drivers/ata/pata_netcell.c

   1 /*
   2  *    pata_netcell.c - Netcell PATA driver
   3  *
   4  *      (c) 2006 Red Hat  <alan@redhat.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/pci.h>
  10 #include <linux/init.h>
  11 #include <linux/blkdev.h>
  12 #include <linux/delay.h>
  13 #include <linux/device.h>
  14 #include <scsi/scsi_host.h>
  15 #include <linux/libata.h>
  16 #include <linux/ata.h>
  17
  18 #define DRV_NAME        "pata_netcell"
  19 #define DRV_VERSION     "0.1.6"
  20
  21 /**
  22  *      netcell_probe_init      -       check for 40/80 pin
  23  *      @ap: Port
  24  *
  25  *      Cables are handled by the RAID controller. Report 80 pin.
  26  */
  27
  28 static int netcell_pre_reset(struct ata_port *ap)
  29 {
  30         ap->cbl = ATA_CBL_PATA80;
  31         return ata_std_prereset(ap);
  32 }
  33
  34 /**
  35  *      netcell_probe_reset - Probe specified port on PATA host controller
  36  *      @ap: Port to probe
  37  *
  38  *      LOCKING:
  39  *      None (inherited from caller).
  40  */
  41
  42 static void netcell_error_handler(struct ata_port *ap)
  43 {
  44         return ata_bmdma_drive_eh(ap, netcell_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
  45 }
  46
  47 /* No PIO or DMA methods needed for this device */
  48
  49 static struct scsi_host_template netcell_sht = {
  50         .module                 = THIS_MODULE,
  51         .name                   = DRV_NAME,
  52         .ioctl                  = ata_scsi_ioctl,
  53         .queuecommand           = ata_scsi_queuecmd,
  54         .can_queue              = ATA_DEF_QUEUE,
  55         .this_id                = ATA_SHT_THIS_ID,
  56         .sg_tablesize           = LIBATA_MAX_PRD,
  57         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  58         .emulated               = ATA_SHT_EMULATED,
  59         .use_clustering         = ATA_SHT_USE_CLUSTERING,
  60         .proc_name              = DRV_NAME,
  61         .dma_boundary           = ATA_DMA_BOUNDARY,
  62         .slave_configure        = ata_scsi_slave_config,
  63         .slave_destroy          = ata_scsi_slave_destroy,
  64         /* Use standard CHS mapping rules */
  65         .bios_param             = ata_std_bios_param,
  66         .resume                 = ata_scsi_device_resume,
  67         .suspend                = ata_scsi_device_suspend,
  68 };
  69
  70 static const struct ata_port_operations netcell_ops = {
  71         .port_disable           = ata_port_disable,
  72
  73         /* Task file is PCI ATA format, use helpers */
  74         .tf_load                = ata_tf_load,
  75         .tf_read                = ata_tf_read,
  76         .check_status           = ata_check_status,
  77         .exec_command           = ata_exec_command,
  78         .dev_select             = ata_std_dev_select,
  79
  80         .freeze                 = ata_bmdma_freeze,
  81         .thaw                   = ata_bmdma_thaw,
  82         .error_handler          = netcell_error_handler,
  83         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
  84
  85         /* BMDMA handling is PCI ATA format, use helpers */
  86         .bmdma_setup            = ata_bmdma_setup,
  87         .bmdma_start            = ata_bmdma_start,
  88         .bmdma_stop             = ata_bmdma_stop,
  89         .bmdma_status           = ata_bmdma_status,
  90         .qc_prep                = ata_qc_prep,
  91         .qc_issue               = ata_qc_issue_prot,
  92         .data_xfer              = ata_pio_data_xfer,
  93
  94         /* IRQ-related hooks */
  95         .irq_handler            = ata_interrupt,
  96         .irq_clear              = ata_bmdma_irq_clear,
  97
  98         /* Generic PATA PCI ATA helpers */
  99         .port_start             = ata_port_start,
 100         .port_stop              = ata_port_stop,
 101         .host_stop              = ata_host_stop,
 102 };
 103
 104
 105 /**
 106  *      netcell_init_one - Register Netcell ATA PCI device with kernel services
 107  *      @pdev: PCI device to register
 108  *      @ent: Entry in netcell_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 netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 120 {
 121         static int printed_version;
 122         static struct ata_port_info info = {
 123                 .sht            = &netcell_sht,
 124                 .flags          = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 125                 /* Actually we don't really care about these as the
 126                    firmware deals with it */
 127                 .pio_mask       = 0x1f, /* pio0-4 */
 128                 .mwdma_mask     = 0x07, /* mwdma0-2 */
 129                 .udma_mask      = 0x3f, /* UDMA 133 */
 130                 .port_ops       = &netcell_ops,
 131         };
 132         static struct ata_port_info *port_info[2] = { &info, &info };
 133
 134         if (!printed_version++)
 135                 dev_printk(KERN_DEBUG, &pdev->dev,
 136                            "version " DRV_VERSION "\n");
 137
 138         /* Any chip specific setup/optimisation/messages here */
 139         ata_pci_clear_simplex(pdev);
 140
 141         /* And let the library code do the work */
 142         return ata_pci_init_one(pdev, port_info, 2);
 143 }
 144
 145 static const struct pci_device_id netcell_pci_tbl[] = {
 146         { PCI_VDEVICE(NETCELL, PCI_DEVICE_ID_REVOLUTION), },
 147
 148         { }     /* terminate list */
 149 };
 150
 151 static struct pci_driver netcell_pci_driver = {
 152         .name                   = DRV_NAME,
 153         .id_table               = netcell_pci_tbl,
 154         .probe                  = netcell_init_one,
 155         .remove                 = ata_pci_remove_one,
 156         .suspend                = ata_pci_device_suspend,
 157         .resume                 = ata_pci_device_resume,
 158 };
 159
 160 static int __init netcell_init(void)
 161 {
 162         return pci_register_driver(&netcell_pci_driver);
 163 }
 164
 165 static void __exit netcell_exit(void)
 166 {
 167         pci_unregister_driver(&netcell_pci_driver);
 168 }
 169
 170 module_init(netcell_init);
 171 module_exit(netcell_exit);
 172
 173 MODULE_AUTHOR("Alan Cox");
 174 MODULE_DESCRIPTION("SCSI low-level driver for Netcell PATA RAID");
 175 MODULE_LICENSE("GPL");
 176 MODULE_DEVICE_TABLE(pci, netcell_pci_tbl);
 177 MODULE_VERSION(DRV_VERSION);
 178