1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * AHCI SATA platform driver
4 *
5 * Copyright 2004-2005  Red Hat, Inc.
6 *   Jeff Garzik <jgarzik@pobox.com>
7 * Copyright 2010  MontaVista Software, LLC.
8 *   Anton Vorontsov <avorontsov@ru.mvista.com>
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/pm.h>
14#include <linux/device.h>
15#include <linux/of_device.h>
16#include <linux/platform_device.h>
17#include <linux/libata.h>
18#include <linux/ahci_platform.h>
19#include <linux/acpi.h>
20#include <linux/pci_ids.h>
21#include "ahci.h"
22
23#define DRV_NAME "ahci"
24
25static const struct ata_port_info ahci_port_info = {
26	.flags		= AHCI_FLAG_COMMON,
27	.pio_mask	= ATA_PIO4,
28	.udma_mask	= ATA_UDMA6,
29	.port_ops	= &ahci_platform_ops,
30};
31
32static const struct ata_port_info ahci_port_info_nolpm = {
33	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
34	.pio_mask	= ATA_PIO4,
35	.udma_mask	= ATA_UDMA6,
36	.port_ops	= &ahci_platform_ops,
37};
38
39static struct scsi_host_template ahci_platform_sht = {
40	AHCI_SHT(DRV_NAME),
41};
42
43static int ahci_probe(struct platform_device *pdev)
44{
45	struct device *dev = &pdev->dev;
46	struct ahci_host_priv *hpriv;
47	const struct ata_port_info *port;
48	int rc;
49
50	hpriv = ahci_platform_get_resources(pdev,
51					    AHCI_PLATFORM_GET_RESETS);
52	if (IS_ERR(hpriv))
53		return PTR_ERR(hpriv);
54
55	rc = ahci_platform_enable_resources(hpriv);
56	if (rc)
57		return rc;
58
59	of_property_read_u32(dev->of_node,
60			     "ports-implemented", &hpriv->force_port_map);
61
62	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
63		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
64
65	port = acpi_device_get_match_data(dev);
66	if (!port)
67		port = &ahci_port_info;
68
69	rc = ahci_platform_init_host(pdev, hpriv, port,
70				     &ahci_platform_sht);
71	if (rc)
72		goto disable_resources;
73
74	return 0;
75disable_resources:
76	ahci_platform_disable_resources(hpriv);
77	return rc;
78}
79
80static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
81			 ahci_platform_resume);
82
83static const struct of_device_id ahci_of_match[] = {
84	{ .compatible = "generic-ahci", },
85	/* Keep the following compatibles for device tree compatibility */
86	{ .compatible = "snps,spear-ahci", },
87	{ .compatible = "ibm,476gtr-ahci", },
88	{ .compatible = "snps,dwc-ahci", },
89	{ .compatible = "hisilicon,hisi-ahci", },
90	{ .compatible = "cavium,octeon-7130-ahci", },
91	{},
92};
93MODULE_DEVICE_TABLE(of, ahci_of_match);
94
95static const struct acpi_device_id ahci_acpi_match[] = {
96	{ "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
97	{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
98	{},
99};
100MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
101
102static struct platform_driver ahci_driver = {
103	.probe = ahci_probe,
104	.remove = ata_platform_remove_one,
105	.shutdown = ahci_platform_shutdown,
106	.driver = {
107		.name = DRV_NAME,
108		.of_match_table = ahci_of_match,
109		.acpi_match_table = ahci_acpi_match,
110		.pm = &ahci_pm_ops,
111	},
112};
113module_platform_driver(ahci_driver);
114
115MODULE_DESCRIPTION("AHCI SATA platform driver");
116MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
117MODULE_LICENSE("GPL");
118MODULE_ALIAS("platform:ahci");
119