drivers/ata/pata_cypress.c

   1 /*
   2  * pata_cypress.c       - Cypress PATA for new ATA layer
   3  *                        (C) 2006 Red Hat Inc
   4  *                        Alan Cox <alan@redhat.com>
   5  *
   6  * Based heavily on
   7  * linux/drivers/ide/pci/cy82c693.c             Version 0.40    Sep. 10, 2002
   8  *
   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 <scsi/scsi_host.h>
  18 #include <linux/libata.h>
  19
  20 #define DRV_NAME "pata_cypress"
  21 #define DRV_VERSION "0.1.5"
  22
  23 /* here are the offset definitions for the registers */
  24
  25 enum {
  26         CY82_IDE_CMDREG         = 0x04,
  27         CY82_IDE_ADDRSETUP      = 0x48,
  28         CY82_IDE_MASTER_IOR     = 0x4C,
  29         CY82_IDE_MASTER_IOW     = 0x4D,
  30         CY82_IDE_SLAVE_IOR      = 0x4E,
  31         CY82_IDE_SLAVE_IOW      = 0x4F,
  32         CY82_IDE_MASTER_8BIT    = 0x50,
  33         CY82_IDE_SLAVE_8BIT     = 0x51,
  34
  35         CY82_INDEX_PORT         = 0x22,
  36         CY82_DATA_PORT          = 0x23,
  37
  38         CY82_INDEX_CTRLREG1     = 0x01,
  39         CY82_INDEX_CHANNEL0     = 0x30,
  40         CY82_INDEX_CHANNEL1     = 0x31,
  41         CY82_INDEX_TIMEOUT      = 0x32
  42 };
  43
  44 /**
  45  *      cy82c693_set_piomode    -       set initial PIO mode data
  46  *      @ap: ATA interface
  47  *      @adev: ATA device
  48  *
  49  *      Called to do the PIO mode setup.
  50  */
  51
  52 static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)
  53 {
  54         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  55         struct ata_timing t;
  56         const unsigned long T = 1000000 / 33;
  57         short time_16, time_8;
  58         u32 addr;
  59
  60         if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {
  61                 printk(KERN_ERR DRV_NAME ": mome computation failed.\n");
  62                 return;
  63         }
  64
  65         time_16 = FIT(t.recover, 0, 15) | (FIT(t.active, 0, 15) << 4);
  66         time_8 = FIT(t.act8b, 0, 15) | (FIT(t.rec8b, 0, 15) << 4);
  67
  68         if (adev->devno == 0) {
  69                 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
  70
  71                 addr &= ~0x0F;  /* Mask bits */
  72                 addr |= FIT(t.setup, 0, 15);
  73
  74                 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
  75                 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16);
  76                 pci_write_config_byte(pdev, CY82_IDE_MASTER_IOW, time_16);
  77                 pci_write_config_byte(pdev, CY82_IDE_MASTER_8BIT, time_8);
  78         } else {
  79                 pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr);
  80
  81                 addr &= ~0xF0;  /* Mask bits */
  82                 addr |= (FIT(t.setup, 0, 15) << 4);
  83
  84                 pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr);
  85                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16);
  86                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOW, time_16);
  87                 pci_write_config_byte(pdev, CY82_IDE_SLAVE_8BIT, time_8);
  88         }
  89 }
  90
  91 /**
  92  *      cy82c693_set_dmamode    -       set initial DMA mode data
  93  *      @ap: ATA interface
  94  *      @adev: ATA device
  95  *
  96  *      Called to do the DMA mode setup.
  97  */
  98
  99 static void cy82c693_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 100 {
 101         int reg = CY82_INDEX_CHANNEL0 + ap->port_no;
 102
 103         /* Be afraid, be very afraid. Magic registers  in low I/O space */
 104         outb(reg, 0x22);
 105         outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);
 106
 107         /* 0x50 gives the best behaviour on the Alpha's using this chip */
 108         outb(CY82_INDEX_TIMEOUT, 0x22);
 109         outb(0x50, 0x23);
 110 }
 111
 112 static struct scsi_host_template cy82c693_sht = {
 113         .module                 = THIS_MODULE,
 114         .name                   = DRV_NAME,
 115         .ioctl                  = ata_scsi_ioctl,
 116         .queuecommand           = ata_scsi_queuecmd,
 117         .can_queue              = ATA_DEF_QUEUE,
 118         .this_id                = ATA_SHT_THIS_ID,
 119         .sg_tablesize           = LIBATA_MAX_PRD,
 120         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 121         .emulated               = ATA_SHT_EMULATED,
 122         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 123         .proc_name              = DRV_NAME,
 124         .dma_boundary           = ATA_DMA_BOUNDARY,
 125         .slave_configure        = ata_scsi_slave_config,
 126         .slave_destroy          = ata_scsi_slave_destroy,
 127         .bios_param             = ata_std_bios_param,
 128 };
 129
 130 static struct ata_port_operations cy82c693_port_ops = {
 131         .set_piomode    = cy82c693_set_piomode,
 132         .set_dmamode    = cy82c693_set_dmamode,
 133         .mode_filter    = ata_pci_default_filter,
 134
 135         .tf_load        = ata_tf_load,
 136         .tf_read        = ata_tf_read,
 137         .check_status   = ata_check_status,
 138         .exec_command   = ata_exec_command,
 139         .dev_select     = ata_std_dev_select,
 140
 141         .freeze         = ata_bmdma_freeze,
 142         .thaw           = ata_bmdma_thaw,
 143         .error_handler  = ata_bmdma_error_handler,
 144         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 145         .cable_detect   = ata_cable_40wire,
 146
 147         .bmdma_setup    = ata_bmdma_setup,
 148         .bmdma_start    = ata_bmdma_start,
 149         .bmdma_stop     = ata_bmdma_stop,
 150         .bmdma_status   = ata_bmdma_status,
 151
 152         .qc_prep        = ata_qc_prep,
 153         .qc_issue       = ata_qc_issue_prot,
 154
 155         .data_xfer      = ata_data_xfer,
 156
 157         .irq_handler    = ata_interrupt,
 158         .irq_clear      = ata_bmdma_irq_clear,
 159         .irq_on         = ata_irq_on,
 160
 161         .port_start     = ata_sff_port_start,
 162 };
 163
 164 static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 165 {
 166         static const struct ata_port_info info = {
 167                 .sht = &cy82c693_sht,
 168                 .flags = ATA_FLAG_SLAVE_POSS,
 169                 .pio_mask = 0x1f,
 170                 .mwdma_mask = 0x07,
 171                 .port_ops = &cy82c693_port_ops
 172         };
 173         const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
 174
 175         /* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
 176            For the moment we don't handle the secondary. FIXME */
 177
 178         if (PCI_FUNC(pdev->devfn) != 1)
 179                 return -ENODEV;
 180
 181         return ata_pci_init_one(pdev, ppi);
 182 }
 183
 184 static const struct pci_device_id cy82c693[] = {
 185         { PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), },
 186
 187         { },
 188 };
 189
 190 static struct pci_driver cy82c693_pci_driver = {
 191         .name           = DRV_NAME,
 192         .id_table       = cy82c693,
 193         .probe          = cy82c693_init_one,
 194         .remove         = ata_pci_remove_one,
 195 #ifdef CONFIG_PM
 196         .suspend        = ata_pci_device_suspend,
 197         .resume         = ata_pci_device_resume,
 198 #endif
 199 };
 200
 201 static int __init cy82c693_init(void)
 202 {
 203         return pci_register_driver(&cy82c693_pci_driver);
 204 }
 205
 206
 207 static void __exit cy82c693_exit(void)
 208 {
 209         pci_unregister_driver(&cy82c693_pci_driver);
 210 }
 211
 212
 213 MODULE_AUTHOR("Alan Cox");
 214 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");
 215 MODULE_LICENSE("GPL");
 216 MODULE_DEVICE_TABLE(pci, cy82c693);
 217 MODULE_VERSION(DRV_VERSION);
 218
 219 module_init(cy82c693_init);
 220 module_exit(cy82c693_exit);