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 
25 static 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 
32 static 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 
39 static struct scsi_host_template ahci_platform_sht = {
40 	AHCI_SHT(DRV_NAME),
41 };
42 
ahci_probe(struct platform_device * pdev)43 static 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;
75 disable_resources:
76 	ahci_platform_disable_resources(hpriv);
77 	return rc;
78 }
79 
80 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
81 			 ahci_platform_resume);
82 
83 static 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 };
93 MODULE_DEVICE_TABLE(of, ahci_of_match);
94 
95 static 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 };
100 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
101 
102 static 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 };
113 module_platform_driver(ahci_driver);
114 
115 MODULE_DESCRIPTION("AHCI SATA platform driver");
116 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
117 MODULE_LICENSE("GPL");
118 MODULE_ALIAS("platform:ahci");
119