144 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * RapidIO configuration space access support4 *5 * Copyright 2005 MontaVista Software, Inc.6 * Matt Porter <mporter@kernel.crashing.org>7 */8 9#include <linux/rio.h>10#include <linux/module.h>11 12#include <linux/rio_drv.h>13 14/*15 * Wrappers for all RIO configuration access functions. They just check16 * alignment and call the low-level functions pointed to by rio_mport->ops.17 */18 19#define RIO_8_BAD 020#define RIO_16_BAD (offset & 1)21#define RIO_32_BAD (offset & 3)22 23/**24 * RIO_LOP_READ - Generate rio_local_read_config_* functions25 * @size: Size of configuration space read (8, 16, 32 bits)26 * @type: C type of value argument27 * @len: Length of configuration space read (1, 2, 4 bytes)28 *29 * Generates rio_local_read_config_* functions used to access30 * configuration space registers on the local device.31 */32#define RIO_LOP_READ(size,type,len) \33int __rio_local_read_config_##size \34 (struct rio_mport *mport, u32 offset, type *value) \35{ \36 int res; \37 u32 data = 0; \38 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \39 res = mport->ops->lcread(mport, mport->id, offset, len, &data); \40 *value = (type)data; \41 return res; \42}43 44/**45 * RIO_LOP_WRITE - Generate rio_local_write_config_* functions46 * @size: Size of configuration space write (8, 16, 32 bits)47 * @type: C type of value argument48 * @len: Length of configuration space write (1, 2, 4 bytes)49 *50 * Generates rio_local_write_config_* functions used to access51 * configuration space registers on the local device.52 */53#define RIO_LOP_WRITE(size,type,len) \54int __rio_local_write_config_##size \55 (struct rio_mport *mport, u32 offset, type value) \56{ \57 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \58 return mport->ops->lcwrite(mport, mport->id, offset, len, value);\59}60 61RIO_LOP_READ(8, u8, 1)62RIO_LOP_READ(16, u16, 2)63RIO_LOP_READ(32, u32, 4)64RIO_LOP_WRITE(8, u8, 1)65RIO_LOP_WRITE(16, u16, 2)66RIO_LOP_WRITE(32, u32, 4)67 68EXPORT_SYMBOL_GPL(__rio_local_read_config_8);69EXPORT_SYMBOL_GPL(__rio_local_read_config_16);70EXPORT_SYMBOL_GPL(__rio_local_read_config_32);71EXPORT_SYMBOL_GPL(__rio_local_write_config_8);72EXPORT_SYMBOL_GPL(__rio_local_write_config_16);73EXPORT_SYMBOL_GPL(__rio_local_write_config_32);74 75/**76 * RIO_OP_READ - Generate rio_mport_read_config_* functions77 * @size: Size of configuration space read (8, 16, 32 bits)78 * @type: C type of value argument79 * @len: Length of configuration space read (1, 2, 4 bytes)80 *81 * Generates rio_mport_read_config_* functions used to access82 * configuration space registers on the local device.83 */84#define RIO_OP_READ(size,type,len) \85int rio_mport_read_config_##size \86 (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type *value) \87{ \88 int res; \89 u32 data = 0; \90 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \91 res = mport->ops->cread(mport, mport->id, destid, hopcount, offset, len, &data); \92 *value = (type)data; \93 return res; \94}95 96/**97 * RIO_OP_WRITE - Generate rio_mport_write_config_* functions98 * @size: Size of configuration space write (8, 16, 32 bits)99 * @type: C type of value argument100 * @len: Length of configuration space write (1, 2, 4 bytes)101 *102 * Generates rio_mport_write_config_* functions used to access103 * configuration space registers on the local device.104 */105#define RIO_OP_WRITE(size,type,len) \106int rio_mport_write_config_##size \107 (struct rio_mport *mport, u16 destid, u8 hopcount, u32 offset, type value) \108{ \109 if (RIO_##size##_BAD) return RIO_BAD_SIZE; \110 return mport->ops->cwrite(mport, mport->id, destid, hopcount, \111 offset, len, value); \112}113 114RIO_OP_READ(8, u8, 1)115RIO_OP_READ(16, u16, 2)116RIO_OP_READ(32, u32, 4)117RIO_OP_WRITE(8, u8, 1)118RIO_OP_WRITE(16, u16, 2)119RIO_OP_WRITE(32, u32, 4)120 121EXPORT_SYMBOL_GPL(rio_mport_read_config_8);122EXPORT_SYMBOL_GPL(rio_mport_read_config_16);123EXPORT_SYMBOL_GPL(rio_mport_read_config_32);124EXPORT_SYMBOL_GPL(rio_mport_write_config_8);125EXPORT_SYMBOL_GPL(rio_mport_write_config_16);126EXPORT_SYMBOL_GPL(rio_mport_write_config_32);127 128/**129 * rio_mport_send_doorbell - Send a doorbell message130 *131 * @mport: RIO master port132 * @destid: RIO device destination ID133 * @data: Doorbell message data134 *135 * Send a doorbell message to a RIO device. The doorbell message136 * has a 16-bit info field provided by the data argument.137 */138int rio_mport_send_doorbell(struct rio_mport *mport, u16 destid, u16 data)139{140 return mport->ops->dsend(mport, mport->id, destid, data);141}142 143EXPORT_SYMBOL_GPL(rio_mport_send_doorbell);144