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c31bbc140b
The driver was originally written with the assumption that a different API must be used for DMA-related functions if the device is PCIe based or if not. Since Xillybus' driver supports devices on a PCIe bus (with xillybus_pcie) as well as connected directly to the processor (with xillybus_of), it originally used wrapper functions that ensure that a different API is used for each. This patch eliminates the said wrapper functions, as all use the same dma_* API now. This is most notable by the code deleted in xillybus_pcie.c and xillybus_of.c. It also eliminates the OF driver's check for a "dma-coherent" attribute in the device's OF entry, since this is taken care of by the kernel's implementation of dma_sync_single_for_*(). There is however still need for one wrapper function, which is merged from xillybus_pcie.c and xillybus_of.c into xillybus_core.c: The call to dma_map_single() is wrapped by a function that uses the Managed Device (devres) framework, in the absence of a relevant function in the current kernel's API. Suggested-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Suggested-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eli Billauer <eli.billauer@gmail.com> Link: https://lore.kernel.org/r/20210929094442.46383-1-eli.billauer@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/drivers/misc/xillybus_of.c
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*
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* Copyright 2011 Xillybus Ltd, http://xillybus.com
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*
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* Driver for the Xillybus FPGA/host framework using Open Firmware.
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/err.h>
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#include "xillybus.h"
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MODULE_DESCRIPTION("Xillybus driver for Open Firmware");
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MODULE_AUTHOR("Eli Billauer, Xillybus Ltd.");
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MODULE_ALIAS("xillybus_of");
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MODULE_LICENSE("GPL v2");
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static const char xillyname[] = "xillybus_of";
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/* Match table for of_platform binding */
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static const struct of_device_id xillybus_of_match[] = {
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{ .compatible = "xillybus,xillybus-1.00.a", },
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{ .compatible = "xlnx,xillybus-1.00.a", }, /* Deprecated */
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{}
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};
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MODULE_DEVICE_TABLE(of, xillybus_of_match);
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static int xilly_drv_probe(struct platform_device *op)
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{
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struct device *dev = &op->dev;
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struct xilly_endpoint *endpoint;
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int rc;
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int irq;
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endpoint = xillybus_init_endpoint(dev);
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if (!endpoint)
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return -ENOMEM;
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dev_set_drvdata(dev, endpoint);
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endpoint->owner = THIS_MODULE;
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endpoint->registers = devm_platform_ioremap_resource(op, 0);
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if (IS_ERR(endpoint->registers))
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return PTR_ERR(endpoint->registers);
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irq = platform_get_irq(op, 0);
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rc = devm_request_irq(dev, irq, xillybus_isr, 0, xillyname, endpoint);
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if (rc) {
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dev_err(endpoint->dev,
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"Failed to register IRQ handler. Aborting.\n");
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return -ENODEV;
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}
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return xillybus_endpoint_discovery(endpoint);
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}
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static int xilly_drv_remove(struct platform_device *op)
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{
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struct device *dev = &op->dev;
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struct xilly_endpoint *endpoint = dev_get_drvdata(dev);
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xillybus_endpoint_remove(endpoint);
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return 0;
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}
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static struct platform_driver xillybus_platform_driver = {
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.probe = xilly_drv_probe,
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.remove = xilly_drv_remove,
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.driver = {
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.name = xillyname,
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.of_match_table = xillybus_of_match,
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},
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};
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module_platform_driver(xillybus_platform_driver);
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