174 lines
4.1 KiB
C
174 lines
4.1 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the smems of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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_VERSION("1.06");
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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 void xilly_dma_sync_single_for_cpu_of(struct xilly_endpoint *ep,
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dma_addr_t dma_handle,
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size_t size,
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int direction)
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{
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dma_sync_single_for_cpu(ep->dev, dma_handle, size, direction);
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}
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static void xilly_dma_sync_single_for_device_of(struct xilly_endpoint *ep,
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dma_addr_t dma_handle,
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size_t size,
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int direction)
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{
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dma_sync_single_for_device(ep->dev, dma_handle, size, direction);
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}
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static void xilly_dma_sync_single_nop(struct xilly_endpoint *ep,
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dma_addr_t dma_handle,
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size_t size,
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int direction)
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{
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}
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static void xilly_of_unmap(void *ptr)
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{
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struct xilly_mapping *data = ptr;
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dma_unmap_single(data->device, data->dma_addr,
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data->size, data->direction);
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kfree(ptr);
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}
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static int xilly_map_single_of(struct xilly_endpoint *ep,
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void *ptr,
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size_t size,
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int direction,
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dma_addr_t *ret_dma_handle
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)
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{
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dma_addr_t addr;
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struct xilly_mapping *this;
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this = kzalloc(sizeof(*this), GFP_KERNEL);
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if (!this)
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return -ENOMEM;
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addr = dma_map_single(ep->dev, ptr, size, direction);
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if (dma_mapping_error(ep->dev, addr)) {
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kfree(this);
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return -ENODEV;
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}
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this->device = ep->dev;
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this->dma_addr = addr;
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this->size = size;
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this->direction = direction;
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*ret_dma_handle = addr;
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return devm_add_action_or_reset(ep->dev, xilly_of_unmap, this);
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}
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static struct xilly_endpoint_hardware of_hw = {
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.owner = THIS_MODULE,
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.hw_sync_sgl_for_cpu = xilly_dma_sync_single_for_cpu_of,
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.hw_sync_sgl_for_device = xilly_dma_sync_single_for_device_of,
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.map_single = xilly_map_single_of,
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};
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static struct xilly_endpoint_hardware of_hw_coherent = {
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.owner = THIS_MODULE,
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.hw_sync_sgl_for_cpu = xilly_dma_sync_single_nop,
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.hw_sync_sgl_for_device = xilly_dma_sync_single_nop,
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.map_single = xilly_map_single_of,
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};
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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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struct resource *res;
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struct xilly_endpoint_hardware *ephw = &of_hw;
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if (of_property_read_bool(dev->of_node, "dma-coherent"))
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ephw = &of_hw_coherent;
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endpoint = xillybus_init_endpoint(NULL, dev, ephw);
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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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res = platform_get_resource(op, IORESOURCE_MEM, 0);
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endpoint->registers = devm_ioremap_resource(dev, res);
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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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