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_std_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 /**
  79  *      marvell_error_handler - Setup and error handler
  80  *      @ap: Port to handle
  81  *
  82  *      LOCKING:
  83  *      None (inherited from caller).
  84  */
  85
  86 static void marvell_error_handler(struct ata_port *ap)
  87 {
  88         ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset, NULL,
  89                            ata_std_postreset);
  90 }
  91
  92 /* No PIO or DMA methods needed for this device */
  93
  94 static struct scsi_host_template marvell_sht = {
  95         ATA_BMDMA_SHT(DRV_NAME),
  96 };
  97
  98 static struct ata_port_operations marvell_ops = {
  99         .inherits               = &ata_bmdma_port_ops,
 100         .cable_detect           = marvell_cable_detect,
 101         .error_handler          = marvell_error_handler,
 102 };
 103
 104
 105 /**
 106  *      marvell_init_one - Register Marvell ATA PCI device with kernel services
 107  *      @pdev: PCI device to register
 108  *      @ent: Entry in marvell_pci_tbl matching with @pdev
 109  *
 110  *      Called from kernel PCI layer.
 111  *
 112  *      LOCKING:
 113  *      Inherited from PCI layer (may sleep).
 114  *
 115  *      RETURNS:
 116  *      Zero on success, or -ERRNO value.
 117  */
 118
 119 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 120 {
 121         static const struct ata_port_info info = {
 122                 .sht            = &marvell_sht,
 123                 .flags          = ATA_FLAG_SLAVE_POSS,
 124
 125                 .pio_mask       = 0x1f,
 126                 .mwdma_mask     = 0x07,
 127                 .udma_mask      = ATA_UDMA5,
 128
 129                 .port_ops       = &marvell_ops,
 130         };
 131         static const struct ata_port_info info_sata = {
 132                 .sht            = &marvell_sht,
 133                 /* Slave possible as its magically mapped not real */
 134                 .flags          = ATA_FLAG_SLAVE_POSS,
 135
 136                 .pio_mask       = 0x1f,
 137                 .mwdma_mask     = 0x07,
 138                 .udma_mask      = ATA_UDMA6,
 139
 140                 .port_ops       = &marvell_ops,
 141         };
 142         const struct ata_port_info *ppi[] = { &info, &info_sata };
 143
 144         if (pdev->device == 0x6101)
 145                 ppi[1] = &ata_dummy_port_info;
 146
 147         return ata_pci_init_one(pdev, ppi);
 148 }
 149
 150 static const struct pci_device_id marvell_pci_tbl[] = {
 151         { PCI_DEVICE(0x11AB, 0x6101), },
 152         { PCI_DEVICE(0x11AB, 0x6121), },
 153         { PCI_DEVICE(0x11AB, 0x6123), },
 154         { PCI_DEVICE(0x11AB, 0x6145), },
 155         { }     /* terminate list */
 156 };
 157
 158 static struct pci_driver marvell_pci_driver = {
 159         .name                   = DRV_NAME,
 160         .id_table               = marvell_pci_tbl,
 161         .probe                  = marvell_init_one,
 162         .remove                 = ata_pci_remove_one,
 163 #ifdef CONFIG_PM
 164         .suspend                = ata_pci_device_suspend,
 165         .resume                 = ata_pci_device_resume,
 166 #endif
 167 };
 168
 169 static int __init marvell_init(void)
 170 {
 171         return pci_register_driver(&marvell_pci_driver);
 172 }
 173
 174 static void __exit marvell_exit(void)
 175 {
 176         pci_unregister_driver(&marvell_pci_driver);
 177 }
 178
 179 module_init(marvell_init);
 180 module_exit(marvell_exit);
 181
 182 MODULE_AUTHOR("Alan Cox");
 183 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
 184 MODULE_LICENSE("GPL");
 185 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
 186 MODULE_VERSION(DRV_VERSION);
 187