[people/ms/u-boot.git] / drivers / pci / pci_sandbox.c

/*
 * Copyright (c) 2014 Google, Inc
 * Written by Simon Glass <sjg@chromium.org>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <inttypes.h>
#include <pci.h>

DECLARE_GLOBAL_DATA_PTR;

static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
				    uint offset, ulong value,
				    enum pci_size_t size)
{
	struct dm_pci_emul_ops *ops;
	struct udevice *emul;
	int ret;

	ret = sandbox_pci_get_emul(bus, devfn, &emul);
	if (ret)
		return ret == -ENODEV ? 0 : ret;
	ops = pci_get_emul_ops(emul);
	if (!ops || !ops->write_config)
		return -ENOSYS;

	return ops->write_config(emul, offset, value, size);
}

static int sandbox_pci_read_config(struct udevice *bus, pci_dev_t devfn,
				   uint offset, ulong *valuep,
				   enum pci_size_t size)
{
	struct dm_pci_emul_ops *ops;
	struct udevice *emul;
	int ret;

	/* Prepare the default response */
	*valuep = pci_get_ff(size);
	ret = sandbox_pci_get_emul(bus, devfn, &emul);
	if (ret)
		return ret == -ENODEV ? 0 : ret;
	ops = pci_get_emul_ops(emul);
	if (!ops || !ops->read_config)
		return -ENOSYS;

	return ops->read_config(emul, offset, valuep, size);
}

static const struct dm_pci_ops sandbox_pci_ops = {
	.read_config = sandbox_pci_read_config,
	.write_config = sandbox_pci_write_config,
};

static const struct udevice_id sandbox_pci_ids[] = {
	{ .compatible = "sandbox,pci" },
	{ }
};

U_BOOT_DRIVER(pci_sandbox) = {
	.name	= "pci_sandbox",
	.id	= UCLASS_PCI,
	.of_match = sandbox_pci_ids,
	.ops	= &sandbox_pci_ops,

	/* Attach an emulator if we can */
	.child_post_bind = dm_scan_fdt_dev,
	.per_child_platdata_auto_alloc_size =
			sizeof(struct pci_child_platdata),
};
Commit	Line	Data
537849aa SG	1	/*
	2	* Copyright (c) 2014 Google, Inc
	3	* Written by Simon Glass <sjg@chromium.org>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
	8	#include <common.h>
	9	#include <dm.h>
	10	#include <fdtdec.h>
	11	#include <inttypes.h>
	12	#include <pci.h>
537849aa SG	13
	14	DECLARE_GLOBAL_DATA_PTR;
	15
	16	static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
	17	uint offset, ulong value,
	18	enum pci_size_t size)
	19	{
	20	struct dm_pci_emul_ops *ops;
	21	struct udevice *emul;
	22	int ret;
	23
	24	ret = sandbox_pci_get_emul(bus, devfn, &emul);
	25	if (ret)
	26	return ret == -ENODEV ? 0 : ret;
	27	ops = pci_get_emul_ops(emul);
	28	if (!ops \|\| !ops->write_config)
	29	return -ENOSYS;
	30
	31	return ops->write_config(emul, offset, value, size);
	32	}
	33
	34	static int sandbox_pci_read_config(struct udevice *bus, pci_dev_t devfn,
	35	uint offset, ulong *valuep,
	36	enum pci_size_t size)
	37	{
	38	struct dm_pci_emul_ops *ops;
	39	struct udevice *emul;
	40	int ret;
	41
	42	/* Prepare the default response */
	43	*valuep = pci_get_ff(size);
	44	ret = sandbox_pci_get_emul(bus, devfn, &emul);
	45	if (ret)
	46	return ret == -ENODEV ? 0 : ret;
	47	ops = pci_get_emul_ops(emul);
	48	if (!ops \|\| !ops->read_config)
	49	return -ENOSYS;
	50
	51	return ops->read_config(emul, offset, valuep, size);
	52	}
	53
537849aa SG	54	static const struct dm_pci_ops sandbox_pci_ops = {
	55	.read_config = sandbox_pci_read_config,
	56	.write_config = sandbox_pci_write_config,
	57	};
	58
	59	static const struct udevice_id sandbox_pci_ids[] = {
	60	{ .compatible = "sandbox,pci" },
	61	{ }
	62	};
	63
	64	U_BOOT_DRIVER(pci_sandbox) = {
	65	.name = "pci_sandbox",
	66	.id = UCLASS_PCI,
	67	.of_match = sandbox_pci_ids,
	68	.ops = &sandbox_pci_ops,
91195485 SG	69
	70	/* Attach an emulator if we can */
	71	.child_post_bind = dm_scan_fdt_dev,
537849aa SG	72	.per_child_platdata_auto_alloc_size =
	73	sizeof(struct pci_child_platdata),
	74	};