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