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  *      @ap: Port
  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_port *ap, unsigned long deadline)
  34 {
  35         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  36         u32 devices;
  37         void __iomem *barp;
  38         int i;
  39
  40         /* Check if our port is enabled */
  41
  42         barp = pci_iomap(pdev, 5, 0x10);
  43         if (barp == NULL)
  44                 return -ENOMEM;
  45         printk("BAR5:");
  46         for(i = 0; i <= 0x0F; i++)
  47                 printk("%02X:%02X ", i, readb(barp + i));
  48         printk("\n");
  49
  50         devices = readl(barp + 0x0C);
  51         pci_iounmap(pdev, barp);
  52
  53         if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
  54             (!(devices & 0x10)))        /* PATA enable ? */
  55                 return -ENOENT;
  56
  57         return ata_std_prereset(ap, deadline);
  58 }
  59
  60 static int marvell_cable_detect(struct ata_port *ap)
  61 {
  62         /* Cable type */
  63         switch(ap->port_no)
  64         {
  65         case 0:
  66                 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
  67                         return ATA_CBL_PATA40;
  68                 return ATA_CBL_PATA80;
  69         case 1: /* Legacy SATA port */
  70                 return ATA_CBL_SATA;
  71         }
  72
  73         BUG();
  74         return 0;       /* Our BUG macro needs the right markup */
  75 }
  76
  77 /**
  78  *      marvell_error_handler - Setup and error handler
  79  *      @ap: Port to handle
  80  *
  81  *      LOCKING:
  82  *      None (inherited from caller).
  83  */
  84
  85 static void marvell_error_handler(struct ata_port *ap)
  86 {
  87         return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset,
  88                                   NULL, ata_std_postreset);
  89 }
  90
  91 /* No PIO or DMA methods needed for this device */
  92
  93 static struct scsi_host_template marvell_sht = {
  94         .module                 = THIS_MODULE,
  95         .name                   = DRV_NAME,
  96         .ioctl                  = ata_scsi_ioctl,
  97         .queuecommand           = ata_scsi_queuecmd,
  98         .can_queue              = ATA_DEF_QUEUE,
  99         .this_id                = ATA_SHT_THIS_ID,
 100         .sg_tablesize           = LIBATA_MAX_PRD,
 101         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 102         .emulated               = ATA_SHT_EMULATED,
 103         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 104         .proc_name              = DRV_NAME,
 105         .dma_boundary           = ATA_DMA_BOUNDARY,
 106         .slave_configure        = ata_scsi_slave_config,
 107         .slave_destroy          = ata_scsi_slave_destroy,
 108         /* Use standard CHS mapping rules */
 109         .bios_param             = ata_std_bios_param,
 110 };
 111
 112 static const struct ata_port_operations marvell_ops = {
 113         .port_disable           = ata_port_disable,
 114
 115         /* Task file is PCI ATA format, use helpers */
 116         .tf_load                = ata_tf_load,
 117         .tf_read                = ata_tf_read,
 118         .check_status           = ata_check_status,
 119         .exec_command           = ata_exec_command,
 120         .dev_select             = ata_std_dev_select,
 121
 122         .freeze                 = ata_bmdma_freeze,
 123         .thaw                   = ata_bmdma_thaw,
 124         .error_handler          = marvell_error_handler,
 125         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 126         .cable_detect           = marvell_cable_detect,
 127
 128         /* BMDMA handling is PCI ATA format, use helpers */
 129         .bmdma_setup            = ata_bmdma_setup,
 130         .bmdma_start            = ata_bmdma_start,
 131         .bmdma_stop             = ata_bmdma_stop,
 132         .bmdma_status           = ata_bmdma_status,
 133         .qc_prep                = ata_qc_prep,
 134         .qc_issue               = ata_qc_issue_prot,
 135         .data_xfer              = ata_data_xfer,
 136
 137         /* Timeout handling */
 138         .irq_handler            = ata_interrupt,
 139         .irq_clear              = ata_bmdma_irq_clear,
 140         .irq_on                 = ata_irq_on,
 141         .irq_ack                = ata_irq_ack,
 142
 143         /* Generic PATA PCI ATA helpers */
 144         .port_start             = ata_port_start,
 145 };
 146
 147
 148 /**
 149  *      marvell_init_one - Register Marvell ATA PCI device with kernel services
 150  *      @pdev: PCI device to register
 151  *      @ent: Entry in marvell_pci_tbl matching with @pdev
 152  *
 153  *      Called from kernel PCI layer.
 154  *
 155  *      LOCKING:
 156  *      Inherited from PCI layer (may sleep).
 157  *
 158  *      RETURNS:
 159  *      Zero on success, or -ERRNO value.
 160  */
 161
 162 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 163 {
 164         static const struct ata_port_info info = {
 165                 .sht            = &marvell_sht,
 166                 .flags          = ATA_FLAG_SLAVE_POSS,
 167
 168                 .pio_mask       = 0x1f,
 169                 .mwdma_mask     = 0x07,
 170                 .udma_mask      = ATA_UDMA5,
 171
 172                 .port_ops       = &marvell_ops,
 173         };
 174         static const struct ata_port_info info_sata = {
 175                 .sht            = &marvell_sht,
 176                 /* Slave possible as its magically mapped not real */
 177                 .flags          = ATA_FLAG_SLAVE_POSS,
 178
 179                 .pio_mask       = 0x1f,
 180                 .mwdma_mask     = 0x07,
 181                 .udma_mask      = ATA_UDMA6,
 182
 183                 .port_ops       = &marvell_ops,
 184         };
 185         const struct ata_port_info *ppi[] = { &info, &info_sata };
 186
 187         if (pdev->device == 0x6101)
 188                 ppi[1] = &ata_dummy_port_info;
 189
 190         return ata_pci_init_one(pdev, ppi);
 191 }
 192
 193 static const struct pci_device_id marvell_pci_tbl[] = {
 194         { PCI_DEVICE(0x11AB, 0x6101), },
 195         { PCI_DEVICE(0x11AB, 0x6145), },
 196         { }     /* terminate list */
 197 };
 198
 199 static struct pci_driver marvell_pci_driver = {
 200         .name                   = DRV_NAME,
 201         .id_table               = marvell_pci_tbl,
 202         .probe                  = marvell_init_one,
 203         .remove                 = ata_pci_remove_one,
 204 #ifdef CONFIG_PM
 205         .suspend                = ata_pci_device_suspend,
 206         .resume                 = ata_pci_device_resume,
 207 #endif
 208 };
 209
 210 static int __init marvell_init(void)
 211 {
 212         return pci_register_driver(&marvell_pci_driver);
 213 }
 214
 215 static void __exit marvell_exit(void)
 216 {
 217         pci_unregister_driver(&marvell_pci_driver);
 218 }
 219
 220 module_init(marvell_init);
 221 module_exit(marvell_exit);
 222
 223 MODULE_AUTHOR("Alan Cox");
 224 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");
 225 MODULE_LICENSE("GPL");
 226 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);
 227 MODULE_VERSION(DRV_VERSION);
 228