From patchwork Wed Mar 14 15:55:13 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Escande X-Patchwork-Id: 131653 Delivered-To: patch@linaro.org Received: by 10.80.210.197 with SMTP id q5csp339223edg; Wed, 14 Mar 2018 08:59:29 -0700 (PDT) X-Google-Smtp-Source: AG47ELtM5p0OJrACJZqfCSeJjcX7qkvBZWcmdxd7PYm7VRGLyfDZtJ4AcFOQapw8/dAwNr9Fb3xl X-Received: by 2002:a17:902:2e04:: with SMTP id q4-v6mr4613634plb.22.1521043168938; Wed, 14 Mar 2018 08:59:28 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1521043168; cv=none; d=google.com; s=arc-20160816; b=v7bFp6pWTTe+pCg4oNkksHo2Cmxeb/p9+cRHyvZVk1d9K145kUHUBDkIjXmHScBBl7 SsXsS5OIuLKo+Q498JphWgNsW4c6ypPgtK+62mXubkwwi40p3ejb5Ve8YrQ6uZTrehVB 4oEiMue3h3bhlG/8cRmMTWbmHa6CfNLwplWD+UU2bwUHzw/ayn/grJVMd9AiT3u1s0ry RgW6dg9YbbrB0nXccu5K4MxZMUqQ8fQuWY5v17cjfrWqajHm6t0MtCooLKAEVYzUUs3B 3YGR+MIyU4zn6K4QnZ1efJxtEw/vKZu66kYI/D/wc0v3VL4bAkkKgAitPtp/l8ZprfID 2HyQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfert-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=rvUXxEtEkuTMIrHfagGLBL/ro9c8LNsEzK8GMY5iSgU=; b=znWr35eVnfhw36ZQmSiuSUeu7+mRLvDGSzVsHil6iICHxVhgSOLFwcoi1RKC1dvHed +bN7+e7lapwfzDnFm1+/OTSZx8p1qYCFD7EhBTXd8speeGnqlrnpfVxEuaHSDLCTL7mZ YYqDxTFZy/CFJ4vCmF+aIw3ewNpVnUjLjdU5C3WMCt4thQKKI1/8zm2PSCstRGz4U2Rj Bf4inVfMr5OYIS9ieB0BJFonwYiWS/Y2SOQdiemm1F7LU7APa57eEt0f4s1eC6kDqGwL YWKUzgdwbHqlnwYVDwakPMRf0XGpr7An3N/bq4+EtsaDJYXPj6qDH6y8HRNfYtlwdcAg Buiw== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org header.s=google header.b=Z4M/xg8c; spf=pass (google.com: best guess record for domain of linux-bluetooth-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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[88.167.228.121]) by smtp.gmail.com with ESMTPSA id n127sm1418909wmb.5.2018.03.14.08.55.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Mar 2018 08:55:39 -0700 (PDT) From: Thierry Escande To: Rob Herring , Andy Gross , Marcel Holtmann , Johan Hedberg , David Brown , Mark Rutland , Andy Shevchenko , Loic Poulain , Bjorn Andersson Cc: Srinivas Kandagatla , linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/3] dt-bindings: net: bluetooth: Add qualcomm-bluetooth Date: Wed, 14 Mar 2018 16:55:13 +0100 Message-Id: <20180314155514.3374-3-thierry.escande@linaro.org> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180314155514.3374-1-thierry.escande@linaro.org> References: <20180314155514.3374-1-thierry.escande@linaro.org> MIME-Version: 1.0 Content-Transfert-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Add binding document for serial bluetooth chips using Qualcomm protocol. Signed-off-by: Thierry Escande --- v4: - Move bt-disable-n-gpios to required properties section - Add clocks and pinctrl-0 as required properties v3: no change v2: no change .../devicetree/bindings/net/qualcomm-bluetooth.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt new file mode 100644 index 000000000000..cdb14b96c229 --- /dev/null +++ b/Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt @@ -0,0 +1,34 @@ +Qualcomm Bluetooth Chips +--------------------- + +This documents the binding structure and common properties for serial +attached Qualcomm devices. + +Serial attached Qualcomm devices shall be a child node of the host UART +device the slave device is attached to. + +Required properties: + - compatible: should contain one of the following: + * "qcom,qca6174-bt" + - bt-disable-n-gpios: gpio specifier, used to enable chip during probe + - pinctrl-0: pin phandle for bt_en gpio + - clocks: clock phandle for SUSCLK_32KHZ + +Example: + +serial@7570000 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&blsp1_uart1_default>; + pinctrl-1 = <&blsp1_uart1_sleep>; + + bluetooth { + compatible = "qcom,qca6174-bt"; + + bt-disable-n-gpios = <&pm8994_gpios 19 GPIO_ACTIVE_HIGH>; + + pinctrl-names = "default"; + pinctrl-0 = <&bt_en_pin_a>; + + clocks = <&divclk4>; + }; +}; From patchwork Wed Mar 14 15:55:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Escande X-Patchwork-Id: 131651 Delivered-To: patch@linaro.org Received: by 10.46.89.16 with SMTP id n16csp2183968ljb; Wed, 14 Mar 2018 08:56:05 -0700 (PDT) X-Google-Smtp-Source: AG47ELtEWO8rVHRADB3X1uKU++HhIsF5gT6J5Gf7hFoUR7xY5I1hgn5UvPn7Cl2nsePWuxfiztBL X-Received: by 10.99.64.197 with SMTP id n188mr4105274pga.21.1521042965069; Wed, 14 Mar 2018 08:56:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1521042965; cv=none; d=google.com; s=arc-20160816; b=eGgxR1LEc3Ojrn4vkxxaStCnGPLy9brPbMmBYsm6tJtebyERvqfajloE0hMtn5Qnie wdKlETotVpAU9kQHppaagMw5gN/GfSMCh45J8+PhsEjWYo816K1OAIeXdHdL4fwmf1H3 k3S8T4eL+dNLrp7mlqhsdwU6vMQ9qLX4JJO2Xd5r4iKlfjVnzcpNHj6nLP5Ws1PawBdr GJTWoJRoAf0Bfh4LDckQ69JQakbVXjNDIqkO1sKasAiW7/MZzGPslhkHUc9998EKn5Ag Ek4yJHJEd/6Nypa35O0JbXs2MakYTMzztzhey07PpXy95izm+lE/m90HEhh/Docokqvj cHbw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfert-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=UNRUchNtvZO/1qr9CAqC0AUwwk3C3m0fowgS+gr+NWU=; b=UXPccQaXAUZ4Z+zLryyZ77UvzWskdm9ontVNbb4P4S3pgvo9ryQ5DvJO7H/mTiF3DN XSjnFbjImTXeVTAbCJOwLmZaRyoZAiT574QTwJppMW1vCRk7qGBRcnywXmOBkudb/1Ee 9rJiqVUhaENNOoWIjpFPOR0GoWG+wkmbxvz5GpQr0KCkfzWgMmJYY+9Mhe8dfoTWtx7D Nx6LxWW4bOn9ejF290f6vUsgsh/UFdQvjKICWm1ncCXChex+i9kpB1vBRf0OFfBwki+Z vJWxKTJy4xoNBQa/fR5CX8uVDmnASzR1zTbC3s/fAHElmVBbXHExR0csGPDpXB1OA3qC HfjA== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org header.s=google header.b=kF7BlCAN; spf=pass (google.com: best guess record for domain of linux-bluetooth-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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[88.167.228.121]) by smtp.gmail.com with ESMTPSA id n127sm1418909wmb.5.2018.03.14.08.55.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Mar 2018 08:55:42 -0700 (PDT) From: Thierry Escande To: Rob Herring , Andy Gross , Marcel Holtmann , Johan Hedberg , David Brown , Mark Rutland , Andy Shevchenko , Loic Poulain , Bjorn Andersson Cc: Srinivas Kandagatla , linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/3] Bluetooth: hci_qca: Add serdev support Date: Wed, 14 Mar 2018 16:55:14 +0100 Message-Id: <20180314155514.3374-4-thierry.escande@linaro.org> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180314155514.3374-1-thierry.escande@linaro.org> References: <20180314155514.3374-1-thierry.escande@linaro.org> MIME-Version: 1.0 Content-Transfert-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Add support for Qualcomm serial slave devices. Probe the serial device, retrieve its maximum speed and register a new hci uart device. Signed-off-by: Thierry Escande --- v4: - Rename divclk4 as susclk (its name in the bt chip) - Use gpiod_set_value_cansleep() - Replace #include with - Restore dependency on BT_HCIUART v3: - Remove redundant call to gpiod_set_value() after devm_gpiod_get() - Check returned values for clk_set_rate() and clk_prepare_enable() - Use clk_disable_unprepare() v2: - Fix author email drivers/bluetooth/Kconfig | 1 + drivers/bluetooth/hci_qca.c | 109 +++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 108 insertions(+), 2 deletions(-) -- 2.14.1 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 07e55cd8f8c8..e0f1a6609b68 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -196,6 +196,7 @@ config BT_HCIUART_BCM config BT_HCIUART_QCA bool "Qualcomm Atheros protocol support" depends on BT_HCIUART + depends on BT_HCIUART_SERDEV select BT_HCIUART_H4 select BT_QCA help diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 05ec530b8a3a..6cf0d1d4595a 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -29,7 +29,11 @@ */ #include +#include #include +#include +#include +#include #include #include @@ -50,6 +54,9 @@ #define IBS_TX_IDLE_TIMEOUT_MS 2000 #define BAUDRATE_SETTLE_TIMEOUT_MS 300 +/* susclk rate */ +#define SUSCLK_RATE_32KHZ 32768 + /* HCI_IBS transmit side sleep protocol states */ enum tx_ibs_states { HCI_IBS_TX_ASLEEP, @@ -111,6 +118,12 @@ struct qca_data { u64 votes_off; }; +struct qca_serdev { + struct hci_uart serdev_hu; + struct gpio_desc *bt_en; + struct clk *susclk; +}; + static void __serial_clock_on(struct tty_struct *tty) { /* TODO: Some chipset requires to enable UART clock on client @@ -386,6 +399,7 @@ static void hci_ibs_wake_retrans_timeout(struct timer_list *t) /* Initialize protocol */ static int qca_open(struct hci_uart *hu) { + struct qca_serdev *qcadev; struct qca_data *qca; BT_DBG("hu %p qca_open", hu); @@ -444,6 +458,13 @@ static int qca_open(struct hci_uart *hu) timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS; + if (hu->serdev) { + serdev_device_open(hu->serdev); + + qcadev = serdev_device_get_drvdata(hu->serdev); + gpiod_set_value_cansleep(qcadev->bt_en, 1); + } + BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u", qca->tx_idle_delay, qca->wake_retrans); @@ -512,6 +533,7 @@ static int qca_flush(struct hci_uart *hu) /* Close protocol */ static int qca_close(struct hci_uart *hu) { + struct qca_serdev *qcadev; struct qca_data *qca = hu->priv; BT_DBG("hu %p qca close", hu); @@ -525,6 +547,13 @@ static int qca_close(struct hci_uart *hu) destroy_workqueue(qca->workqueue); qca->hu = NULL; + if (hu->serdev) { + serdev_device_close(hu->serdev); + + qcadev = serdev_device_get_drvdata(hu->serdev); + gpiod_set_value_cansleep(qcadev->bt_en, 0); + } + kfree_skb(qca->rx_skb); hu->priv = NULL; @@ -885,6 +914,14 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) return 0; } +static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) +{ + if (hu->serdev) + serdev_device_set_baudrate(hu->serdev, speed); + else + hci_uart_set_baudrate(hu, speed); +} + static int qca_setup(struct hci_uart *hu) { struct hci_dev *hdev = hu->hdev; @@ -905,7 +942,7 @@ static int qca_setup(struct hci_uart *hu) speed = hu->proto->init_speed; if (speed) - hci_uart_set_baudrate(hu, speed); + host_set_baudrate(hu, speed); /* Setup user speed if needed */ speed = 0; @@ -924,7 +961,7 @@ static int qca_setup(struct hci_uart *hu) ret); return ret; } - hci_uart_set_baudrate(hu, speed); + host_set_baudrate(hu, speed); } /* Setup patch / NVM configurations */ @@ -958,12 +995,80 @@ static struct hci_uart_proto qca_proto = { .dequeue = qca_dequeue, }; +static int qca_serdev_probe(struct serdev_device *serdev) +{ + struct qca_serdev *qcadev; + int err; + + qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); + if (!qcadev) + return -ENOMEM; + + qcadev->serdev_hu.serdev = serdev; + serdev_device_set_drvdata(serdev, qcadev); + + qcadev->bt_en = devm_gpiod_get(&serdev->dev, "bt-disable-n", + GPIOD_OUT_LOW); + if (IS_ERR(qcadev->bt_en)) { + dev_err(&serdev->dev, "failed to acquire bt-disable-n gpio\n"); + return PTR_ERR(qcadev->bt_en); + } + + qcadev->susclk = devm_clk_get(&serdev->dev, NULL); + if (IS_ERR(qcadev->susclk)) { + dev_err(&serdev->dev, "failed to acquire clk\n"); + return PTR_ERR(qcadev->susclk); + } + + err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); + if (err) + return err; + + err = clk_prepare_enable(qcadev->susclk); + if (err) + return err; + + err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); + if (err) + clk_disable_unprepare(qcadev->susclk); + + return err; +} + +static void qca_serdev_remove(struct serdev_device *serdev) +{ + struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); + + hci_uart_unregister_device(&qcadev->serdev_hu); + + clk_disable_unprepare(qcadev->susclk); +} + +static const struct of_device_id qca_bluetooth_of_match[] = { + { .compatible = "qcom,qca6174-bt" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); + +static struct serdev_device_driver qca_serdev_driver = { + .probe = qca_serdev_probe, + .remove = qca_serdev_remove, + .driver = { + .name = "hci_uart_qca", + .of_match_table = qca_bluetooth_of_match, + }, +}; + int __init qca_init(void) { + serdev_device_driver_register(&qca_serdev_driver); + return hci_uart_register_proto(&qca_proto); } int __exit qca_deinit(void) { + serdev_device_driver_unregister(&qca_serdev_driver); + return hci_uart_unregister_proto(&qca_proto); }