From patchwork Mon Nov 23 07:55:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bongsu Jeon X-Patchwork-Id: 1404666 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=pass (p=none dis=none) header.from=samsung.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=samsung.com header.i=@samsung.com header.a=rsa-sha256 header.s=mail20170921 header.b=chFVYJrg; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CffbZ2x07z9sRR for ; Mon, 23 Nov 2020 18:55:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728020AbgKWHzd (ORCPT ); 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Mon, 23 Nov 2020 07:55:30 +0000 (GMT) Received: from epsmges2p2.samsung.com (unknown [182.195.40.182]) by epsnrtp2.localdomain (Postfix) with ESMTP id 4Cffb367SMzMqYkr; Mon, 23 Nov 2020 07:55:27 +0000 (GMT) X-AuditID: b6c32a46-1d9ff7000000dbf8-ac-5fbb6aee8105 Received: from epcas2p3.samsung.com ( [182.195.41.55]) by epsmges2p2.samsung.com (Symantec Messaging Gateway) with SMTP id 38.36.56312.EEA6BBF5; Mon, 23 Nov 2020 16:55:26 +0900 (KST) Mime-Version: 1.0 Subject: [PATCH net-next 1/2] dt-bindings: net: nfc: s3fwrn5: Support a UART interface Reply-To: bongsu.jeon@samsung.com Sender: Bongsu Jeon From: Bongsu Jeon To: "krzk@kernel.org" , "kuba@kernel.org" CC: "linux-nfc@lists.01.org" , "netdev@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20201123075526epcms2p59410a8ba942f8942f53a593d9df764d0@epcms2p5> Date: Mon, 23 Nov 2020 16:55:26 +0900 X-CMS-MailID: 20201123075526epcms2p59410a8ba942f8942f53a593d9df764d0 X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrEJsWRmVeSWpSXmKPExsWy7bCmue67rN3xBhcfK1jMP3KO1eL8+Q3s Fhe29bFaXN41h81izobN7BbHFog5sHlsWtXJ5tE9+x+Lx+dNcgHMUQ2MNolFyRmZZakKqXnJ +SmZeem2SqEhbroWSgoZ+cUltkrRhhZGeoaWpnomlnpG5rFWhgYGRqZKCnmJuam2ShW6UN1K CkXJBUDVJanFJUWpyalAoSKH4pLE9FS94sTc4tK8dL3k/FwlhbLEnFKgPiV9O5uM1MSU1CKF hCeMGX+ePmYqOMBTMXWPTgNjB2cXIweHhICJxI2til2MXBxCAjsYJX41LmIBifMKCEr83SHc xcjJISwQIXG88SsTiC0koCjxv+McG0RcV+LF36NgNpuAtsTao41gNSICPhILdyxgApnJLPCC UWLrmkusIAkJAV6JGe1PWSBsaYnty7cyQtgaEj+W9TJD2KISN1e/ZYex3x+bD1UjItF67yxU jaDEg5+7oeKSEm/3zWMHWSYh0M4ocf7nDzYIZwajxKnNf6E69CUWn1sBdh6vgK/E+0tzwTaw CKhKnHl1GGqSi8SGpbfAbGYBeYntb+cwg0KCWUBTYv0ufUhgKUscucUCUcEn0XH4LzvMXzvm PWGCsFUlepu/MMH8OHl2C9R0D4mzl78xQwIxUOLQkk7GCYwKsxBBPQvJ3lkIexcwMq9iFEst KM5NTy02KjBCjudNjOB0qeW2g3HK2w96hxiZOBgPMUpwMCuJ8LbK7YwX4k1JrKxKLcqPLyrN SS0+xFgF9PFEZinR5Hxgws4riTc0MzAyMzU2MTY2NTElW9jUyMzMwNLUwtTMyEJJnDd0ZV+8 kEB6YklqdmpqQWoRzHImDk6pBqaypcHTJ+hkxNl9KP/7TKkgen7+tF0bYvv87h885vn/7dZV azsc1ztWrPk7Jf8h085r7rl5jZdZzi/IaDz6QkPn013hdTqMMw5eTfHm4+SZn7f/Ukjfzpgy rr8dJ2bxdLQc7l43LTynVPd04uabvQ/CFMwyVQSOtSpN9fm3+R0jv5ug9XGNnpJv4idZtD1a T706UHV6e0ex6Y7NK36aRyepxBd/eCt86PGnm2kChyzmmjyfbllcamVyTvuq+pxnbWFyi/+/ ZXM9dktr56o+mxkTVulstpPPSZcK+umskpNaE3ayVmv/mTmHZlpUVpRsVNPbfCYtbo3uEnEe vTM9Sk9X7wrsXyUrYljfGVtR1KDEUpyRaKjFXFScCACeEfVtZQQAAA== DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20201123075526epcms2p59410a8ba942f8942f53a593d9df764d0 References: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Since S3FWRN82 NFC Chip, The UART interface can be used. S3FWRN82 supports I2C and UART interface. Signed-off-by: Bongsu Jeon --- .../bindings/net/nfc/samsung,s3fwrn5.yaml | 28 +++++++++++++++++-- 1 file changed, 26 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml index cb0b8a560282..37b3e5ae5681 100644 --- a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml +++ b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml @@ -13,6 +13,7 @@ maintainers: properties: compatible: const: samsung,s3fwrn5-i2c + const: samsung,s3fwrn82-uart en-gpios: maxItems: 1 @@ -47,10 +48,19 @@ additionalProperties: false required: - compatible - en-gpios - - interrupts - - reg - wake-gpios +allOf: + - if: + properties: + compatible: + contains: + const: samsung,s3fwrn5-i2c + then: + required: + - interrupts + - reg + examples: - | #include @@ -71,3 +81,17 @@ examples: wake-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>; }; }; + # UART example on Raspberry Pi + - | + &uart0 { + status = "okay"; + + s3fwrn82_uart { + compatible = "samsung,s3fwrn82-uart"; + + en-gpios = <&gpio 20 0>; + wake-gpios = <&gpio 16 0>; + + status = "okay"; + }; + }; From patchwork Mon Nov 23 07:56:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bongsu Jeon X-Patchwork-Id: 1404668 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=pass (p=none dis=none) header.from=samsung.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=samsung.com header.i=@samsung.com header.a=rsa-sha256 header.s=mail20170921 header.b=UV3HtczW; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CffdM1Z4nz9sTL for ; 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Mon, 23 Nov 2020 07:57:02 +0000 (GMT) Received: from epsmges2p1.samsung.com (unknown [182.195.40.188]) by epsnrtp2.localdomain (Postfix) with ESMTP id 4Cffcr2GXlzMqYl8; Mon, 23 Nov 2020 07:57:00 +0000 (GMT) X-AuditID: b6c32a45-337ff7000001297d-1f-5fbb6b4af633 Received: from epcas2p1.samsung.com ( [182.195.41.53]) by epsmges2p1.samsung.com (Symantec Messaging Gateway) with SMTP id F0.36.10621.A4B6BBF5; Mon, 23 Nov 2020 16:56:58 +0900 (KST) Mime-Version: 1.0 Subject: [PATCH net-next 2/2] net: nfc: s3fwrn5: Support a UART interface Reply-To: bongsu.jeon@samsung.com Sender: Bongsu Jeon From: Bongsu Jeon To: "krzk@kernel.org" , "kuba@kernel.org" CC: "linux-kernel@vger.kernel.org" , "linux-nfc@lists.01.org" , "netdev@vger.kernel.org" X-Priority: 3 X-Content-Kind-Code: NORMAL X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <20201123075658epcms2p5a6237314f7a72a2556545d3f96261c93@epcms2p5> Date: Mon, 23 Nov 2020 16:56:58 +0900 X-CMS-MailID: 20201123075658epcms2p5a6237314f7a72a2556545d3f96261c93 X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMKsWRmVeSWpSXmKPExsWy7bCmqa5X9u54g3WT+C3On9/AbnFhWx+r xeVdc9gs5mzYzG5xbIGYA6vHplWdbB7ds/+xeHzeJBfAHJVjk5GamJJapJCal5yfkpmXbqvk HRzvHG9qZmCoa2hpYa6kkJeYm2qr5OIToOuWmQO0UUmhLDGnFCgUkFhcrKRvZ1OUX1qSqpCR X1xiq5RakJJTYGhYoFecmFtcmpeul5yfa2VoYGBkClSZkJNxu2E+c8E8+4qvX74yNzBuNeli 5OSQEDCRmDx/LnsXIxeHkMAORoml7z4zdjFycPAKCEr83SEMYgoLeEqcPyUNUi4koCjxv+Mc G4gtLKAr8eLvUTCbTUBbYu3RRiYQW0TAR2LhjgVMICOZBVYzSkycs4oVYhevxIz2pywQtrTE 9uVbGSFsDYkfy3qZIWxRiZur37LD2O+PzYeqEZFovXcWqkZQ4sHP3VBxSYm3++aB3S8h0M4o cf7nDzYIZwajxKnNf6E69CUWn1sBdh6vgK/E2T1LwDawCKhKfF29iQmixkXi0/QTYNcxC8hL bH87hxnke2YBTYn1u/RBTAkBZYkjt6Aq+CQ6Dv9lh/lrx7wnUFNUJXqbvzDB/Dh5dgvUnR4S v1cuZ4EEYqDE1L4uxgmMCrMQIT0Lyd5ZCHsXMDKvYhRLLSjOTU8tNiowRI7cTYzg1KfluoNx 8tsPeocYmTgYDzFKcDArifC2yu2MF+JNSaysSi3Kjy8qzUktPsRoCvTxRGYp0eR8YPLNK4k3 NDUyMzOwNLUwNTOyUBLnDV3ZFy8kkJ5YkpqdmlqQWgTTx8TBKdXA1CKQ9p3n/fElLlk/Mv+Y iKc2XtnPEOWT9oCtZxpX11Mla/m9bX77ui4pLde5rVgzp18/74mtu8nWFxNaZ+y/pZ7Sv/DR r/RIka/qcctYrk3/L3b21exwkce/FqUcOBou38Ny3UM6+07Sh8+JOTzLyl9s3vj8wbrMtpeR d7TnHpGcptB65d3lCdZZe+9cF5tdr7lN54pSgs9BN7MrN46f/SZ+61D8naV7OIQWaD1uOWQX q7lg2+m1z5l2Tp67KvqR8UypuAs8K6RDri49rqnVZ7bTWNohznV6bfeLuws+rTz0pjoqcda0 5HnxjKbsc8qLalkY0pYwB/F9WP/M86mRTvYONrFSoXsv+u9KHbznqazEUpyRaKjFXFScCABV Yf00BgQAAA== DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20201123075658epcms2p5a6237314f7a72a2556545d3f96261c93 References: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Since S3FWRN82 NFC Chip, The UART interface can be used. S3FWRN82 uses NCI protocol and supports I2C and UART interface. Signed-off-by: Bongsu Jeon --- drivers/nfc/s3fwrn5/Kconfig | 12 ++ drivers/nfc/s3fwrn5/Makefile | 2 + drivers/nfc/s3fwrn5/uart.c | 250 +++++++++++++++++++++++++++++++++++ 3 files changed, 264 insertions(+) create mode 100644 drivers/nfc/s3fwrn5/uart.c diff --git a/drivers/nfc/s3fwrn5/Kconfig b/drivers/nfc/s3fwrn5/Kconfig index 3f8b6da58280..6f88737769e1 100644 --- a/drivers/nfc/s3fwrn5/Kconfig +++ b/drivers/nfc/s3fwrn5/Kconfig @@ -20,3 +20,15 @@ config NFC_S3FWRN5_I2C To compile this driver as a module, choose m here. The module will be called s3fwrn5_i2c.ko. Say N if unsure. + +config NFC_S3FWRN82_UART + tristate "Samsung S3FWRN82 UART support" + depends on NFC_NCI && SERIAL_DEV_BUS + select NFC_S3FWRN5 + help + This module adds support for a UART interface to the S3FWRN82 chip. + Select this if your platform is using the UART bus. + + To compile this driver as a module, choose m here. The module will + be called s3fwrn82_uart.ko. + Say N if unsure. diff --git a/drivers/nfc/s3fwrn5/Makefile b/drivers/nfc/s3fwrn5/Makefile index d0ffa35f50e8..d1902102060b 100644 --- a/drivers/nfc/s3fwrn5/Makefile +++ b/drivers/nfc/s3fwrn5/Makefile @@ -5,6 +5,8 @@ s3fwrn5-objs = core.o firmware.o nci.o s3fwrn5_i2c-objs = i2c.o +s3fwrn82_uart-objs = uart.o obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5.o obj-$(CONFIG_NFC_S3FWRN5_I2C) += s3fwrn5_i2c.o +obj-$(CONFIG_NFC_S3FWRN82_UART) += s3fwrn82_uart.o diff --git a/drivers/nfc/s3fwrn5/uart.c b/drivers/nfc/s3fwrn5/uart.c new file mode 100644 index 000000000000..b3c36a5b28d3 --- /dev/null +++ b/drivers/nfc/s3fwrn5/uart.c @@ -0,0 +1,250 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * UART Link Layer for S3FWRN82 NCI based Driver + * + * Copyright (C) 2020 Samsung Electronics + * Author: Bongsu Jeon + * All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "s3fwrn5.h" + +#define S3FWRN82_UART_DRIVER_NAME "s3fwrn82_uart" +#define S3FWRN82_NCI_HEADER 3 +#define S3FWRN82_NCI_IDX 2 +#define S3FWRN82_EN_WAIT_TIME 20 +#define NCI_SKB_BUFF_LEN 258 + +struct s3fwrn82_uart_phy { + struct serdev_device *ser_dev; + struct nci_dev *ndev; + struct sk_buff *recv_skb; + + unsigned int gpio_en; + unsigned int gpio_fw_wake; + + /* mutex is used to synchronize */ + struct mutex mutex; + enum s3fwrn5_mode mode; +}; + +static void s3fwrn82_uart_set_wake(void *phy_id, bool wake) +{ + struct s3fwrn82_uart_phy *phy = phy_id; + + mutex_lock(&phy->mutex); + gpio_set_value(phy->gpio_fw_wake, wake); + msleep(S3FWRN82_EN_WAIT_TIME); + mutex_unlock(&phy->mutex); +} + +static void s3fwrn82_uart_set_mode(void *phy_id, enum s3fwrn5_mode mode) +{ + struct s3fwrn82_uart_phy *phy = phy_id; + + mutex_lock(&phy->mutex); + if (phy->mode == mode) + goto out; + phy->mode = mode; + gpio_set_value(phy->gpio_en, 1); + gpio_set_value(phy->gpio_fw_wake, 0); + if (mode == S3FWRN5_MODE_FW) + gpio_set_value(phy->gpio_fw_wake, 1); + if (mode != S3FWRN5_MODE_COLD) { + msleep(S3FWRN82_EN_WAIT_TIME); + gpio_set_value(phy->gpio_en, 0); + msleep(S3FWRN82_EN_WAIT_TIME); + } +out: + mutex_unlock(&phy->mutex); +} + +static enum s3fwrn5_mode s3fwrn82_uart_get_mode(void *phy_id) +{ + struct s3fwrn82_uart_phy *phy = phy_id; + enum s3fwrn5_mode mode; + + mutex_lock(&phy->mutex); + mode = phy->mode; + mutex_unlock(&phy->mutex); + return mode; +} + +static int s3fwrn82_uart_write(void *phy_id, struct sk_buff *out) +{ + struct s3fwrn82_uart_phy *phy = phy_id; + int err; + + err = serdev_device_write(phy->ser_dev, + out->data, out->len, + MAX_SCHEDULE_TIMEOUT); + if (err < 0) + return err; + + return 0; +} + +static const struct s3fwrn5_phy_ops uart_phy_ops = { + .set_wake = s3fwrn82_uart_set_wake, + .set_mode = s3fwrn82_uart_set_mode, + .get_mode = s3fwrn82_uart_get_mode, + .write = s3fwrn82_uart_write, +}; + +static int s3fwrn82_uart_read(struct serdev_device *serdev, + const unsigned char *data, + size_t count) +{ + struct s3fwrn82_uart_phy *phy = serdev_device_get_drvdata(serdev); + size_t i; + + for (i = 0; i < count; i++) { + skb_put_u8(phy->recv_skb, *data++); + + if (phy->recv_skb->len < S3FWRN82_NCI_HEADER) + continue; + + if ((phy->recv_skb->len - S3FWRN82_NCI_HEADER) + < phy->recv_skb->data[S3FWRN82_NCI_IDX]) + continue; + + s3fwrn5_recv_frame(phy->ndev, phy->recv_skb, phy->mode); + phy->recv_skb = alloc_skb(NCI_SKB_BUFF_LEN, GFP_KERNEL); + if (!phy->recv_skb) + return 0; + } + + return i; +} + +static struct serdev_device_ops s3fwrn82_serdev_ops = { + .receive_buf = s3fwrn82_uart_read, + .write_wakeup = serdev_device_write_wakeup, +}; + +static const struct of_device_id s3fwrn82_uart_of_match[] = { + { .compatible = "samsung,s3fwrn82-uart", }, + {}, +}; +MODULE_DEVICE_TABLE(of, s3fwrn82_uart_of_match); + +static int s3fwrn82_uart_parse_dt(struct serdev_device *serdev) +{ + struct s3fwrn82_uart_phy *phy = serdev_device_get_drvdata(serdev); + struct device_node *np = serdev->dev.of_node; + + if (!np) + return -ENODEV; + + phy->gpio_en = of_get_named_gpio(np, "en-gpios", 0); + if (!gpio_is_valid(phy->gpio_en)) + return -ENODEV; + + phy->gpio_fw_wake = of_get_named_gpio(np, "wake-gpios", 0); + if (!gpio_is_valid(phy->gpio_fw_wake)) + return -ENODEV; + + return 0; +} + +static int s3fwrn82_uart_probe(struct serdev_device *serdev) +{ + struct s3fwrn82_uart_phy *phy; + int ret = -ENOMEM; + + phy = devm_kzalloc(&serdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + goto err_exit; + + phy->recv_skb = alloc_skb(NCI_SKB_BUFF_LEN, GFP_KERNEL); + if (!phy->recv_skb) + goto err_free; + + mutex_init(&phy->mutex); + phy->mode = S3FWRN5_MODE_COLD; + + phy->ser_dev = serdev; + serdev_device_set_drvdata(serdev, phy); + serdev_device_set_client_ops(serdev, &s3fwrn82_serdev_ops); + ret = serdev_device_open(serdev); + if (ret) { + dev_err(&serdev->dev, "Unable to open device\n"); + goto err_skb; + } + + ret = serdev_device_set_baudrate(serdev, 115200); + if (ret != 115200) { + ret = -EINVAL; + goto err_serdev; + } + + serdev_device_set_flow_control(serdev, false); + + ret = s3fwrn82_uart_parse_dt(serdev); + if (ret < 0) + goto err_serdev; + + ret = devm_gpio_request_one(&phy->ser_dev->dev, + phy->gpio_en, + GPIOF_OUT_INIT_HIGH, + "s3fwrn82_en"); + if (ret < 0) + goto err_serdev; + + ret = devm_gpio_request_one(&phy->ser_dev->dev, + phy->gpio_fw_wake, + GPIOF_OUT_INIT_LOW, + "s3fwrn82_fw_wake"); + if (ret < 0) + goto err_serdev; + + ret = s3fwrn5_probe(&phy->ndev, phy, &phy->ser_dev->dev, &uart_phy_ops); + if (ret < 0) + goto err_serdev; + + return ret; + +err_serdev: + serdev_device_close(serdev); +err_skb: + kfree_skb(phy->recv_skb); +err_free: + kfree(phy); +err_exit: + return ret; +} + +static void s3fwrn82_uart_remove(struct serdev_device *serdev) +{ + struct s3fwrn82_uart_phy *phy = serdev_device_get_drvdata(serdev); + + s3fwrn5_remove(phy->ndev); + serdev_device_close(serdev); + kfree_skb(phy->recv_skb); + kfree(phy); +} + +static struct serdev_device_driver s3fwrn82_uart_driver = { + .probe = s3fwrn82_uart_probe, + .remove = s3fwrn82_uart_remove, + .driver = { + .name = S3FWRN82_UART_DRIVER_NAME, + .of_match_table = of_match_ptr(s3fwrn82_uart_of_match), + }, +}; + +module_serdev_device_driver(s3fwrn82_uart_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("UART driver for Samsung NFC"); +MODULE_AUTHOR("Bongsu Jeon ");