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166 lines
3.9 KiB
166 lines
3.9 KiB
// 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 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 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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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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