drivers/ata/pata_ninja32.c

   1 /*
   2  * pata_ninja32.c       - Ninja32 PATA for new ATA layer
   3  *                        (C) 2007 Red Hat Inc
   4  *
   5  * Note: The controller like many controllers has shared timings for
   6  * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back
   7  * in the dma_stop function. Thus we actually don't need a set_dmamode
   8  * method as the PIO method is always called and will set the right PIO
   9  * timing parameters.
  10  *
  11  * The Ninja32 Cardbus is not a generic SFF controller. Instead it is
  12  * laid out as follows off BAR 0. This is based upon Mark Lord's delkin
  13  * driver and the extensive analysis done by the BSD developers, notably
  14  * ITOH Yasufumi.
  15  *
  16  *      Base + 0x00 IRQ Status
  17  *      Base + 0x01 IRQ control
  18  *      Base + 0x02 Chipset control
  19  *      Base + 0x03 Unknown
  20  *      Base + 0x04 VDMA and reset control + wait bits
  21  *      Base + 0x08 BMIMBA
  22  *      Base + 0x0C DMA Length
  23  *      Base + 0x10 Taskfile
  24  *      Base + 0x18 BMDMA Status ?
  25  *      Base + 0x1C
  26  *      Base + 0x1D Bus master control
  27  *              bit 0 = enable
  28  *              bit 1 = 0 write/1 read
  29  *              bit 2 = 1 sgtable
  30  *              bit 3 = go
  31  *              bit 4-6 wait bits
  32  *              bit 7 = done
  33  *      Base + 0x1E AltStatus
  34  *      Base + 0x1F timing register
  35  */
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/pci.h>
  40 #include <linux/init.h>
  41 #include <linux/blkdev.h>
  42 #include <linux/delay.h>
  43 #include <scsi/scsi_host.h>
  44 #include <linux/libata.h>
  45
  46 #define DRV_NAME "pata_ninja32"
  47 #define DRV_VERSION "0.1.1"
  48
  49
  50 /**
  51  *      ninja32_set_piomode     -       set initial PIO mode data
  52  *      @ap: ATA interface
  53  *      @adev: ATA device
  54  *
  55  *      Called to do the PIO mode setup. Our timing registers are shared
  56  *      but we want to set the PIO timing by default.
  57  */
  58
  59 static void ninja32_set_piomode(struct ata_port *ap, struct ata_device *adev)
  60 {
  61         static u16 pio_timing[5] = {
  62                 0xd6, 0x85, 0x44, 0x33, 0x13
  63         };
  64         iowrite8(pio_timing[adev->pio_mode - XFER_PIO_0],
  65                  ap->ioaddr.bmdma_addr + 0x1f);
  66         ap->private_data = adev;
  67 }
  68
  69
  70 static void ninja32_dev_select(struct ata_port *ap, unsigned int device)
  71 {
  72         struct ata_device *adev = &ap->link.device[device];
  73         if (ap->private_data != adev) {
  74                 iowrite8(0xd6, ap->ioaddr.bmdma_addr + 0x1f);
  75                 ata_sff_dev_select(ap, device);
  76                 ninja32_set_piomode(ap, adev);
  77         }
  78 }
  79
  80 static struct scsi_host_template ninja32_sht = {
  81         ATA_BMDMA_SHT(DRV_NAME),
  82 };
  83
  84 static struct ata_port_operations ninja32_port_ops = {
  85         .inherits       = &ata_bmdma_port_ops,
  86         .sff_dev_select = ninja32_dev_select,
  87         .cable_detect   = ata_cable_40wire,
  88         .set_piomode    = ninja32_set_piomode,
  89 };
  90
  91 static void ninja32_program(void __iomem *base)
  92 {
  93         iowrite8(0x05, base + 0x01);    /* Enable interrupt lines */
  94         iowrite8(0xBE, base + 0x02);    /* Burst, ?? setup */
  95         iowrite8(0x01, base + 0x03);    /* Unknown */
  96         iowrite8(0x20, base + 0x04);    /* WAIT0 */
  97         iowrite8(0x8f, base + 0x05);    /* Unknown */
  98         iowrite8(0xa4, base + 0x1c);    /* Unknown */
  99         iowrite8(0x83, base + 0x1d);    /* BMDMA control: WAIT0 */
 100 }
 101
 102 static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 103 {
 104         struct ata_host *host;
 105         struct ata_port *ap;
 106         void __iomem *base;
 107         int rc;
 108
 109         host = ata_host_alloc(&dev->dev, 1);
 110         if (!host)
 111                 return -ENOMEM;
 112         ap = host->ports[0];
 113
 114         /* Set up the PCI device */
 115         rc = pcim_enable_device(dev);
 116         if (rc)
 117                 return rc;
 118         rc = pcim_iomap_regions(dev, 1 << 0, DRV_NAME);
 119         if (rc == -EBUSY)
 120                 pcim_pin_device(dev);
 121         if (rc)
 122                 return rc;
 123
 124         host->iomap = pcim_iomap_table(dev);
 125         rc = pci_set_dma_mask(dev, ATA_DMA_MASK);
 126         if (rc)
 127                 return rc;
 128         rc = pci_set_consistent_dma_mask(dev, ATA_DMA_MASK);
 129         if (rc)
 130                 return rc;
 131         pci_set_master(dev);
 132
 133         /* Set up the register mappings */
 134         base = host->iomap[0];
 135         if (!base)
 136                 return -ENOMEM;
 137         ap->ops = &ninja32_port_ops;
 138         ap->pio_mask = 0x1F;
 139         ap->flags |= ATA_FLAG_SLAVE_POSS;
 140
 141         ap->ioaddr.cmd_addr = base + 0x10;
 142         ap->ioaddr.ctl_addr = base + 0x1E;
 143         ap->ioaddr.altstatus_addr = base + 0x1E;
 144         ap->ioaddr.bmdma_addr = base;
 145         ata_sff_std_ports(&ap->ioaddr);
 146
 147         ninja32_program(base);
 148         /* FIXME: Should we disable them at remove ? */
 149         return ata_host_activate(host, dev->irq, ata_sff_interrupt,
 150                                  IRQF_SHARED, &ninja32_sht);
 151 }
 152
 153 #ifdef CONFIG_PM
 154
 155 static int ninja32_reinit_one(struct pci_dev *pdev)
 156 {
 157         struct ata_host *host = dev_get_drvdata(&pdev->dev);
 158         int rc;
 159
 160         rc = ata_pci_device_do_resume(pdev);
 161         if (rc)
 162                 return rc;
 163         ninja32_program(host->iomap[0]);
 164         ata_host_resume(host);
 165         return 0;
 166 }
 167 #endif
 168
 169 static const struct pci_device_id ninja32[] = {
 170         { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 171         { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 172         { },
 173 };
 174
 175 static struct pci_driver ninja32_pci_driver = {
 176         .name           = DRV_NAME,
 177         .id_table       = ninja32,
 178         .probe          = ninja32_init_one,
 179         .remove         = ata_pci_remove_one,
 180 #ifdef CONFIG_PM
 181         .suspend        = ata_pci_device_suspend,
 182         .resume         = ninja32_reinit_one,
 183 #endif
 184 };
 185
 186 static int __init ninja32_init(void)
 187 {
 188         return pci_register_driver(&ninja32_pci_driver);
 189 }
 190
 191 static void __exit ninja32_exit(void)
 192 {
 193         pci_unregister_driver(&ninja32_pci_driver);
 194 }
 195
 196 MODULE_AUTHOR("Alan Cox");
 197 MODULE_DESCRIPTION("low-level driver for Ninja32 ATA");
 198 MODULE_LICENSE("GPL");
 199 MODULE_DEVICE_TABLE(pci, ninja32);
 200 MODULE_VERSION(DRV_VERSION);
 201
 202 module_init(ninja32_init);
 203 module_exit(ninja32_exit);