From nobody Fri Jan 2 00:41:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ACD74CDB474 for ; Tue, 17 Oct 2023 10:11:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343603AbjJQKLf (ORCPT ); Tue, 17 Oct 2023 06:11:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234926AbjJQKL3 (ORCPT ); Tue, 17 Oct 2023 06:11:29 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 029F4E8; Tue, 17 Oct 2023 03:11:28 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id d9443c01a7336-1c9b70b9656so32612115ad.1; Tue, 17 Oct 2023 03:11:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697537487; x=1698142287; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=L/xhityidHANRldjqCZLdwURqWfb6ZxMT/TSWeuUQRw=; b=TdHR09/FojOWswG0B9uZQ0Gafvv6fm/jrtC82N64ET9P38KoASGB0nhv2kJofNyZZs ddZog2+bMQ1pqFJBW7d16aFpOlx7OCGxK7MlLKd5AygTMBdalLTaKpKoCUSQNzde1Rwo aJD4zT1TH3f6NFVQcbrJOP7q+pZSlUc/PltVGKkSgEd/el/VVp+6g/q8CW/aaPQxk0HD yIdSTDkypnHod+SXywL0ceHaeT9eyqu9fItV5Fp1qwNwov/S81I/YAL0vdW7O3NaFGoH D3x4gYymLRocDEvihgwum4T1yJlu9OarG/Rjdf9Lt0D1yG406QN9Iy8nWZHTzj8MJbmF NZ/w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697537487; x=1698142287; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=L/xhityidHANRldjqCZLdwURqWfb6ZxMT/TSWeuUQRw=; b=BAoUVpqE1NKjAD4mqm+ucWocRb+bkSnNLsAiW1vuzSCpuGUl7ro++idwt4azkLDlso 3XZ8bDSR6Mn4MujOcwAosfmM4Rcrd3ivJ176oyRfJ8F4Qu95TQjfag9dMbtYmJJtxGta dA1zOiyZeUUiYRSpunQrqgflYd5g/4+us0ubqhyHPhRl33UXrCGjNjtZ3fwXox3D2i1D GKur2dalbF2YoXRsb06bl8cA1mcLHC8TOQgQpjZyvWeXGHRGMWkJ0K6SQT7G1j073LiY YQARyhVqlPLVgJii7EUUydnleIMrjLinUmAnaIEfaqdYhrAuocY7ZHROBCju6xq+yIHQ nCUA== X-Gm-Message-State: AOJu0Yxa5bI9yMq63bS/nTY3lS968RP1ZpU51TVe5gbSanDhz4Rvifkw NrwJ0AuuN+q/qq6oQAqcpr8= X-Google-Smtp-Source: AGHT+IERzA5Z7Z0TYiNwEpJH1G57kh34XWYQ19Y6Czdr8THGHCovdeCYtJWE1UDEHzJ5penp9zhgfQ== X-Received: by 2002:a17:902:ce8b:b0:1ca:3d53:2867 with SMTP id f11-20020a170902ce8b00b001ca3d532867mr2062576plg.15.1697537487400; Tue, 17 Oct 2023 03:11:27 -0700 (PDT) Received: from toolbox.iitism.net ([103.15.228.94]) by smtp.gmail.com with ESMTPSA id q9-20020a170902dac900b001bbb8d5166bsm1127634plx.123.2023.10.17.03.11.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Oct 2023 03:11:26 -0700 (PDT) From: Ayush Singh To: greybus-dev@lists.linaro.org Cc: Ayush Singh , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, vaishnav@beagleboard.org, jkridner@beagleboard.org, nm@ti.com, krzysztof.kozlowski+dt@linaro.org, vigneshr@ti.com, kristo@kernel.org, robh+dt@kernel.org, conor+dt@kernel.org, linux-arm-kernel@lists.infradead.org, Krzysztof Kozlowski Subject: [PATCH v9 1/3] dt-bindings: net: Add ti,cc1352p7 Date: Tue, 17 Oct 2023 15:41:12 +0530 Message-ID: <20231017101116.178041-2-ayushdevel1325@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231017101116.178041-1-ayushdevel1325@gmail.com> References: <20231017101116.178041-1-ayushdevel1325@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add DT bindings for Texas Instruments Simplelink CC1352P7 wireless MCU BeaglePlay has CC1352P7 co-processor connected to the main AM62 (running Linux) over UART. In the BeagleConnect Technology, CC1352 is responsible for handling 6LoWPAN communication with beagleconnect freedom nodes as well as their discovery. Signed-off-by: Ayush Singh Reviewed-by: Krzysztof Kozlowski Reviewed-by: Nishanth Menon --- .../devicetree/bindings/net/ti,cc1352p7.yaml | 51 +++++++++++++++++++ MAINTAINERS | 6 +++ 2 files changed, 57 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/ti,cc1352p7.yaml diff --git a/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml b/Docum= entation/devicetree/bindings/net/ti,cc1352p7.yaml new file mode 100644 index 000000000000..3dde10de4630 --- /dev/null +++ b/Documentation/devicetree/bindings/net/ti,cc1352p7.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/ti,cc1352p7.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments Simplelink CC1352P7 wireless MCU + +description: + The CC1352P7 MCU can be connected via SPI or UART. + +maintainers: + - Ayush Singh + +properties: + compatible: + const: ti,cc1352p7 + + clocks: + items: + - description: high-frequency main system (MCU and peripherals) clock + - description: low-frequency system clock + + clock-names: + items: + - const: sclk_hf + - const: sclk_lf + + reset-gpios: + maxItems: 1 + + vdds-supply: true + +required: + - compatible + +additionalProperties: false + +examples: + - | + #include + + serial { + mcu { + compatible =3D "ti,cc1352p7"; + clocks =3D <&sclk_hf 0>, <&sclk_lf 25>; + clock-names =3D "sclk_hf", "sclk_lf"; + reset-gpios =3D <&pio 35 GPIO_ACTIVE_LOW>; + vdds-supply =3D <&vdds>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 37b9626ee654..5467669d7963 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8969,6 +8969,12 @@ F: drivers/staging/greybus/sdio.c F: drivers/staging/greybus/spi.c F: drivers/staging/greybus/spilib.c =20 +GREYBUS BEAGLEPLAY DRIVERS +M: Ayush Singh +L: greybus-dev@lists.linaro.org (moderated for non-subscribers) +S: Maintained +F: Documentation/devicetree/bindings/net/ti,cc1352p7.yaml + GREYBUS SUBSYSTEM M: Johan Hovold M: Alex Elder --=20 2.41.0 From nobody Fri Jan 2 00:41:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0AF8CDB474 for ; Tue, 17 Oct 2023 10:11:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343646AbjJQKLh (ORCPT ); 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Tue, 17 Oct 2023 03:11:30 -0700 (PDT) From: Ayush Singh To: greybus-dev@lists.linaro.org Cc: Ayush Singh , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, vaishnav@beagleboard.org, jkridner@beagleboard.org, nm@ti.com, krzysztof.kozlowski+dt@linaro.org, johan@kernel.org, elder@kernel.org Subject: [PATCH v9 2/3] greybus: Add BeaglePlay Linux Driver Date: Tue, 17 Oct 2023 15:41:13 +0530 Message-ID: <20231017101116.178041-3-ayushdevel1325@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231017101116.178041-1-ayushdevel1325@gmail.com> References: <20231017101116.178041-1-ayushdevel1325@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add the Greybus host driver for BeaglePlay board by BeagleBoard.org. The current greybus setup involves running SVC in a user-space application (GBridge) and using netlink to communicate with kernel space. GBridge itself uses wpanusb kernel driver, so the greybus messages travel from kernel space (gb_netlink) to user-space (GBridge) and then back to kernel space (wpanusb) before reaching CC1352. This driver directly communicates with CC1352 (running SVC Zephyr application). Thus, it simplifies the complete greybus setup eliminating user-space GBridge. This driver is responsible for the following: - Start SVC (CC1352) on driver load. - Send/Receive Greybus messages to/from CC1352 using HDLC over UART. - Print Logs from CC1352. - Stop SVC (CC1352) on driver load. Signed-off-by: Ayush Singh --- MAINTAINERS | 1 + drivers/greybus/Kconfig | 10 + drivers/greybus/Makefile | 2 + drivers/greybus/gb-beagleplay.c | 501 ++++++++++++++++++++++++++++++++ 4 files changed, 514 insertions(+) create mode 100644 drivers/greybus/gb-beagleplay.c diff --git a/MAINTAINERS b/MAINTAINERS index 5467669d7963..d87e30626a6a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8974,6 +8974,7 @@ M: Ayush Singh L: greybus-dev@lists.linaro.org (moderated for non-subscribers) S: Maintained F: Documentation/devicetree/bindings/net/ti,cc1352p7.yaml +F: drivers/greybus/gb-beagleplay.c =20 GREYBUS SUBSYSTEM M: Johan Hovold diff --git a/drivers/greybus/Kconfig b/drivers/greybus/Kconfig index 78ba3c3083d5..033d31dbf3b8 100644 --- a/drivers/greybus/Kconfig +++ b/drivers/greybus/Kconfig @@ -17,6 +17,16 @@ menuconfig GREYBUS =20 if GREYBUS =20 +config GREYBUS_BEAGLEPLAY + tristate "Greybus BeaglePlay driver" + depends on SERIAL_DEV_BUS + help + Select this option if you have a BeaglePlay where CC1352 + co-processor acts as Greybus SVC. + + To compile this code as a module, chose M here: the module + will be called gb-beagleplay.ko + config GREYBUS_ES2 tristate "Greybus ES3 USB host controller" depends on USB diff --git a/drivers/greybus/Makefile b/drivers/greybus/Makefile index 9bccdd229aa2..d986e94f8897 100644 --- a/drivers/greybus/Makefile +++ b/drivers/greybus/Makefile @@ -18,6 +18,8 @@ obj-$(CONFIG_GREYBUS) +=3D greybus.o # needed for trace events ccflags-y +=3D -I$(src) =20 +obj-$(CONFIG_GREYBUS_BEAGLEPLAY) +=3D gb-beagleplay.o + # Greybus Host controller drivers gb-es2-y :=3D es2.o =20 diff --git a/drivers/greybus/gb-beagleplay.c b/drivers/greybus/gb-beaglepla= y.c new file mode 100644 index 000000000000..43318c1993ba --- /dev/null +++ b/drivers/greybus/gb-beagleplay.c @@ -0,0 +1,501 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Beagleplay Linux Driver for Greybus + * + * Copyright (c) 2023 Ayush Singh + * Copyright (c) 2023 BeagleBoard.org Foundation + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RX_HDLC_PAYLOAD 256 +#define CRC_LEN 2 +#define MAX_RX_HDLC (1 + RX_HDLC_PAYLOAD + CRC_LEN) +#define TX_CIRC_BUF_SIZE 1024 + +#define ADDRESS_GREYBUS 0x01 +#define ADDRESS_DBG 0x02 +#define ADDRESS_CONTROL 0x03 + +#define HDLC_FRAME 0x7E +#define HDLC_ESC 0x7D +#define HDLC_XOR 0x20 + +#define CONTROL_SVC_START 0x01 +#define CONTROL_SVC_STOP 0x02 + +/* The maximum number of CPorts supported by Greybus Host Device */ +#define GB_MAX_CPORTS 32 + +/** + * struct gb_beagleplay - BeaglePlay Greybus driver + * + * @sd: underlying serdev device + * + * @gb_hd: greybus host device + * + * @tx_work: hdlc transmit work + * @tx_producer_lock: hdlc transmit data producer lock. acquired when appe= nding data to buffer. + * @tx_consumer_lock: hdlc transmit data consumer lock. acquired when send= ing data over uart. + * @tx_circ_buf: hdlc transmit circular buffer. + * @tx_crc: hdlc transmit crc-ccitt fcs + * + * @rx_buffer_len: length of receive buffer filled. + * @rx_buffer: hdlc frame receive buffer + * @rx_in_esc: hdlc rx flag to indicate ESC frame + */ +struct gb_beagleplay { + struct serdev_device *sd; + + struct gb_host_device *gb_hd; + + struct work_struct tx_work; + spinlock_t tx_producer_lock; + spinlock_t tx_consumer_lock; + struct circ_buf tx_circ_buf; + u16 tx_crc; + + u16 rx_buffer_len; + bool rx_in_esc; + u8 rx_buffer[MAX_RX_HDLC]; +}; + +/** + * struct hdlc_payload - Structure to represent part of HDCL frame payload= data. + * + * @len: buffer length in bytes + * @buf: payload buffer + */ +struct hdlc_payload { + u16 len; + void *buf; +}; + +static void hdlc_rx_greybus_frame(struct gb_beagleplay *bg, u8 *buf, u16 l= en) +{ + u16 cport_id; + struct gb_operation_msg_hdr *hdr =3D (struct gb_operation_msg_hdr *)buf; + + memcpy(&cport_id, hdr->pad, sizeof(cport_id)); + + dev_dbg(&bg->sd->dev, "Greybus Operation %u type %X cport %u status %u re= ceived", + hdr->operation_id, hdr->type, cport_id, hdr->result); + + greybus_data_rcvd(bg->gb_hd, cport_id, buf, len); +} + +static void hdlc_rx_dbg_frame(const struct gb_beagleplay *bg, const char *= buf, u16 len) +{ + dev_dbg(&bg->sd->dev, "CC1352 Log: %.*s", (int)len, buf); +} + +/** + * hdlc_write() - Consume HDLC Buffer. + * @bg: beagleplay greybus driver + * + * Assumes that consumer lock has been acquired. + */ +static void hdlc_write(struct gb_beagleplay *bg) +{ + int written; + /* Start consuming HDLC data */ + int head =3D smp_load_acquire(&bg->tx_circ_buf.head); + int tail =3D bg->tx_circ_buf.tail; + int count =3D CIRC_CNT_TO_END(head, tail, TX_CIRC_BUF_SIZE); + const unsigned char *buf =3D &bg->tx_circ_buf.buf[tail]; + + if (count > 0) { + written =3D serdev_device_write_buf(bg->sd, buf, count); + + /* Finish consuming HDLC data */ + smp_store_release(&bg->tx_circ_buf.tail, (tail + written) & (TX_CIRC_BUF= _SIZE - 1)); + } +} + +/** + * hdlc_append() - Queue HDLC data for sending. + * @bg: beagleplay greybus driver + * @value: hdlc byte to transmit + * + * Assumes that producer lock as been acquired. + */ +static void hdlc_append(struct gb_beagleplay *bg, u8 value) +{ + int tail, head =3D bg->tx_circ_buf.head; + + while (true) { + tail =3D READ_ONCE(bg->tx_circ_buf.tail); + + if (CIRC_SPACE(head, tail, TX_CIRC_BUF_SIZE) >=3D 1) { + bg->tx_circ_buf.buf[head] =3D value; + + /* Finish producing HDLC byte */ + smp_store_release(&bg->tx_circ_buf.head, + (head + 1) & (TX_CIRC_BUF_SIZE - 1)); + return; + } + dev_warn(&bg->sd->dev, "Tx circ buf full"); + usleep_range(3000, 5000); + } +} + +static void hdlc_append_escaped(struct gb_beagleplay *bg, u8 value) +{ + if (value =3D=3D HDLC_FRAME || value =3D=3D HDLC_ESC) { + hdlc_append(bg, HDLC_ESC); + value ^=3D HDLC_XOR; + } + hdlc_append(bg, value); +} + +static void hdlc_append_tx_frame(struct gb_beagleplay *bg) +{ + bg->tx_crc =3D 0xFFFF; + hdlc_append(bg, HDLC_FRAME); +} + +static void hdlc_append_tx_u8(struct gb_beagleplay *bg, u8 value) +{ + bg->tx_crc =3D crc_ccitt(bg->tx_crc, &value, 1); + hdlc_append_escaped(bg, value); +} + +static void hdlc_append_tx_buf(struct gb_beagleplay *bg, const u8 *buf, u1= 6 len) +{ + size_t i; + + for (i =3D 0; i < len; i++) + hdlc_append_tx_u8(bg, buf[i]); +} + +static void hdlc_append_tx_crc(struct gb_beagleplay *bg) +{ + bg->tx_crc ^=3D 0xffff; + hdlc_append_escaped(bg, bg->tx_crc & 0xff); + hdlc_append_escaped(bg, (bg->tx_crc >> 8) & 0xff); +} + +static void hdlc_transmit(struct work_struct *work) +{ + struct gb_beagleplay *bg =3D container_of(work, struct gb_beagleplay, tx_= work); + + spin_lock_bh(&bg->tx_consumer_lock); + hdlc_write(bg); + spin_unlock_bh(&bg->tx_consumer_lock); +} + +static void hdlc_tx_frames(struct gb_beagleplay *bg, u8 address, u8 contro= l, + const struct hdlc_payload payloads[], size_t count) +{ + size_t i; + + spin_lock(&bg->tx_producer_lock); + + hdlc_append_tx_frame(bg); + hdlc_append_tx_u8(bg, address); + hdlc_append_tx_u8(bg, control); + + for (i =3D 0; i < count; ++i) + hdlc_append_tx_buf(bg, payloads[i].buf, payloads[i].len); + + hdlc_append_tx_crc(bg); + hdlc_append_tx_frame(bg); + + spin_unlock(&bg->tx_producer_lock); + + schedule_work(&bg->tx_work); +} + +static void hdlc_tx_s_frame_ack(struct gb_beagleplay *bg) +{ + hdlc_tx_frames(bg, bg->rx_buffer[0], (bg->rx_buffer[1] >> 1) & 0x7, NULL,= 0); +} + +static void hdlc_rx_frame(struct gb_beagleplay *bg) +{ + u16 crc, len; + u8 ctrl, *buf; + u8 address =3D bg->rx_buffer[0]; + + crc =3D crc_ccitt(0xffff, bg->rx_buffer, bg->rx_buffer_len); + if (crc !=3D 0xf0b8) { + dev_warn_ratelimited(&bg->sd->dev, "CRC failed from %02x: 0x%04x", addre= ss, crc); + return; + } + + ctrl =3D bg->rx_buffer[1]; + buf =3D &bg->rx_buffer[2]; + len =3D bg->rx_buffer_len - 4; + + /* I-Frame, send S-Frame ACK */ + if ((ctrl & 1) =3D=3D 0) + hdlc_tx_s_frame_ack(bg); + + switch (address) { + case ADDRESS_DBG: + hdlc_rx_dbg_frame(bg, buf, len); + break; + case ADDRESS_GREYBUS: + hdlc_rx_greybus_frame(bg, buf, len); + break; + default: + dev_warn_ratelimited(&bg->sd->dev, "unknown frame %u", address); + } +} + +static int hdlc_rx(struct gb_beagleplay *bg, const u8 *data, size_t count) +{ + size_t i; + u8 c; + + for (i =3D 0; i < count; ++i) { + c =3D data[i]; + + switch (c) { + case HDLC_FRAME: + if (bg->rx_buffer_len) + hdlc_rx_frame(bg); + + bg->rx_buffer_len =3D 0; + break; + case HDLC_ESC: + bg->rx_in_esc =3D true; + break; + default: + if (bg->rx_in_esc) { + c ^=3D 0x20; + bg->rx_in_esc =3D false; + } + + if (bg->rx_buffer_len < MAX_RX_HDLC) { + bg->rx_buffer[bg->rx_buffer_len] =3D c; + bg->rx_buffer_len++; + } else { + dev_err_ratelimited(&bg->sd->dev, "RX Buffer Overflow"); + bg->rx_buffer_len =3D 0; + } + } + } + + return count; +} + +static int hdlc_init(struct gb_beagleplay *bg) +{ + INIT_WORK(&bg->tx_work, hdlc_transmit); + spin_lock_init(&bg->tx_producer_lock); + spin_lock_init(&bg->tx_consumer_lock); + bg->tx_circ_buf.head =3D 0; + bg->tx_circ_buf.tail =3D 0; + + bg->tx_circ_buf.buf =3D devm_kmalloc(&bg->sd->dev, TX_CIRC_BUF_SIZE, GFP_= KERNEL); + if (!bg->tx_circ_buf.buf) + return -ENOMEM; + + bg->rx_buffer_len =3D 0; + bg->rx_in_esc =3D false; + + return 0; +} + +static void hdlc_deinit(struct gb_beagleplay *bg) +{ + flush_work(&bg->tx_work); +} + +static int gb_tty_receive(struct serdev_device *sd, const unsigned char *d= ata, size_t count) +{ + struct gb_beagleplay *bg =3D serdev_device_get_drvdata(sd); + + return hdlc_rx(bg, data, count); +} + +static void gb_tty_wakeup(struct serdev_device *serdev) +{ + struct gb_beagleplay *bg =3D serdev_device_get_drvdata(serdev); + + schedule_work(&bg->tx_work); +} + +static struct serdev_device_ops gb_beagleplay_ops =3D { + .receive_buf =3D gb_tty_receive, + .write_wakeup =3D gb_tty_wakeup, +}; + +static int gb_message_send(struct gb_host_device *hd, u16 cport, struct gb= _message *msg, gfp_t mask) +{ + struct gb_beagleplay *bg =3D dev_get_drvdata(&hd->dev); + struct hdlc_payload payloads[2]; + + dev_dbg(&hd->dev, "Sending greybus message with Operation %u, Type: %X on= Cport %u", + msg->header->operation_id, msg->header->type, cport); + + if (msg->header->size > RX_HDLC_PAYLOAD) + return dev_err_probe(&hd->dev, -E2BIG, "Greybus message too big"); + + memcpy(msg->header->pad, &cport, sizeof(cport)); + + payloads[0].buf =3D msg->header; + payloads[0].len =3D sizeof(*msg->header); + payloads[1].buf =3D msg->payload; + payloads[1].len =3D msg->payload_size; + + hdlc_tx_frames(bg, ADDRESS_GREYBUS, 0x03, payloads, 2); + greybus_message_sent(bg->gb_hd, msg, 0); + + return 0; +} + +static void gb_message_cancel(struct gb_message *message) +{ +} + +static struct gb_hd_driver gb_hdlc_driver =3D { .message_send =3D gb_messa= ge_send, + .message_cancel =3D gb_message_cancel }; + +static void gb_beagleplay_start_svc(struct gb_beagleplay *bg) +{ + const u8 command =3D CONTROL_SVC_START; + const struct hdlc_payload payload =3D { .len =3D 1, .buf =3D (void *)&com= mand }; + + hdlc_tx_frames(bg, ADDRESS_CONTROL, 0x03, &payload, 1); +} + +static void gb_beagleplay_stop_svc(struct gb_beagleplay *bg) +{ + const u8 command =3D CONTROL_SVC_STOP; + const struct hdlc_payload payload =3D { .len =3D 1, .buf =3D (void *)&com= mand }; + + hdlc_tx_frames(bg, ADDRESS_CONTROL, 0x03, &payload, 1); +} + +static void gb_greybus_deinit(struct gb_beagleplay *bg) +{ + gb_hd_del(bg->gb_hd); + gb_hd_put(bg->gb_hd); +} + +static int gb_greybus_init(struct gb_beagleplay *bg) +{ + int ret; + + bg->gb_hd =3D gb_hd_create(&gb_hdlc_driver, &bg->sd->dev, TX_CIRC_BUF_SIZ= E, GB_MAX_CPORTS); + if (IS_ERR(bg->gb_hd)) { + dev_err(&bg->sd->dev, "Failed to create greybus host device"); + return PTR_ERR(bg->gb_hd); + } + + ret =3D gb_hd_add(bg->gb_hd); + if (ret) { + dev_err(&bg->sd->dev, "Failed to add greybus host device"); + goto free_gb_hd; + } + dev_set_drvdata(&bg->gb_hd->dev, bg); + + return 0; + +free_gb_hd: + gb_greybus_deinit(bg); + return ret; +} + +static void gb_serdev_deinit(struct gb_beagleplay *bg) +{ + serdev_device_close(bg->sd); +} + +static int gb_serdev_init(struct gb_beagleplay *bg) +{ + int ret; + + serdev_device_set_drvdata(bg->sd, bg); + serdev_device_set_client_ops(bg->sd, &gb_beagleplay_ops); + ret =3D serdev_device_open(bg->sd); + if (ret) + return dev_err_probe(&bg->sd->dev, ret, "Unable to open serial device"); + + serdev_device_set_baudrate(bg->sd, 115200); + serdev_device_set_flow_control(bg->sd, false); + + return 0; +} + +static int gb_beagleplay_probe(struct serdev_device *serdev) +{ + int ret =3D 0; + struct gb_beagleplay *bg; + + bg =3D devm_kmalloc(&serdev->dev, sizeof(*bg), GFP_KERNEL); + if (!bg) + return -ENOMEM; + + bg->sd =3D serdev; + ret =3D gb_serdev_init(bg); + if (ret) + return ret; + + ret =3D hdlc_init(bg); + if (ret) + goto free_serdev; + + ret =3D gb_greybus_init(bg); + if (ret) + goto free_hdlc; + + gb_beagleplay_start_svc(bg); + + return 0; + +free_hdlc: + hdlc_deinit(bg); +free_serdev: + gb_serdev_deinit(bg); + return ret; +} + +static void gb_beagleplay_remove(struct serdev_device *serdev) +{ + struct gb_beagleplay *bg =3D serdev_device_get_drvdata(serdev); + + gb_greybus_deinit(bg); + gb_beagleplay_stop_svc(bg); + hdlc_deinit(bg); + gb_serdev_deinit(bg); +} + +static const struct of_device_id gb_beagleplay_of_match[] =3D { + { + .compatible =3D "ti,cc1352p7", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, gb_beagleplay_of_match); + +static struct serdev_device_driver gb_beagleplay_driver =3D { + .probe =3D gb_beagleplay_probe, + .remove =3D gb_beagleplay_remove, + .driver =3D { + .name =3D "gb_beagleplay", + .of_match_table =3D gb_beagleplay_of_match, + }, +}; + +module_serdev_device_driver(gb_beagleplay_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ayush Singh "); +MODULE_DESCRIPTION("A Greybus driver for BeaglePlay"); --=20 2.41.0 From nobody Fri Jan 2 00:41:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8863CDB474 for ; Tue, 17 Oct 2023 10:11:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343661AbjJQKLo (ORCPT ); Tue, 17 Oct 2023 06:11:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343649AbjJQKLi (ORCPT ); Tue, 17 Oct 2023 06:11:38 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3B88FA; 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Tue, 17 Oct 2023 03:11:35 -0700 (PDT) From: Ayush Singh To: greybus-dev@lists.linaro.org Cc: Ayush Singh , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, vaishnav@beagleboard.org, jkridner@beagleboard.org, nm@ti.com, krzysztof.kozlowski+dt@linaro.org, vigneshr@ti.com, kristo@kernel.org, robh+dt@kernel.org, conor+dt@kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 3/3] dts: ti: k3-am625-beagleplay: Add beaglecc1352 Date: Tue, 17 Oct 2023 15:41:14 +0530 Message-ID: <20231017101116.178041-4-ayushdevel1325@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231017101116.178041-1-ayushdevel1325@gmail.com> References: <20231017101116.178041-1-ayushdevel1325@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The BeaglePlay board by BeagleBoard.org has a CC1352P7 co-processor connected to the main AM62 (running Linux) over UART. In the BeagleConnect Technology, CC1352 is responsible for handling 6LoWPAN communication with beagleconnect freedom nodes as well as their discovery. This mcu is used by gb-beagleplay, a Greybus driver for BeaglePlay. Signed-off-by: Ayush Singh --- arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts b/arch/arm64/bo= ot/dts/ti/k3-am625-beagleplay.dts index 7cfdf562b53b..d2e0b11242b6 100644 --- a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts +++ b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts @@ -870,6 +870,12 @@ &main_uart6 { pinctrl-names =3D "default"; pinctrl-0 =3D <&wifi_debug_uart_pins_default>; status =3D "okay"; + + mcu { + compatible =3D "ti,cc1352p7"; + reset-gpios =3D <&main_gpio0 72 GPIO_ACTIVE_LOW>; + vdds-supply =3D <&vdd_3v3>; + }; }; =20 &dss { --=20 2.41.0