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