diff options
Diffstat (limited to 'drivers/ata/ahci_platform.c')
| -rw-r--r-- | drivers/ata/ahci_platform.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c new file mode 100644 index 000000000..3aab2e3d5 --- /dev/null +++ b/drivers/ata/ahci_platform.c @@ -0,0 +1,118 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AHCI SATA platform driver + * + * Copyright 2004-2005 Red Hat, Inc. + * Jeff Garzik <jgarzik@pobox.com> + * Copyright 2010 MontaVista Software, LLC. + * Anton Vorontsov <avorontsov@ru.mvista.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pm.h> +#include <linux/device.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/libata.h> +#include <linux/ahci_platform.h> +#include <linux/acpi.h> +#include <linux/pci_ids.h> +#include "ahci.h" + +#define DRV_NAME "ahci" + +static const struct ata_port_info ahci_port_info = { + .flags = AHCI_FLAG_COMMON, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_platform_ops, +}; + +static const struct ata_port_info ahci_port_info_nolpm = { + .flags = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM, + .pio_mask = ATA_PIO4, + .udma_mask = ATA_UDMA6, + .port_ops = &ahci_platform_ops, +}; + +static struct scsi_host_template ahci_platform_sht = { + AHCI_SHT(DRV_NAME), +}; + +static int ahci_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ahci_host_priv *hpriv; + const struct ata_port_info *port; + int rc; + + hpriv = ahci_platform_get_resources(pdev, + AHCI_PLATFORM_GET_RESETS); + if (IS_ERR(hpriv)) + return PTR_ERR(hpriv); + + rc = ahci_platform_enable_resources(hpriv); + if (rc) + return rc; + + of_property_read_u32(dev->of_node, + "ports-implemented", &hpriv->force_port_map); + + if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci")) + hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ; + + port = acpi_device_get_match_data(dev); + if (!port) + port = &ahci_port_info; + + rc = ahci_platform_init_host(pdev, hpriv, port, + &ahci_platform_sht); + if (rc) + goto disable_resources; + + return 0; +disable_resources: + ahci_platform_disable_resources(hpriv); + return rc; +} + +static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend, + ahci_platform_resume); + +static const struct of_device_id ahci_of_match[] = { + { .compatible = "generic-ahci", }, + /* Keep the following compatibles for device tree compatibility */ + { .compatible = "snps,spear-ahci", }, + { .compatible = "ibm,476gtr-ahci", }, + { .compatible = "snps,dwc-ahci", }, + { .compatible = "hisilicon,hisi-ahci", }, + { .compatible = "cavium,octeon-7130-ahci", }, + {}, +}; +MODULE_DEVICE_TABLE(of, ahci_of_match); + +static const struct acpi_device_id ahci_acpi_match[] = { + { "APMC0D33", (unsigned long)&ahci_port_info_nolpm }, + { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) }, + {}, +}; +MODULE_DEVICE_TABLE(acpi, ahci_acpi_match); + +static struct platform_driver ahci_driver = { + .probe = ahci_probe, + .remove = ata_platform_remove_one, + .shutdown = ahci_platform_shutdown, + .driver = { + .name = DRV_NAME, + .of_match_table = ahci_of_match, + .acpi_match_table = ahci_acpi_match, + .pm = &ahci_pm_ops, + }, +}; +module_platform_driver(ahci_driver); + +MODULE_DESCRIPTION("AHCI SATA platform driver"); +MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ahci"); |