_recv_frame }, @@ -419,6 +432,7 @@ static const struct h4_recv_pkt ll_recv_pkts[] = { { LL_RECV_SLEEP_ACK, .recv = ll_recv_frame }, { LL_RECV_WAKE_IND, .recv = ll_recv_frame }, { LL_RECV_WAKE_ACK, .recv = ll_recv_frame }, + { LL_RECV_GNSS, .recv = ll_gnss_recv_frame }, }; /* Recv data */ @@ -677,9 +691,69 @@ static int ll_setup(struct hci_uart *hu) } } + if (strstr(of_node_full_name(serdev->dev.of_node), "gnss")) + ll_gnss_register(lldev); + + return 0; +} + +struct hci_dev *st_get_hci(struct device *dev) +{ + struct ll_device *lldev = dev_get_drvdata(dev); + + return lldev->hu.hdev; +} +EXPORT_SYMBOL(st_get_hci); + +void st_set_gnss_recv_func(struct device *dev, + void (*recv_frame)(struct device *, struct sk_buff *)) +{ + struct ll_device *lldev = dev_get_drvdata(dev); + + lldev->gnss_recv_func = recv_frame; +} +EXPORT_SYMBOL(st_set_gnss_recv_func); + +static int ll_gnss_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + struct ll_device *lldev = container_of(hu, struct ll_device, hu); + + if (!lldev->gnssdev) + return 0; + + if (lldev->gnss_recv_func) { + lldev->gnss_recv_func(&lldev->gnssdev->dev, skb); + return 0; + } + kfree_skb(skb); + return 0; } +static int ll_gnss_register(struct ll_device *lldev) +{ + struct platform_device *pdev; + int ret; + + pdev = platform_device_alloc("ti-ai2-gnss", PLATFORM_DEVID_AUTO); + if (!pdev) + return -ENOMEM; + + pdev->dev.parent = &lldev->serdev->dev; + lldev->gnssdev = pdev; + ret = platform_device_add(pdev); + if (ret) + goto err; + + return 0; + +err: + lldev->gnssdev = NULL; + platform_device_put(pdev); + return ret; +} + static const struct hci_uart_proto llp; static int hci_ti_probe(struct serdev_device *serdev) @@ -757,12 +831,19 @@ static int hci_ti_probe(struct serdev_device *serdev) } return hci_uart_register_device(hu, &llp); + + + return 0; } + static void hci_ti_remove(struct serdev_device *serdev) { struct ll_device *lldev = serdev_device_get_drvdata(serdev); + if (lldev->gnssdev) + platform_device_unregister(lldev->gnssdev); + hci_uart_unregister_device(&lldev->hu); } diff --git a/include/linux/ti_wilink_st.h b/include/linux/ti_wilink_st.h index 10642d4844f0c..eccc2db004069 100644 --- a/include/linux/ti_wilink_st.h +++ b/include/linux/ti_wilink_st.h @@ -381,6 +381,14 @@ unsigned long st_ll_getstate(struct st_data_s *); unsigned long st_ll_sleep_state(struct st_data_s *, unsigned char); void st_ll_wakeup(struct st_data_s *); +/** + * various funcs used to interact between FM, GPS and BT + */ +struct hci_dev *st_get_hci(struct device *dev); +void st_set_gnss_recv_func(struct device *dev, + void (*recv_frame)(struct device *, struct sk_buff *)); + + /* * header information used by st_core.c for FM and GPS * packet parsing, the bluetooth headers are already available