drivers/ata/sata_sis.c

Source file repositories/reference/linux-study-clean/drivers/ata/sata_sis.c

File Facts

System
Linux kernel
Corpus path
drivers/ata/sata_sis.c
Extension
.c
Size
7744 bytes
Lines
317
Domain
Driver Families
Bucket
drivers/ata
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static struct pci_driver sis_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= sis_pci_tbl,
	.probe			= sis_init_one,
	.remove			= ata_pci_remove_one,
#ifdef CONFIG_PM_SLEEP
	.suspend		= ata_pci_device_suspend,
	.resume			= ata_pci_device_resume,
#endif
};

static const struct scsi_host_template sis_sht = {
	ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations sis_ops = {
	.inherits		= &ata_bmdma_port_ops,
	.scr_read		= sis_scr_read,
	.scr_write		= sis_scr_write,
};

static const struct ata_port_info sis_port_info = {
	.flags		= ATA_FLAG_SATA,
	.pio_mask	= ATA_PIO4,
	.mwdma_mask	= ATA_MWDMA2,
	.udma_mask	= ATA_UDMA6,
	.port_ops	= &sis_ops,
};

MODULE_AUTHOR("Uwe Koziolek");
MODULE_DESCRIPTION("low-level driver for Silicon Integrated Systems SATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
MODULE_VERSION(DRV_VERSION);

static unsigned int get_scr_cfg_addr(struct ata_link *link, unsigned int sc_reg)
{
	struct ata_port *ap = link->ap;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
	u8 pmr;

	if (ap->port_no)  {
		switch (pdev->device) {
		case 0x0180:
		case 0x0181:
			pci_read_config_byte(pdev, SIS_PMR, &pmr);
			if ((pmr & SIS_PMR_COMBINED) == 0)
				addr += SIS180_SATA1_OFS;
			break;

		case 0x0182:
		case 0x0183:
		case 0x1182:
			addr += SIS182_SATA1_OFS;
			break;
		}
	}
	if (link->pmp)
		addr += 0x10;

	return addr;
}

static u32 sis_scr_cfg_read(struct ata_link *link,
			    unsigned int sc_reg, u32 *val)
{
	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);

	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
		return -EINVAL;

	pci_read_config_dword(pdev, cfg_addr, val);
	return 0;
}

static int sis_scr_cfg_write(struct ata_link *link,
			     unsigned int sc_reg, u32 val)
{
	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);

	pci_write_config_dword(pdev, cfg_addr, val);
	return 0;
}

static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
{
	struct ata_port *ap = link->ap;

Annotation

Implementation Notes