Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / ata / pata_marvell.c

diff --git a/kernel/drivers/ata/pata_marvell.c b/kernel/drivers/ata/pata_marvell.c
new file mode 100644 (file)
index 0000000..ae9feb1
--- /dev/null
+++ b/kernel/drivers/ata/pata_marvell.c
@@ -0,0 +1,186 @@
+/*
+ *     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 (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_SATA_AHCI) || defined(CONFIG_SATA_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_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);