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/*
Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
<http://rt2x00.serialmonkey.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/*
Module: rt2x00mmio
Abstract: Data structures for the rt2x00mmio module.
*/
#ifndef RT2X00MMIO_H
#define RT2X00MMIO_H
#include <linux/io.h>
/*
* Register access.
*/
static inline void rt2x00mmio_register_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 *value)
{
*value = readl(rt2x00dev->csr.base + offset);
}
static inline void rt2x00mmio_register_multiread(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
void *value, const u32 length)
{
memcpy_fromio(value, rt2x00dev->csr.base + offset, length);
}
static inline void rt2x00mmio_register_write(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 value)
{
writel(value, rt2x00dev->csr.base + offset);
}
static inline void rt2x00mmio_register_multiwrite(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
const void *value,
const u32 length)
{
__iowrite32_copy(rt2x00dev->csr.base + offset, value, length >> 2);
}
/**
* rt2x00mmio_regbusy_read - Read from register with busy check
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @field: Field to check if register is busy
* @reg: Pointer to where register contents should be stored
*
* This function will read the given register, and checks if the
* register is busy. If it is, it will sleep for a couple of
* microseconds before reading the register again. If the register
* is not read after a certain timeout, this function will return
* FALSE.
*/
int rt2x00mmio_regbusy_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
const struct rt2x00_field32 field,
u32 *reg);
/**
* struct queue_entry_priv_mmio: Per entry PCI specific information
*
* @desc: Pointer to device descriptor
* @desc_dma: DMA pointer to &desc.
* @data: Pointer to device's entry memory.
* @data_dma: DMA pointer to &data.
*/
struct queue_entry_priv_mmio {
__le32 *desc;
dma_addr_t desc_dma;
};
/**
* rt2x00mmio_rxdone - Handle RX done events
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
*
* Returns true if there are still rx frames pending and false if all
* pending rx frames were processed.
*/
bool rt2x00mmio_rxdone(struct rt2x00_dev *rt2x00dev);
/**
* rt2x00mmio_flush_queue - Flush data queue
* @queue: Data queue to stop
* @drop: True to drop all pending frames.
*
* This will wait for a maximum of 100ms, waiting for the queues
* to become empty.
*/
void rt2x00mmio_flush_queue(struct data_queue *queue, bool drop);
/*
* Device initialization handlers.
*/
int rt2x00mmio_initialize(struct rt2x00_dev *rt2x00dev);
void rt2x00mmio_uninitialize(struct rt2x00_dev *rt2x00dev);
#endif /* RT2X00MMIO_H */
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