drivers/ata/pata_jmicron.c

   1 /*
   2  *    pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
   3  *                      PATA port of the controller. The SATA ports are
   4  *                      driven by AHCI in the usual configuration although
   5  *                      this driver can handle other setups if we need it.
   6  *
   7  *      (c) 2006 Red Hat  <alan@redhat.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/pci.h>
  13 #include <linux/init.h>
  14 #include <linux/blkdev.h>
  15 #include <linux/delay.h>
  16 #include <linux/device.h>
  17 #include <scsi/scsi_host.h>
  18 #include <linux/libata.h>
  19 #include <linux/ata.h>
  20
  21 #define DRV_NAME        "pata_jmicron"
  22 #define DRV_VERSION     "0.1.5"
  23
  24 typedef enum {
  25         PORT_PATA0 = 0,
  26         PORT_PATA1 = 1,
  27         PORT_SATA = 2,
  28 } port_type;
  29
  30 /**
  31  *      jmicron_pre_reset       -       check for 40/80 pin
  32  *      @link: ATA link
  33  *      @deadline: deadline jiffies for the operation
  34  *
  35  *      Perform the PATA port setup we need.
  36  *
  37  *      On the Jmicron 361/363 there is a single PATA port that can be mapped
  38  *      either as primary or secondary (or neither). We don't do any policy
  39  *      and setup here. We assume that has been done by init_one and the
  40  *      BIOS.
  41  */
  42 static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline)
  43 {
  44         struct ata_port *ap = link->ap;
  45         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  46         u32 control;
  47         u32 control5;
  48         int port_mask = 1<< (4 * ap->port_no);
  49         int port = ap->port_no;
  50         port_type port_map[2];
  51
  52         /* Check if our port is enabled */
  53         pci_read_config_dword(pdev, 0x40, &control);
  54         if ((control & port_mask) == 0)
  55                 return -ENOENT;
  56
  57         /* There are two basic mappings. One has the two SATA ports merged
  58            as master/slave and the secondary as PATA, the other has only the
  59            SATA port mapped */
  60         if (control & (1 << 23)) {
  61                 port_map[0] = PORT_SATA;
  62                 port_map[1] = PORT_PATA0;
  63         } else {
  64                 port_map[0] = PORT_SATA;
  65                 port_map[1] = PORT_SATA;
  66         }
  67
  68         /* The 365/366 may have this bit set to map the second PATA port
  69            as the internal primary channel */
  70         pci_read_config_dword(pdev, 0x80, &control5);
  71         if (control5 & (1<<24))
  72                 port_map[0] = PORT_PATA1;
  73
  74         /* The two ports may then be logically swapped by the firmware */
  75         if (control & (1 << 22))
  76                 port = port ^ 1;
  77
  78         /*
  79          *      Now we know which physical port we are talking about we can
  80          *      actually do our cable checking etc. Thankfully we don't need
  81          *      to do the plumbing for other cases.
  82          */
  83         switch (port_map[port]) {
  84         case PORT_PATA0:
  85                 if ((control & (1 << 5)) == 0)
  86                         return -ENOENT;
  87                 if (control & (1 << 3)) /* 40/80 pin primary */
  88                         ap->cbl = ATA_CBL_PATA40;
  89                 else
  90                         ap->cbl = ATA_CBL_PATA80;
  91                 break;
  92         case PORT_PATA1:
  93                 /* Bit 21 is set if the port is enabled */
  94                 if ((control5 & (1 << 21)) == 0)
  95                         return -ENOENT;
  96                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
  97                         ap->cbl = ATA_CBL_PATA40;
  98                 else
  99                         ap->cbl = ATA_CBL_PATA80;
 100                 break;
 101         case PORT_SATA:
 102                 ap->cbl = ATA_CBL_SATA;
 103                 break;
 104         }
 105         return ata_std_prereset(link, deadline);
 106 }
 107
 108 /**
 109  *      jmicron_error_handler - Setup and error handler
 110  *      @ap: Port to handle
 111  *
 112  *      LOCKING:
 113  *      None (inherited from caller).
 114  */
 115
 116 static void jmicron_error_handler(struct ata_port *ap)
 117 {
 118         return ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
 119 }
 120
 121 /* No PIO or DMA methods needed for this device */
 122
 123 static struct scsi_host_template jmicron_sht = {
 124         .module                 = THIS_MODULE,
 125         .name                   = DRV_NAME,
 126         .ioctl                  = ata_scsi_ioctl,
 127         .queuecommand           = ata_scsi_queuecmd,
 128         .can_queue              = ATA_DEF_QUEUE,
 129         .this_id                = ATA_SHT_THIS_ID,
 130         .sg_tablesize           = LIBATA_MAX_PRD,
 131         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 132         .emulated               = ATA_SHT_EMULATED,
 133         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 134         .proc_name              = DRV_NAME,
 135         .dma_boundary           = ATA_DMA_BOUNDARY,
 136         .slave_configure        = ata_scsi_slave_config,
 137         .slave_destroy          = ata_scsi_slave_destroy,
 138         /* Use standard CHS mapping rules */
 139         .bios_param             = ata_std_bios_param,
 140 };
 141
 142 static const struct ata_port_operations jmicron_ops = {
 143         /* Task file is PCI ATA format, use helpers */
 144         .tf_load                = ata_tf_load,
 145         .tf_read                = ata_tf_read,
 146         .check_status           = ata_check_status,
 147         .exec_command           = ata_exec_command,
 148         .dev_select             = ata_std_dev_select,
 149
 150         .freeze                 = ata_bmdma_freeze,
 151         .thaw                   = ata_bmdma_thaw,
 152         .error_handler          = jmicron_error_handler,
 153         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 154
 155         /* BMDMA handling is PCI ATA format, use helpers */
 156         .bmdma_setup            = ata_bmdma_setup,
 157         .bmdma_start            = ata_bmdma_start,
 158         .bmdma_stop             = ata_bmdma_stop,
 159         .bmdma_status           = ata_bmdma_status,
 160         .qc_prep                = ata_qc_prep,
 161         .qc_issue               = ata_qc_issue_prot,
 162         .data_xfer              = ata_data_xfer,
 163
 164         /* IRQ-related hooks */
 165         .irq_handler            = ata_interrupt,
 166         .irq_clear              = ata_bmdma_irq_clear,
 167         .irq_on                 = ata_irq_on,
 168
 169         /* Generic PATA PCI ATA helpers */
 170         .port_start             = ata_port_start,
 171 };
 172
 173
 174 /**
 175  *      jmicron_init_one - Register Jmicron ATA PCI device with kernel services
 176  *      @pdev: PCI device to register
 177  *      @ent: Entry in jmicron_pci_tbl matching with @pdev
 178  *
 179  *      Called from kernel PCI layer.
 180  *
 181  *      LOCKING:
 182  *      Inherited from PCI layer (may sleep).
 183  *
 184  *      RETURNS:
 185  *      Zero on success, or -ERRNO value.
 186  */
 187
 188 static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 189 {
 190         static const struct ata_port_info info = {
 191                 .sht            = &jmicron_sht,
 192                 .flags  = ATA_FLAG_SLAVE_POSS,
 193
 194                 .pio_mask       = 0x1f,
 195                 .mwdma_mask     = 0x07,
 196                 .udma_mask      = ATA_UDMA5,
 197
 198                 .port_ops       = &jmicron_ops,
 199         };
 200         const struct ata_port_info *ppi[] = { &info, NULL };
 201
 202         return ata_pci_init_one(pdev, ppi);
 203 }
 204
 205 static const struct pci_device_id jmicron_pci_tbl[] = {
 206         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 207           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
 208         { }     /* terminate list */
 209 };
 210
 211 static struct pci_driver jmicron_pci_driver = {
 212         .name                   = DRV_NAME,
 213         .id_table               = jmicron_pci_tbl,
 214         .probe                  = jmicron_init_one,
 215         .remove                 = ata_pci_remove_one,
 216 #ifdef CONFIG_PM
 217         .suspend                = ata_pci_device_suspend,
 218         .resume                 = ata_pci_device_resume,
 219 #endif
 220 };
 221
 222 static int __init jmicron_init(void)
 223 {
 224         return pci_register_driver(&jmicron_pci_driver);
 225 }
 226
 227 static void __exit jmicron_exit(void)
 228 {
 229         pci_unregister_driver(&jmicron_pci_driver);
 230 }
 231
 232 module_init(jmicron_init);
 233 module_exit(jmicron_exit);
 234
 235 MODULE_AUTHOR("Alan Cox");
 236 MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
 237 MODULE_LICENSE("GPL");
 238 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 239 MODULE_VERSION(DRV_VERSION);
 240