xref: /openbmc/linux/drivers/ata/ahci_platform.c (revision e657c18a)
1 /*
2  * AHCI SATA platform driver
3  *
4  * Copyright 2004-2005  Red Hat, Inc.
5  *   Jeff Garzik <jgarzik@pobox.com>
6  * Copyright 2010  MontaVista Software, LLC.
7  *   Anton Vorontsov <avorontsov@ru.mvista.com>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2, or (at your option)
12  * any later version.
13  */
14 
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/pm.h>
18 #include <linux/device.h>
19 #include <linux/of_device.h>
20 #include <linux/platform_device.h>
21 #include <linux/libata.h>
22 #include <linux/ahci_platform.h>
23 #include <linux/acpi.h>
24 #include <linux/pci_ids.h>
25 #include "ahci.h"
26 
27 #define DRV_NAME "ahci"
28 
29 static const struct ata_port_info ahci_port_info = {
30 	.flags		= AHCI_FLAG_COMMON,
31 	.pio_mask	= ATA_PIO4,
32 	.udma_mask	= ATA_UDMA6,
33 	.port_ops	= &ahci_platform_ops,
34 };
35 
36 static const struct ata_port_info ahci_port_info_nolpm = {
37 	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
38 	.pio_mask	= ATA_PIO4,
39 	.udma_mask	= ATA_UDMA6,
40 	.port_ops	= &ahci_platform_ops,
41 };
42 
43 static struct scsi_host_template ahci_platform_sht = {
44 	AHCI_SHT(DRV_NAME),
45 };
46 
47 static int ahci_probe(struct platform_device *pdev)
48 {
49 	struct device *dev = &pdev->dev;
50 	struct ahci_host_priv *hpriv;
51 	const struct ata_port_info *port;
52 	int rc;
53 
54 	hpriv = ahci_platform_get_resources(pdev,
55 					    AHCI_PLATFORM_GET_RESETS);
56 	if (IS_ERR(hpriv))
57 		return PTR_ERR(hpriv);
58 
59 	rc = ahci_platform_enable_resources(hpriv);
60 	if (rc)
61 		return rc;
62 
63 	of_property_read_u32(dev->of_node,
64 			     "ports-implemented", &hpriv->force_port_map);
65 
66 	if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
67 		hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
68 
69 	port = acpi_device_get_match_data(dev);
70 	if (!port)
71 		port = &ahci_port_info;
72 
73 	rc = ahci_platform_init_host(pdev, hpriv, port,
74 				     &ahci_platform_sht);
75 	if (rc)
76 		goto disable_resources;
77 
78 	return 0;
79 disable_resources:
80 	ahci_platform_disable_resources(hpriv);
81 	return rc;
82 }
83 
84 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
85 			 ahci_platform_resume);
86 
87 static const struct of_device_id ahci_of_match[] = {
88 	{ .compatible = "generic-ahci", },
89 	/* Keep the following compatibles for device tree compatibility */
90 	{ .compatible = "snps,spear-ahci", },
91 	{ .compatible = "ibm,476gtr-ahci", },
92 	{ .compatible = "snps,dwc-ahci", },
93 	{ .compatible = "hisilicon,hisi-ahci", },
94 	{ .compatible = "cavium,octeon-7130-ahci", },
95 	{},
96 };
97 MODULE_DEVICE_TABLE(of, ahci_of_match);
98 
99 static const struct acpi_device_id ahci_acpi_match[] = {
100 	{ "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
101 	{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
102 	{},
103 };
104 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
105 
106 static struct platform_driver ahci_driver = {
107 	.probe = ahci_probe,
108 	.remove = ata_platform_remove_one,
109 	.shutdown = ahci_platform_shutdown,
110 	.driver = {
111 		.name = DRV_NAME,
112 		.of_match_table = ahci_of_match,
113 		.acpi_match_table = ahci_acpi_match,
114 		.pm = &ahci_pm_ops,
115 	},
116 };
117 module_platform_driver(ahci_driver);
118 
119 MODULE_DESCRIPTION("AHCI SATA platform driver");
120 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
121 MODULE_LICENSE("GPL");
122 MODULE_ALIAS("platform:ahci");
123