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     "0.1.1"
  24
  25 /**
  26  *      marvell_pre_reset       -       check for 40/80 pin
  27  *      @ap: Port
  28  *
  29  *      Perform the PATA port setup we need.
  30  */
  31
  32 static int marvell_pre_reset(struct ata_port *ap)
  33 {
  34         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  35         u32 devices;
  36         void __iomem *barp;
  37         int i;
  38
  39         /* Check if our port is enabled */
  40
  41         barp = pci_iomap(pdev, 5, 0x10);
  42         if (barp == NULL)
  43                 return -ENOMEM;
  44         printk("BAR5:");
  45         for(i = 0; i <= 0x0F; i++)
  46                 printk("%02X:%02X ", i, readb(barp + i));
  47         printk("\n");
  48
  49         devices = readl(barp + 0x0C);
  50         pci_iounmap(pdev, barp);
  51
  52         if ((pdev->device == 0x6145) && (ap->port_no == 0) &&
  53             (!(devices & 0x10)))        /* PATA enable ? */
  54                 return -ENOENT;
  55
  56         /* Cable type */
  57         switch(ap->port_no)
  58         {
  59         case 0:
  60                 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)
  61                         ap->cbl = ATA_CBL_PATA40;
  62                 else
  63                         ap->cbl = ATA_CBL_PATA80;
  64                 break;
  65
  66         case 1: /* Legacy SATA port */
  67                 ap->cbl = ATA_CBL_SATA;
  68                 break;
  69         }
  70         return ata_std_prereset(ap);
  71 }
  72
  73 /**
  74  *      marvell_error_handler - Setup and error handler
  75  *      @ap: Port to handle
  76  *
  77  *      LOCKING:
  78  *      None (inherited from caller).
  79  */
  80
  81 static void marvell_error_handler(struct ata_port *ap)
  82 {
  83         return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset,
  84                                   NULL, ata_std_postreset);
  85 }
  86
  87 /* No PIO or DMA methods needed for this device */
  88
  89 static struct scsi_host_template marvell_sht = {
  90         .module                 = THIS_MODULE,
  91         .name                   = DRV_NAME,
  92         .ioctl                  = ata_scsi_ioctl,
  93         .queuecommand           = ata_scsi_queuecmd,
  94         .can_queue              = ATA_DEF_QUEUE,
  95         .this_id                = ATA_SHT_THIS_ID,
  96         .sg_tablesize           = LIBATA_MAX_PRD,
  97         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  98         .emulated               = ATA_SHT_EMULATED,
  99         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 100         .proc_name              = DRV_NAME,
 101         .dma_boundary           = ATA_DMA_BOUNDARY,
 102         .slave_configure        = ata_scsi_slave_config,
 103         .slave_destroy          = ata_scsi_slave_destroy,
 104         /* Use standard CHS mapping rules */
 105         .bios_param             = ata_std_bios_param,
 106 #ifdef CONFIG_PM
 107         .resume                 = ata_scsi_device_resume,
 108         .suspend                = ata_scsi_device_suspend,
 109 #endif
 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
 127         /* BMDMA handling is PCI ATA format, use helpers */
 128         .bmdma_setup            = ata_bmdma_setup,
 129         .bmdma_start            = ata_bmdma_start,
 130         .bmdma_stop             = ata_bmdma_stop,
 131         .bmdma_status           = ata_bmdma_status,
 132         .qc_prep                = ata_qc_prep,
 133         .qc_issue               = ata_qc_issue_prot,
 134         .data_xfer              = ata_data_xfer,
 135
 136         /* Timeout handling */
 137         .irq_handler            = ata_interrupt,
 138         .irq_clear              = ata_bmdma_irq_clear,
 139         .irq_on                 = ata_irq_on,
 140         .irq_ack                = ata_irq_ack,
 141
 142         /* Generic PATA PCI ATA helpers */
 143         .port_start             = ata_port_start,
 144 };
 145
 146
 147 /**
 148  *      marvell_init_one - Register Marvell ATA PCI device with kernel services
 149  *      @pdev: PCI device to register
 150  *      @ent: Entry in marvell_pci_tbl matching with @pdev
 151  *
 152  *      Called from kernel PCI layer.
 153  *
 154  *      LOCKING:
 155  *      Inherited from PCI layer (may sleep).
 156  *
 157  *      RETURNS:
 158  *      Zero on success, or -ERRNO value.
 159  */
 160
 161 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 162 {
 163         static struct ata_port_info info = {
 164                 .sht            = &marvell_sht,
 165                 .flags          = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 166
 167                 .pio_mask       = 0x1f,
 168                 .mwdma_mask     = 0x07,
 169                 .udma_mask      = 0x3f,
 170
 171                 .port_ops       = &marvell_ops,
 172         };
 173         static struct ata_port_info info_sata = {
 174                 .sht            = &marvell_sht,
 175                 /* Slave possible as its magically mapped not real */
 176                 .flags          = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 177
 178                 .pio_mask       = 0x1f,
 179                 .mwdma_mask     = 0x07,
 180                 .udma_mask      = 0x7f,
 181
 182                 .port_ops       = &marvell_ops,
 183         };
 184         struct ata_port_info *port_info[2] = { &info, &info_sata };
 185         int n_port = 2;
 186
 187         if (pdev->device == 0x6101)
 188                 n_port = 1;
 189
 190         return ata_pci_init_one(pdev, port_info, n_port);
 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