kernel-fxtec-pro1x/drivers/char/xillybus/xillybus_of.c
Eli Billauer 7051924f77 xillybus: Move out of staging
This driver has been functional and stable throughout the year it has spent
in the staging area. It has been patched for minor bugs, coding style issues
and improvements during this period.

This is the second submission of this move-out, after making several style
improvements, as suggested by Dan Carpenter.

Signed-off-by: Eli Billauer <eli.billauer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-23 23:44:16 -07:00

187 lines
4.4 KiB
C

/*
* linux/drivers/misc/xillybus_of.c
*
* Copyright 2011 Xillybus Ltd, http://xillybus.com
*
* Driver for the Xillybus FPGA/host framework using Open Firmware.
*
* This program is free software; you can redistribute it and/or modify
* it under the smems of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/err.h>
#include "xillybus.h"
MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
MODULE_VERSION("1.06");
MODULE_ALIAS("xillybus_of");
MODULE_LICENSE("GPL v2");
static const char xillyname[] = "xillybus_of";
/* Match table for of_platform binding */
static struct of_device_id xillybus_of_match[] = {
{ .compatible = "xillybus,xillybus-1.00.a", },
{ .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */
{}
};
MODULE_DEVICE_TABLE(of, xillybus_of_match);
static void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep,
dma_addr_t dma_handle,
size_t size,
int direction)
{
dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction);
}
static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep,
dma_addr_t dma_handle,
size_t size,
int direction)
{
dma_sync_single_for_device(ep->dev, dma_handle, size, direction);
}
static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep,
dma_addr_t dma_handle,
size_t size,
int direction)
{
}
static void xilly_of_unmap(void *ptr)
{
struct xilly_mapping *data = ptr;
dma_unmap_single(data->device, data->dma_addr,
data->size, data->direction);
kfree(ptr);
}
static int xilly_map_single_of(struct xilly_endpoint *ep,
void *ptr,
size_t size,
int direction,
dma_addr_t *ret_dma_handle
)
{
dma_addr_t addr;
struct xilly_mapping *this;
int rc;
this = kzalloc(sizeof(*this), GFP_KERNEL);
if (!this)
return -ENOMEM;
addr = dma_map_single(ep->dev, ptr, size, direction);
if (dma_mapping_error(ep->dev, addr)) {
kfree(this);
return -ENODEV;
}
this->device = ep->dev;
this->dma_addr = addr;
this->size = size;
this->direction = direction;
*ret_dma_handle = addr;
rc = devm_add_action(ep->dev, xilly_of_unmap, this);
if (rc) {
dma_unmap_single(ep->dev, addr, size, direction);
kfree(this);
return rc;
}
return 0;
}
static struct xilly_endpoint_hardware of_hw = {
.owner = THIS_MODULE,
.hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of,
.hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of,
.map_single = xilly_map_single_of,
};
static struct xilly_endpoint_hardware of_hw_coherent = {
.owner = THIS_MODULE,
.hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop,
.hw_sync_sgl_for_device = xilly_dma_sync_single_nop,
.map_single = xilly_map_single_of,
};
static int xilly_drv_probe(struct platform_device *op)
{
struct device *dev = &op->dev;
struct xilly_endpoint *endpoint;
int rc;
int irq;
struct resource res;
struct xilly_endpoint_hardware *ephw = &of_hw;
if (of_property_read_bool(dev->of_node, "dma-coherent"))
ephw = &of_hw_coherent;
endpoint = xillybus_init_endpoint(NULL, dev, ephw);
if (!endpoint)
return -ENOMEM;
dev_set_drvdata(dev, endpoint);
rc = of_address_to_resource(dev->of_node, 0, &res);
endpoint->registers = devm_ioremap_resource(dev, &res);
if (IS_ERR(endpoint->registers))
return PTR_ERR(endpoint->registers);
irq = irq_of_parse_and_map(dev->of_node, 0);
rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
if (rc) {
dev_err(endpoint->dev,
"Failed to register IRQ handler. Aborting.\n");
return -ENODEV;
}
return xillybus_endpoint_discovery(endpoint);
}
static int xilly_drv_remove(struct platform_device *op)
{
struct device *dev = &op->dev;
struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
xillybus_endpoint_remove(endpoint);
return 0;
}
static struct platform_driver xillybus_platform_driver = {
.probe = xilly_drv_probe,
.remove = xilly_drv_remove,
.driver = {
.name = xillyname,
.owner = THIS_MODULE,
.of_match_table = xillybus_of_match,
},
};
module_platform_driver(xillybus_platform_driver);