Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752277AbdDJTre (ORCPT ); Mon, 10 Apr 2017 15:47:34 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:43029 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752099AbdDJTrd (ORCPT ); Mon, 10 Apr 2017 15:47:33 -0400 From: Christopher Bostic To: robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, rostedt@goodmis.org, mingo@redhat.com, gregkh@linuxfoundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Jeremy Kerr , joel@jms.id.au, linux-kernel@vger.kernel.org, andrew@aj.id.au, alistair@popple.id.au, benh@kernel.crashing.org, Chris Bostic Subject: [PATCH v6 01/23] drivers/fsi: Add fsi master definition Date: Mon, 10 Apr 2017 14:46:44 -0500 X-Mailer: git-send-email 2.10.1 (Apple Git-78) In-Reply-To: <20170410194706.64280-1-cbostic@linux.vnet.ibm.com> References: <20170410194706.64280-1-cbostic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17041019-0036-0000-0000-000001D861F9 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006912; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000208; SDB=6.00845690; UDB=6.00417057; IPR=6.00624123; BA=6.00005281; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00014997; XFM=3.00000013; UTC=2017-04-10 19:47:29 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17041019-0037-0000-0000-00003F9919F2 Message-Id: <20170410194706.64280-2-cbostic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-04-10_15:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1704100156 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3436 Lines: 117 From: Jeremy Kerr Add a `struct fsi_master` to represent a FSI master controller. FSI master drivers register one of these structs to provide device-specific of the standard operations: read/write/term/break and link control. Includes changes from Edward A. James & Jeremy Kerr . Signed-off-by: Jeremy Kerr Signed-off-by: Chris Bostic Signed-off-by: Joel Stanley --- drivers/fsi/fsi-core.c | 35 +++++++++++++++++++++++++++++++++++ drivers/fsi/fsi-master.h | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 76 insertions(+) create mode 100644 drivers/fsi/fsi-master.h diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 3d55bd5..ca02913 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -15,8 +15,43 @@ #include #include +#include #include +#include "fsi-master.h" + +static DEFINE_IDA(master_ida); + +/* FSI master support */ +int fsi_master_register(struct fsi_master *master) +{ + int rc; + + if (!master) + return -EINVAL; + + master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL); + dev_set_name(&master->dev, "fsi%d", master->idx); + + rc = device_register(&master->dev); + if (rc) + ida_simple_remove(&master_ida, master->idx); + + return rc; +} +EXPORT_SYMBOL_GPL(fsi_master_register); + +void fsi_master_unregister(struct fsi_master *master) +{ + if (master->idx >= 0) { + ida_simple_remove(&master_ida, master->idx); + master->idx = -1; + } + + device_unregister(&master->dev); +} +EXPORT_SYMBOL_GPL(fsi_master_unregister); + /* FSI core & Linux bus type definitions */ static int fsi_bus_match(struct device *dev, struct device_driver *drv) diff --git a/drivers/fsi/fsi-master.h b/drivers/fsi/fsi-master.h new file mode 100644 index 0000000..7764b00 --- /dev/null +++ b/drivers/fsi/fsi-master.h @@ -0,0 +1,41 @@ +/* + * FSI master definitions. These comprise the core <--> master interface, + * to allow the core to interact with the (hardware-specific) masters. + * + * Copyright (C) IBM Corporation 2016 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef DRIVERS_FSI_MASTER_H +#define DRIVERS_FSI_MASTER_H + +#include + +struct fsi_master { + struct device dev; + int idx; + int n_links; + int flags; + int (*read)(struct fsi_master *, int link, uint8_t id, + uint32_t addr, void *val, size_t size); + int (*write)(struct fsi_master *, int link, uint8_t id, + uint32_t addr, const void *val, size_t size); + int (*term)(struct fsi_master *, int link, uint8_t id); + int (*send_break)(struct fsi_master *, int link); + int (*link_enable)(struct fsi_master *, int link); +}; + +#define dev_to_fsi_master(d) container_of(d, struct fsi_master, dev) + +extern int fsi_master_register(struct fsi_master *master); +extern void fsi_master_unregister(struct fsi_master *master); + +#endif /* DRIVERS_FSI_MASTER_H */ -- 1.8.2.2