drivers/ata/pata_marvell.c

   1 /*
   2  *      Marvell PATA driver.
   3  *
   4  *      For the moment we drive the PATA port in legacy mode. That
   5  *      isn't making full use of the device functionality but it is
   6  *      easy to get working.
   7  *
   8  *      (c) 2006 Red Hat  <alan@redhat.com>
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/init.h>
  15 #include <linux/blkdev.h>
  16 #include <linux/delay.h>
  17 #include <linux/device.h>
  18 #include <scsi/scsi_host.h>
  19 #include <linux/libata.h>
  20 #include <linux/ata.h>
  21
  22 #define DRV_NAME        "pata_marvell"
  23 #define DRV_VERSION     "0.1.4"
  24
  25 /**
  26  *      marvell_pre_reset       -       check for 40/80 pin
  27  *      @link: link
  28  *      @deadline: deadline jiffies for the operation
  29  *
  30  *      Perform the PATA port setup we need.
  31  */
  32
  33 static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
  34 {
  35         struct ata_port *ap = link->ap;
  36         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  37         u32 devices;
  38         void __iomem *barp;
  39         int i;
  40
  41         /* Check if our port is enabled */
  42
  43         barp = pci_iomap(pdev, 5, 0x10);
  44         if (barp == NULL)
  45                 return -ENOMEM;
  46         printk("BAR5:");
  47         for(i = 0; i <= 0x0F; i++)
  48                 printk("%02X:%02X ", i, ioread8(barp + i));
  49         printk("\n");
  50
  51         devices = ioread32(barp + 0x0C);
  52         pci_iounmap(pdev, barp);
  53
  54         if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
  55             (!(devices & 0x10)))        /* PATA enable ? */
  56                 return -ENOENT;
  57
  58         return ata_sff_prereset(link, deadline);
  59 }
  60
  61 static int marvell_cable_detect(struct ata_port *ap)
  62 {
  63         /* Cable type */
  64         switch(ap->port_no)
  65         {
  66         case 0:
  67                 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
  68                         return ATA_CBL_PATA40;
  69                 return ATA_CBL_PATA80;
  70         case 1: /* Legacy SATA port */
  71                 return ATA_CBL_SATA;
  72         }
  73
  74         BUG();
  75         return 0;       /* Our BUG macro needs the right markup */
  76 }
  77
  78 /* No PIO or DMA methods needed for this device */
  79
  80 static struct scsi_host_template marvell_sht = {
  81         ATA_BMDMA_SHT(DRV_NAME),
  82 };
  83
  84 static struct ata_port_operations marvell_ops = {
  85         .inherits               = &ata_bmdma_port_ops,
  86         .cable_detect           = marvell_cable_detect,
  87         .prereset               = marvell_pre_reset,
  88 };
  89
  90
  91 /**
  92  *      marvell_init_one - Register Marvell ATA PCI device with kernel services
  93  *      @pdev: PCI device to register
  94  *      @ent: Entry in marvell_pci_tbl matching with @pdev
  95  *
  96  *      Called from kernel PCI layer.
  97  *
  98  *      LOCKING:
  99  *      Inherited from PCI layer (may sleep).
 100  *
 101  *      RETURNS:
 102  *      Zero on success, or -ERRNO value.
 103  */
 104
 105 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 106 {
 107         static const struct ata_port_info info = {
 108                 .flags          = ATA_FLAG_SLAVE_POSS,
 109
 110                 .pio_mask       = 0x1f,
 111                 .mwdma_mask     = 0x07,
 112                 .udma_mask      = ATA_UDMA5,
 113
 114                 .port_ops       = &marvell_ops,
 115         };
 116         static const struct ata_port_info info_sata = {
 117                 /* Slave possible as its magically mapped not real */
 118                 .flags          = ATA_FLAG_SLAVE_POSS,
 119
 120                 .pio_mask       = 0x1f,
 121                 .mwdma_mask     = 0x07,
 122                 .udma_mask      = ATA_UDMA6,
 123
 124                 .port_ops       = &marvell_ops,
 125         };
 126         const struct ata_port_info *ppi[] = { &info, &info_sata };
 127
 128         if (pdev->device == 0x6101)
 129                 ppi[1] = &ata_dummy_port_info;
 130
 131         return ata_pci_sff_init_one(pdev, ppi, &marvell_sht, NULL);
 132 }
 133
 134 static const struct pci_device_id marvell_pci_tbl[] = {
 135         { PCI_DEVICE(0x11AB, 0x6101), },
 136         { PCI_DEVICE(0x11AB, 0x6121), },
 137         { PCI_DEVICE(0x11AB, 0x6123), },
 138         { PCI_DEVICE(0x11AB, 0x6145), },
 139         { }     /* terminate list */
 140 };
 141
 142 static struct pci_driver marvell_pci_driver = {
 143         .name                   = DRV_NAME,
 144         .id_table               = marvell_pci_tbl,
 145         .probe                  = marvell_init_one,
 146         .remove                 = ata_pci_remove_one,
 147 #ifdef CONFIG_PM
 148         .suspend                = ata_pci_device_suspend,
 149         .resume                 = ata_pci_device_resume,
 150 #endif
 151 };
 152
 153 static int __init marvell_init(void)
 154 {
 155         return pci_register_driver(&marvell_pci_driver);
 156 }
 157
 158 static void __exit marvell_exit(void)
 159 {
 160         pci_unregister_driver(&marvell_pci_driver);
 161 }
 162
 163 module_init(marvell_init);
 164 module_exit(marvell_exit);
 165
 166 MODULE_AUTHOR("Alan Cox");
 167 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
 168 MODULE_LICENSE("GPL");
 169 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
 170 MODULE_VERSION(DRV_VERSION);
 171