/* * 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/init.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 (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 defined(CONFIG_AHCI) || defined(CONFIG_AHCI_MODULE) 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_sff_init_one(pdev, ppi, &marvell_sht, NULL); } 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), }, { } /* 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 .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; static int __init marvell_init(void) { return pci_register_driver(&marvell_pci_driver); } static void __exit marvell_exit(void) { pci_unregister_driver(&marvell_pci_driver); } module_init(marvell_init); module_exit(marvell_exit); 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);