From patchwork Tue Jan 29 05:01:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Andreas_F=C3=A4rber?= X-Patchwork-Id: 10785439 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 637C714E1 for ; Tue, 29 Jan 2019 05:02:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 50EC72B2EE for ; Tue, 29 Jan 2019 05:02:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 41C952B4F4; Tue, 29 Jan 2019 05:02:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 729E62B2EE for ; Tue, 29 Jan 2019 05:02:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725794AbfA2FBp (ORCPT ); Tue, 29 Jan 2019 00:01:45 -0500 Received: from mx2.suse.de ([195.135.220.15]:53388 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725308AbfA2FBo (ORCPT ); Tue, 29 Jan 2019 00:01:44 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 8D09FADFF; Tue, 29 Jan 2019 05:01:42 +0000 (UTC) From: =?utf-8?q?Andreas_F=C3=A4rber?= To: linux-lpwan@lists.infradead.org, linux-wpan@vger.kernel.org Cc: Alexander Aring , Stefan Schmidt , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, support@enocean.com, =?utf-8?q?Andreas_F?= =?utf-8?q?=C3=A4rber?= Subject: [RFC net-next 4/4] net: enocean: Prepare ESP2 support Date: Tue, 29 Jan 2019 06:01:30 +0100 Message-Id: <20190129050130.10932-5-afaerber@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190129050130.10932-1-afaerber@suse.de> References: <20190129050130.10932-1-afaerber@suse.de> MIME-Version: 1.0 Sender: linux-wpan-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The EnOcean Serial Protocol 2 used subtelegram frames different from ESP3. It also uses ORG identifiers differing from RORG identifiers in ERP. Only checksumming has been tested. Signed-off-by: Andreas Färber --- drivers/net/enocean/Makefile | 1 + drivers/net/enocean/enocean_esp.c | 10 ++ drivers/net/enocean/enocean_esp.h | 8 ++ drivers/net/enocean/enocean_esp2.c | 276 +++++++++++++++++++++++++++++++++++++ 4 files changed, 295 insertions(+) create mode 100644 drivers/net/enocean/enocean_esp2.c diff --git a/drivers/net/enocean/Makefile b/drivers/net/enocean/Makefile index 4492e3d48c0a..f34b098997e4 100644 --- a/drivers/net/enocean/Makefile +++ b/drivers/net/enocean/Makefile @@ -3,4 +3,5 @@ enocean-dev-y := enocean.o obj-m += enocean-esp.o enocean-esp-y := enocean_esp.o +enocean-esp-y += enocean_esp2.o enocean-esp-y += enocean_esp3.o diff --git a/drivers/net/enocean/enocean_esp.c b/drivers/net/enocean/enocean_esp.c index 61bddb77762d..74720da49369 100644 --- a/drivers/net/enocean/enocean_esp.c +++ b/drivers/net/enocean/enocean_esp.c @@ -150,6 +150,15 @@ static void enocean_esp_cleanup(struct enocean_device *edev) edev->version->cleanup(edev); } +static const struct enocean_esp_version enocean_esp2 = { + .version = 2, + .baudrate = 9600, + .serdev_client_ops = &enocean_esp2_serdev_client_ops, + .init = enocean_esp2_init, + .send = enocean_esp2_send, + .cleanup = enocean_esp2_cleanup, +}; + static const struct enocean_esp_version enocean_esp3 = { .version = 3, .baudrate = 57600, @@ -160,6 +169,7 @@ static const struct enocean_esp_version enocean_esp3 = { }; static const struct of_device_id enocean_of_match[] = { + { .compatible = "enocean,esp2", .data = &enocean_esp2 }, { .compatible = "enocean,esp3", .data = &enocean_esp3 }, {} }; diff --git a/drivers/net/enocean/enocean_esp.h b/drivers/net/enocean/enocean_esp.h index e02bf5352d61..44660238043a 100644 --- a/drivers/net/enocean/enocean_esp.h +++ b/drivers/net/enocean/enocean_esp.h @@ -24,15 +24,23 @@ struct enocean_device { void *priv; }; +extern const struct serdev_device_ops enocean_esp2_serdev_client_ops; extern const struct serdev_device_ops enocean_esp3_serdev_client_ops; void enocean_esp3_crc8_populate(void); +int enocean_esp2_init(struct enocean_device *edev); int enocean_esp3_init(struct enocean_device *edev); +int enocean_esp2_send(struct enocean_device *edev, u32 dest, const void *data, int data_len); int enocean_esp3_send(struct enocean_device *edev, u32 dest, const void *data, int data_len); void enocean_esp_tx_done(struct enocean_device *edev); +void enocean_esp2_cleanup(struct enocean_device *edev); void enocean_esp3_cleanup(struct enocean_device *edev); +#define ENOCEAN_RORG_RPS 0xF6 +#define ENOCEAN_RORG_1BS 0xD5 +#define ENOCEAN_RORG_4BS 0xA5 + #endif diff --git a/drivers/net/enocean/enocean_esp2.c b/drivers/net/enocean/enocean_esp2.c new file mode 100644 index 000000000000..d4cb787de22e --- /dev/null +++ b/drivers/net/enocean/enocean_esp2.c @@ -0,0 +1,276 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * EnOcean Serial Protocol 2 + * + * Copyright (c) 2019 Andreas Färber + */ + +#include + +#include "enocean_esp.h" + +#define ESP2_SYNC_BYTE1 0xA5 +#define ESP2_SYNC_BYTE0 0x5A + +struct enocean_esp2_packet { + u8 sync[2]; +#ifdef CONFIG_CPU_BIG_ENDIAN + u8 h_seq:3; + u8 length:5; +#else + u8 length:5; + u8 h_seq:3; +#endif + u8 org; + u8 data[4]; + u8 id[4]; + u8 status; + u8 checksum; +} __packed; + +#define ESP2_H_SEQ_TRT 0x3 +#define ESP2_H_SEQ_RCT 0x4 +#define ESP2_H_SEQ_TCT 0x5 + +#define ESP2_TELEGRAM_RESET 0x0A + +#define ENOCEAN_ORG_RPS 0x05 +#define ENOCEAN_ORG_1BS 0x06 +#define ENOCEAN_ORG_4BS 0x07 + +/* Cf. EnOcean Equipment Profiles, Telegram Types (RORG) */ +static inline u8 enocean_org_to_rorg(u8 org) +{ + switch (org) { + case ENOCEAN_ORG_RPS: + return ENOCEAN_RORG_RPS; + case ENOCEAN_ORG_1BS: + return ENOCEAN_RORG_1BS; + case ENOCEAN_ORG_4BS: + return ENOCEAN_RORG_4BS; + default: + return org; + } +} + +static u8 enocean_rorg_to_org(u8 rorg) +{ + switch (rorg) { + case ENOCEAN_RORG_RPS: + return ENOCEAN_ORG_RPS; + case ENOCEAN_RORG_1BS: + return ENOCEAN_ORG_1BS; + case ENOCEAN_RORG_4BS: + return ENOCEAN_ORG_4BS; + default: + return rorg; + } +} + +struct enocean_esp2_dispatcher { + struct list_head list; + u8 h_seq; + void (*dispatch)(const u8 *data, u8 data_len, struct enocean_esp2_dispatcher *d); +}; + +static void enocean_add_esp2_dispatcher(struct enocean_device *edev, + struct enocean_esp2_dispatcher *entry) +{ + list_add_tail_rcu(&entry->list, &edev->esp_dispatchers); +} + +static void enocean_remove_esp2_dispatcher(struct enocean_device *edev, + struct enocean_esp2_dispatcher *entry) +{ + list_del_rcu(&entry->list); +} + +#define ESP2_RESPONSE_ERR_SYNTAX_H_SEQ 0x08 +#define ESP2_RESPONSE_ERR_SYNTAX_LENGTH 0x09 +#define ESP2_RESPONSE_ERR_SYNTAX_CHKSUM 0x0A +#define ESP2_RESPONSE_ERR_SYNTAX_ORG 0x0B +#define ESP2_RESPONSE_ERR 0x19 +#define ESP2_RESPONSE_ERR_IDRANGE 0x1A +#define ESP2_RESPONSE_ERR_TX_IDRANGE 0x22 +#define ESP2_RESPONSE_OK 0x58 + +struct enocean_esp2_priv { + struct enocean_device *edev; + struct enocean_esp2_dispatcher tx_telegram_response; +}; + +static u8 enocean_esp2_checksum(const u8 *data, int len) +{ + u8 chksum = 0; + int i; + + for (i = 0; i < len; i++) { + chksum += data[i]; + } + return chksum; +} + +static int enocean_esp2_send_telegram(struct enocean_device *edev, u8 h_seq, u8 org, + const u8 *data, int data_len, unsigned long timeout) +{ + struct enocean_esp2_packet pkt; + int ret; + + memset(&pkt, 0, sizeof(pkt)); + pkt.sync[0] = ESP2_SYNC_BYTE1; + pkt.sync[1] = ESP2_SYNC_BYTE0; + pkt.h_seq = h_seq; + pkt.length = 11; + dev_dbg(&edev->serdev->dev, "H_SEQ | LENGTH = %02x\n", (unsigned int)(((u8*)&pkt)[2])); + pkt.org = org; + if (data_len > 0) + memcpy(pkt.data, data, min(data_len, 9)); + pkt.checksum = enocean_esp2_checksum(((u8 *)&pkt) + 2, sizeof(pkt) - 2 - 1); + dev_dbg(&edev->serdev->dev, "checksum = %02x\n", (unsigned int)pkt.checksum); + + ret = serdev_device_write(edev->serdev, (const u8 *)&pkt, sizeof(pkt), timeout); + if (ret < 0) + return ret; + if (ret > 0 && ret < sizeof(pkt)) + return -EIO; + return 0; +} + +static void enocean_esp2_tx_telegram_response_dispatch(const u8 *data, u8 data_len, + struct enocean_esp2_dispatcher *d) +{ + struct enocean_esp2_priv *priv = container_of(d, struct enocean_esp2_priv, tx_telegram_response); + struct enocean_device *edev = priv->edev; + + enocean_remove_esp2_dispatcher(edev, d); + + if (data_len < 1) + return; + + switch (data[0]) { + case ESP2_RESPONSE_OK: + enocean_esp_tx_done(edev); + break; + case ESP2_RESPONSE_ERR: + case ESP2_RESPONSE_ERR_TX_IDRANGE: + default: + break; + } +} + +static int enocean_esp2_tx_telegram(struct enocean_device *edev, u8 org, + const u8 *data, int data_len, unsigned long timeout) +{ + struct enocean_esp2_priv *priv = edev->priv; + int ret; + + enocean_add_esp2_dispatcher(edev, &priv->tx_telegram_response); + + ret = enocean_esp2_send_telegram(edev, ESP2_H_SEQ_TRT, + org, data, data_len, timeout); + if (ret) { + enocean_remove_esp2_dispatcher(edev, &priv->tx_telegram_response); + return ret; + } + + return 0; +} + +static int enocean_esp2_reset(struct enocean_device *edev, unsigned long timeout) +{ + return enocean_esp2_send_telegram(edev, ESP2_H_SEQ_TCT, ESP2_TELEGRAM_RESET, NULL, 0, timeout); + /* no RCT */ +} + +static int enocean_esp2_receive_buf(struct serdev_device *sdev, const u8 *data, size_t count) +{ + struct enocean_device *edev = serdev_device_get_drvdata(sdev); + struct enocean_esp2_dispatcher *e; + u8 h_seq, length, chksum; + + dev_dbg(&sdev->dev, "Receive (%zu)\n", count); + + if (data[0] != ESP2_SYNC_BYTE1) { + dev_warn(&sdev->dev, "not first Sync Byte (found 0x%02x), skipping\n", + (unsigned int)data[0]); + return 1; + } + + if (count < 2) + return 0; + + if (data[1] != ESP2_SYNC_BYTE0) { + dev_warn(&sdev->dev, "not second Sync Byte (found 0x%02x 0x%02x), skipping\n", + ESP2_SYNC_BYTE1, (unsigned int)data[1]); + return 1; + } + + if (count < 3) + return 0; + + h_seq = data[2] >> 5; + length = data[2] & 0x1f; + + if (count < 3 + length) + return 0; + + chksum = enocean_esp2_checksum(data + 2, 1 + length - 1); + if (data[3 + length - 1] != chksum) { + dev_warn(&sdev->dev, "invalid checksum (expected 0x%02x, found %02x), skipping\n", + (unsigned int)chksum, (unsigned int)data[3 + length - 1]); + return 2; /* valid second Sync Byte is not a valid first Sync Byte */ + } + + print_hex_dump_bytes("received: ", DUMP_PREFIX_OFFSET, data, 3 + length); + + list_for_each_entry_rcu(e, &edev->esp_dispatchers, list) { + if (e->h_seq == h_seq) + e->dispatch(data + 3, length, e); + } + + return 3 + length; +} + +const struct serdev_device_ops enocean_esp2_serdev_client_ops = { + .receive_buf = enocean_esp2_receive_buf, + .write_wakeup = serdev_device_write_wakeup, +}; + +int enocean_esp2_send(struct enocean_device *edev, u32 dest, const void *data, int data_len) +{ + const u8 *buf = data; + + return enocean_esp2_tx_telegram(edev, + enocean_rorg_to_org(buf[0]), buf + 1, data_len - 1, HZ); +} + +int enocean_esp2_init(struct enocean_device *edev) +{ + struct enocean_esp2_priv *priv; + int ret; + + ret = enocean_esp2_reset(edev, HZ); + if (ret) + return ret; + + msleep(100); /* XXX */ + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->edev = edev; + edev->priv = priv; + + priv->tx_telegram_response.h_seq = ESP2_H_SEQ_RCT; + priv->tx_telegram_response.dispatch = enocean_esp2_tx_telegram_response_dispatch; + + return 0; +} + +void enocean_esp2_cleanup(struct enocean_device *edev) +{ + struct enocean_esp2_priv *priv = edev->priv; + + kfree(priv); +}