drivers/ata/ahci_platform.c

   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
  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");