diff options
Diffstat (limited to 'drivers/ata/pata_marvell.c')
| -rw-r--r-- | drivers/ata/pata_marvell.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c new file mode 100644 index 000000000..c56f4043b --- /dev/null +++ b/drivers/ata/pata_marvell.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Marvell PATA driver. + * + * For the moment we drive the PATA port in legacy mode. That + * isn't making full use of the device functionality but it is + * easy to get working. + * + * (c) 2006 Red Hat + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <scsi/scsi_host.h> +#include <linux/libata.h> +#include <linux/ata.h> + +#define DRV_NAME "pata_marvell" +#define DRV_VERSION "0.1.6" + +/** + * marvell_pata_active - check if PATA is active + * @pdev: PCI device + * + * Returns 1 if the PATA port may be active. We know how to check this + * for the 6145 but not the other devices + */ + +static int marvell_pata_active(struct pci_dev *pdev) +{ + int i; + u32 devices; + void __iomem *barp; + + /* We don't yet know how to do this for other devices */ + if (pdev->device != 0x6145) + return 1; + + barp = pci_iomap(pdev, 5, 0x10); + if (barp == NULL) + return -ENOMEM; + + printk("BAR5:"); + for(i = 0; i <= 0x0F; i++) + printk("%02X:%02X ", i, ioread8(barp + i)); + printk("\n"); + + devices = ioread32(barp + 0x0C); + pci_iounmap(pdev, barp); + + if (devices & 0x10) + return 1; + return 0; +} + +/** + * marvell_pre_reset - probe begin + * @link: link + * @deadline: deadline jiffies for the operation + * + * Perform the PATA port setup we need. + */ + +static int marvell_pre_reset(struct ata_link *link, unsigned long deadline) +{ + struct ata_port *ap = link->ap; + struct pci_dev *pdev = to_pci_dev(ap->host->dev); + + if (pdev->device == 0x6145 && ap->port_no == 0 && + !marvell_pata_active(pdev)) /* PATA enable ? */ + return -ENOENT; + + return ata_sff_prereset(link, deadline); +} + +static int marvell_cable_detect(struct ata_port *ap) +{ + /* Cable type */ + switch(ap->port_no) + { + case 0: + if (!ap->ioaddr.bmdma_addr) + return ATA_CBL_PATA_UNK; + if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) + return ATA_CBL_PATA40; + return ATA_CBL_PATA80; + case 1: /* Legacy SATA port */ + return ATA_CBL_SATA; + } + + BUG(); + return 0; /* Our BUG macro needs the right markup */ +} + +/* No PIO or DMA methods needed for this device */ + +static struct scsi_host_template marvell_sht = { + ATA_BMDMA_SHT(DRV_NAME), +}; + +static struct ata_port_operations marvell_ops = { + .inherits = &ata_bmdma_port_ops, + .cable_detect = marvell_cable_detect, + .prereset = marvell_pre_reset, +}; + + +/** + * marvell_init_one - Register Marvell ATA PCI device with kernel services + * @pdev: PCI device to register + * @ent: Entry in marvell_pci_tbl matching with @pdev + * + * Called from kernel PCI layer. + * + * LOCKING: + * Inherited from PCI layer (may sleep). + * + * RETURNS: + * Zero on success, or -ERRNO value. + */ + +static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) +{ + static const struct ata_port_info info = { + .flags = ATA_FLAG_SLAVE_POSS, + + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + + .port_ops = &marvell_ops, + }; + static const struct ata_port_info info_sata = { + /* Slave possible as its magically mapped not real */ + .flags = ATA_FLAG_SLAVE_POSS, + + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA6, + + .port_ops = &marvell_ops, + }; + const struct ata_port_info *ppi[] = { &info, &info_sata }; + + if (pdev->device == 0x6101) + ppi[1] = &ata_dummy_port_info; + +#if IS_ENABLED(CONFIG_SATA_AHCI) + if (!marvell_pata_active(pdev)) { + printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n"); + return -ENODEV; + } +#endif + return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0); +} + +static const struct pci_device_id marvell_pci_tbl[] = { + { PCI_DEVICE(0x11AB, 0x6101), }, + { PCI_DEVICE(0x11AB, 0x6121), }, + { PCI_DEVICE(0x11AB, 0x6123), }, + { PCI_DEVICE(0x11AB, 0x6145), }, + { PCI_DEVICE(0x1B4B, 0x91A0), }, + { PCI_DEVICE(0x1B4B, 0x91A4), }, + + { } /* terminate list */ +}; + +static struct pci_driver marvell_pci_driver = { + .name = DRV_NAME, + .id_table = marvell_pci_tbl, + .probe = marvell_init_one, + .remove = ata_pci_remove_one, +#ifdef CONFIG_PM_SLEEP + .suspend = ata_pci_device_suspend, + .resume = ata_pci_device_resume, +#endif +}; + +module_pci_driver(marvell_pci_driver); + +MODULE_AUTHOR("Alan Cox"); +MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); +MODULE_VERSION(DRV_VERSION); |