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pata_netcell.c

/*
 *    pata_netcell.c - Netcell PATA driver
 *
 *    (c) 2006 Red Hat  <alan@redhat.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/ata.h>

#define DRV_NAME  "pata_netcell"
#define DRV_VERSION     "0.1.7"

/* No PIO or DMA methods needed for this device */

static struct scsi_host_template netcell_sht = {
      .module                 = THIS_MODULE,
      .name             = DRV_NAME,
      .ioctl                  = ata_scsi_ioctl,
      .queuecommand           = ata_scsi_queuecmd,
      .can_queue        = ATA_DEF_QUEUE,
      .this_id          = ATA_SHT_THIS_ID,
      .sg_tablesize           = LIBATA_MAX_PRD,
      .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
      .emulated         = ATA_SHT_EMULATED,
      .use_clustering         = ATA_SHT_USE_CLUSTERING,
      .proc_name        = DRV_NAME,
      .dma_boundary           = ATA_DMA_BOUNDARY,
      .slave_configure  = ata_scsi_slave_config,
      .slave_destroy          = ata_scsi_slave_destroy,
      /* Use standard CHS mapping rules */
      .bios_param       = ata_std_bios_param,
};

static const struct ata_port_operations netcell_ops = {
      /* Task file is PCI ATA format, use helpers */
      .tf_load          = ata_tf_load,
      .tf_read          = ata_tf_read,
      .check_status           = ata_check_status,
      .exec_command           = ata_exec_command,
      .dev_select       = ata_std_dev_select,

      .freeze                 = ata_bmdma_freeze,
      .thaw             = ata_bmdma_thaw,
      .error_handler          = ata_bmdma_error_handler,
      .post_internal_cmd      = ata_bmdma_post_internal_cmd,
      .cable_detect           = ata_cable_80wire,

      /* BMDMA handling is PCI ATA format, use helpers */
      .bmdma_setup            = ata_bmdma_setup,
      .bmdma_start            = ata_bmdma_start,
      .bmdma_stop       = ata_bmdma_stop,
      .bmdma_status           = ata_bmdma_status,
      .qc_prep          = ata_qc_prep,
      .qc_issue         = ata_qc_issue_prot,
      .data_xfer        = ata_data_xfer,

      /* IRQ-related hooks */
      .irq_handler            = ata_interrupt,
      .irq_clear        = ata_bmdma_irq_clear,
      .irq_on                 = ata_irq_on,

      /* Generic PATA PCI ATA helpers */
      .port_start       = ata_sff_port_start,
};


/**
 *    netcell_init_one - Register Netcell ATA PCI device with kernel services
 *    @pdev: PCI device to register
 *    @ent: Entry in netcell_pci_tbl matching with @pdev
 *
 *    Called from kernel PCI layer.
 *
 *    LOCKING:
 *    Inherited from PCI layer (may sleep).
 *
 *    RETURNS:
 *    Zero on success, or -ERRNO value.
 */

static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
      static int printed_version;
      static const struct ata_port_info info = {
            .sht        = &netcell_sht,
            .flags            = ATA_FLAG_SLAVE_POSS,
            /* Actually we don't really care about these as the
               firmware deals with it */
            .pio_mask   = 0x1f,     /* pio0-4 */
            .mwdma_mask = 0x07, /* mwdma0-2 */
            .udma_mask  = ATA_UDMA5, /* UDMA 133 */
            .port_ops   = &netcell_ops,
      };
      const struct ata_port_info *port_info[] = { &info, NULL };

      if (!printed_version++)
            dev_printk(KERN_DEBUG, &pdev->dev,
                     "version " DRV_VERSION "\n");

      /* Any chip specific setup/optimisation/messages here */
      ata_pci_clear_simplex(pdev);

      /* And let the library code do the work */
      return ata_pci_init_one(pdev, port_info);
}

static const struct pci_device_id netcell_pci_tbl[] = {
      { PCI_VDEVICE(NETCELL, PCI_DEVICE_ID_REVOLUTION), },

      { }   /* terminate list */
};

static struct pci_driver netcell_pci_driver = {
      .name             = DRV_NAME,
      .id_table         = netcell_pci_tbl,
      .probe                  = netcell_init_one,
      .remove                 = ata_pci_remove_one,
#ifdef CONFIG_PM
      .suspend          = ata_pci_device_suspend,
      .resume                 = ata_pci_device_resume,
#endif
};

static int __init netcell_init(void)
{
      return pci_register_driver(&netcell_pci_driver);
}

static void __exit netcell_exit(void)
{
      pci_unregister_driver(&netcell_pci_driver);
}

module_init(netcell_init);
module_exit(netcell_exit);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("SCSI low-level driver for Netcell PATA RAID");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, netcell_pci_tbl);
MODULE_VERSION(DRV_VERSION);


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