root/drivers/ata/pata_ninja32.c

DEFINITIONS

1. ninja32_set_piomode
2. ninja32_dev_select
3. ninja32_program
4. ninja32_init_one
5. ninja32_reinit_one

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * pata_ninja32.c       - Ninja32 PATA for new ATA layer
   4  *                        (C) 2007 Red Hat Inc
   5  *
   6  * Note: The controller like many controllers has shared timings for
   7  * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back
   8  * in the dma_stop function. Thus we actually don't need a set_dmamode
   9  * method as the PIO method is always called and will set the right PIO
  10  * timing parameters.
  11  *
  12  * The Ninja32 Cardbus is not a generic SFF controller. Instead it is
  13  * laid out as follows off BAR 0. This is based upon Mark Lord's delkin
  14  * driver and the extensive analysis done by the BSD developers, notably
  15  * ITOH Yasufumi.
  16  *
  17  *      Base + 0x00 IRQ Status
  18  *      Base + 0x01 IRQ control
  19  *      Base + 0x02 Chipset control
  20  *      Base + 0x03 Unknown
  21  *      Base + 0x04 VDMA and reset control + wait bits
  22  *      Base + 0x08 BMIMBA
  23  *      Base + 0x0C DMA Length
  24  *      Base + 0x10 Taskfile
  25  *      Base + 0x18 BMDMA Status ?
  26  *      Base + 0x1C
  27  *      Base + 0x1D Bus master control
  28  *              bit 0 = enable
  29  *              bit 1 = 0 write/1 read
  30  *              bit 2 = 1 sgtable
  31  *              bit 3 = go
  32  *              bit 4-6 wait bits
  33  *              bit 7 = done
  34  *      Base + 0x1E AltStatus
  35  *      Base + 0x1F timing register
  36  */
  37 
  38 #include <linux/kernel.h>
  39 #include <linux/module.h>
  40 #include <linux/pci.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 "0.1.5"
  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         .sff_data_xfer  = ata_sff_data_xfer32
  90 };
  91 
  92 static void ninja32_program(void __iomem *base)
  93 {
  94         iowrite8(0x05, base + 0x01);    /* Enable interrupt lines */
  95         iowrite8(0xBE, base + 0x02);    /* Burst, ?? setup */
  96         iowrite8(0x01, base + 0x03);    /* Unknown */
  97         iowrite8(0x20, base + 0x04);    /* WAIT0 */
  98         iowrite8(0x8f, base + 0x05);    /* Unknown */
  99         iowrite8(0xa4, base + 0x1c);    /* Unknown */
 100         iowrite8(0x83, base + 0x1d);    /* BMDMA control: WAIT0 */
 101 }
 102 
 103 static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 104 {
 105         struct ata_host *host;
 106         struct ata_port *ap;
 107         void __iomem *base;
 108         int rc;
 109 
 110         host = ata_host_alloc(&dev->dev, 1);
 111         if (!host)
 112                 return -ENOMEM;
 113         ap = host->ports[0];
 114 
 115         /* Set up the PCI device */
 116         rc = pcim_enable_device(dev);
 117         if (rc)
 118                 return rc;
 119         rc = pcim_iomap_regions(dev, 1 << 0, DRV_NAME);
 120         if (rc == -EBUSY)
 121                 pcim_pin_device(dev);
 122         if (rc)
 123                 return rc;
 124 
 125         host->iomap = pcim_iomap_table(dev);
 126         rc = dma_set_mask_and_coherent(&dev->dev, ATA_DMA_MASK);
 127         if (rc)
 128                 return rc;
 129         pci_set_master(dev);
 130 
 131         /* Set up the register mappings. We use the I/O mapping as only the
 132            older chips also have MMIO on BAR 1 */
 133         base = host->iomap[0];
 134         if (!base)
 135                 return -ENOMEM;
 136         ap->ops = &ninja32_port_ops;
 137         ap->pio_mask = ATA_PIO4;
 138         ap->flags |= ATA_FLAG_SLAVE_POSS;
 139 
 140         ap->ioaddr.cmd_addr = base + 0x10;
 141         ap->ioaddr.ctl_addr = base + 0x1E;
 142         ap->ioaddr.altstatus_addr = base + 0x1E;
 143         ap->ioaddr.bmdma_addr = base;
 144         ata_sff_std_ports(&ap->ioaddr);
 145         ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
 146 
 147         ninja32_program(base);
 148         /* FIXME: Should we disable them at remove ? */
 149         return ata_host_activate(host, dev->irq, ata_bmdma_interrupt,
 150                                  IRQF_SHARED, &ninja32_sht);
 151 }
 152 
 153 #ifdef CONFIG_PM_SLEEP
 154 static int ninja32_reinit_one(struct pci_dev *pdev)
 155 {
 156         struct ata_host *host = pci_get_drvdata(pdev);
 157         int rc;
 158 
 159         rc = ata_pci_device_do_resume(pdev);
 160         if (rc)
 161                 return rc;
 162         ninja32_program(host->iomap[0]);
 163         ata_host_resume(host);
 164         return 0;
 165 }
 166 #endif
 167 
 168 static const struct pci_device_id ninja32[] = {
 169         { 0x10FC, 0x0003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 170         { 0x1145, 0x8008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 171         { 0x1145, 0xf008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 172         { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 173         { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 174         { 0x1145, 0xf02C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 175         { },
 176 };
 177 
 178 static struct pci_driver ninja32_pci_driver = {
 179         .name           = DRV_NAME,
 180         .id_table       = ninja32,
 181         .probe          = ninja32_init_one,
 182         .remove         = ata_pci_remove_one,
 183 #ifdef CONFIG_PM_SLEEP
 184         .suspend        = ata_pci_device_suspend,
 185         .resume         = ninja32_reinit_one,
 186 #endif
 187 };
 188 
 189 module_pci_driver(ninja32_pci_driver);
 190 
 191 MODULE_AUTHOR("Alan Cox");
 192 MODULE_DESCRIPTION("low-level driver for Ninja32 ATA");
 193 MODULE_LICENSE("GPL");
 194 MODULE_DEVICE_TABLE(pci, ninja32);
 195 MODULE_VERSION(DRV_VERSION);