diff options
Diffstat (limited to 'drivers/ata/pata_ninja32.c')
| -rw-r--r-- | drivers/ata/pata_ninja32.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/ata/pata_ninja32.c b/drivers/ata/pata_ninja32.c new file mode 100644 index 000000000000..1c1b83541d13 --- /dev/null +++ b/drivers/ata/pata_ninja32.c @@ -0,0 +1,214 @@ +/* + * pata_ninja32.c - Ninja32 PATA for new ATA layer + * (C) 2007 Red Hat Inc + * Alan Cox <alan@redhat.com> + * + * Note: The controller like many controllers has shared timings for + * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back + * in the dma_stop function. Thus we actually don't need a set_dmamode + * method as the PIO method is always called and will set the right PIO + * timing parameters. + * + * The Ninja32 Cardbus is not a generic SFF controller. Instead it is + * laid out as follows off BAR 0. This is based upon Mark Lord's delkin + * driver and the extensive analysis done by the BSD developers, notably + * ITOH Yasufumi. + * + * Base + 0x00 IRQ Status + * Base + 0x01 IRQ control + * Base + 0x02 Chipset control + * Base + 0x04 VDMA and reset control + wait bits + * Base + 0x08 BMIMBA + * Base + 0x0C DMA Length + * Base + 0x10 Taskfile + * Base + 0x18 BMDMA Status ? + * Base + 0x1C + * Base + 0x1D Bus master control + * bit 0 = enable + * bit 1 = 0 write/1 read + * bit 2 = 1 sgtable + * bit 3 = go + * bit 4-6 wait bits + * bit 7 = done + * Base + 0x1E AltStatus + * Base + 0x1F timing register + */ + +#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 <scsi/scsi_host.h> +#include <linux/libata.h> + +#define DRV_NAME "pata_ninja32" +#define DRV_VERSION "0.0.1" + + +/** + * ninja32_set_piomode - set initial PIO mode data + * @ap: ATA interface + * @adev: ATA device + * + * Called to do the PIO mode setup. Our timing registers are shared + * but we want to set the PIO timing by default. + */ + +static void ninja32_set_piomode(struct ata_port *ap, struct ata_device *adev) +{ + static u16 pio_timing[5] = { + 0xd6, 0x85, 0x44, 0x33, 0x13 + }; + iowrite8(pio_timing[adev->pio_mode - XFER_PIO_0], + ap->ioaddr.bmdma_addr + 0x1f); + ap->private_data = adev; +} + + +static void ninja32_dev_select(struct ata_port *ap, unsigned int device) +{ + struct ata_device *adev = &ap->link.device[device]; + if (ap->private_data != adev) { + iowrite8(0xd6, ap->ioaddr.bmdma_addr + 0x1f); + ata_std_dev_select(ap, device); + ninja32_set_piomode(ap, adev); + } +} + +static struct scsi_host_template ninja32_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, + .bios_param = ata_std_bios_param, +}; + +static struct ata_port_operations ninja32_port_ops = { + .set_piomode = ninja32_set_piomode, + .mode_filter = ata_pci_default_filter, + + .tf_load = ata_tf_load, + .tf_read = ata_tf_read, + .check_status = ata_check_status, + .exec_command = ata_exec_command, + .dev_select = ninja32_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_40wire, + + .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_handler = ata_interrupt, + .irq_clear = ata_bmdma_irq_clear, + .irq_on = ata_irq_on, + + .port_start = ata_sff_port_start, +}; + +static int ninja32_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct ata_host *host; + struct ata_port *ap; + void __iomem *base; + int rc; + + host = ata_host_alloc(&dev->dev, 1); + if (!host) + return -ENOMEM; + ap = host->ports[0]; + + /* Set up the PCI device */ + rc = pcim_enable_device(dev); + if (rc) + return rc; + rc = pcim_iomap_regions(dev, 1 << 0, DRV_NAME); + if (rc == -EBUSY) + pcim_pin_device(dev); + if (rc) + return rc; + + host->iomap = pcim_iomap_table(dev); + rc = pci_set_dma_mask(dev, ATA_DMA_MASK); + if (rc) + return rc; + rc = pci_set_consistent_dma_mask(dev, ATA_DMA_MASK); + if (rc) + return rc; + pci_set_master(dev); + + /* Set up the register mappings */ + base = host->iomap[0]; + if (!base) + return -ENOMEM; + ap->ops = &ninja32_port_ops; + ap->pio_mask = 0x1F; + ap->flags |= ATA_FLAG_SLAVE_POSS; + + ap->ioaddr.cmd_addr = base + 0x10; + ap->ioaddr.ctl_addr = base + 0x1E; + ap->ioaddr.altstatus_addr = base + 0x1E; + ap->ioaddr.bmdma_addr = base; + ata_std_ports(&ap->ioaddr); + + iowrite8(0x05, base + 0x01); /* Enable interrupt lines */ + iowrite8(0xB3, base + 0x02); /* Burst, ?? setup */ + iowrite8(0x00, base + 0x04); /* WAIT0 ? */ + /* FIXME: Should we disable them at remove ? */ + return ata_host_activate(host, dev->irq, ata_interrupt, + IRQF_SHARED, &ninja32_sht); +} + +static const struct pci_device_id ninja32[] = { + { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { }, +}; + +static struct pci_driver ninja32_pci_driver = { + .name = DRV_NAME, + .id_table = ninja32, + .probe = ninja32_init_one, + .remove = ata_pci_remove_one +}; + +static int __init ninja32_init(void) +{ + return pci_register_driver(&ninja32_pci_driver); +} + +static void __exit ninja32_exit(void) +{ + pci_unregister_driver(&ninja32_pci_driver); +} + +MODULE_AUTHOR("Alan Cox"); +MODULE_DESCRIPTION("low-level driver for Ninja32 ATA"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, ninja32); +MODULE_VERSION(DRV_VERSION); + +module_init(ninja32_init); +module_exit(ninja32_exit); |