pata_ninja32: Cardbus ATA initial support

Lots of work needed to bring it up to scratch but it does work so you can
now use the card. That makes it at least useful, especially as the other
cardbus cards are usually INIC162x which aren't yet supported well.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 222 insertions, 0 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index ba63619ae5d..2478cca653d 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -459,6 +459,15 @@ config PATA_NETCELL
 
           If unsure, say N.
 
+config PATA_NINJA32
+        tristate "Ninja32/Delkin Cardbus ATA support (Experimental)"
+        depends on PCI && EXPERIMENTAL
+        help
+          This option enables support for the Ninja32, Delkin and
+          possibly other brands of Cardbus ATA adapter
+
+          If unsure, say N.
+
 config PATA_NS87410
         tristate "Nat Semi NS87410 PATA support (Experimental)"
         depends on PCI && EXPERIMENTAL
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index b13feb2c5da..82550c16818 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_PATA_IT821X)	+= pata_it821x.o
 obj-$(CONFIG_PATA_IT8213)       += pata_it8213.o
 obj-$(CONFIG_PATA_JMICRON)      += pata_jmicron.o
 obj-$(CONFIG_PATA_NETCELL)      += pata_netcell.o
+obj-$(CONFIG_PATA_NINJA32)      += pata_ninja32.o
 obj-$(CONFIG_PATA_NS87410)      += pata_ns87410.o
 obj-$(CONFIG_PATA_NS87415)      += pata_ns87415.o
 obj-$(CONFIG_PATA_OPTI)         += pata_opti.o
diff --git a/drivers/ata/pata_ninja32.c b/drivers/ata/pata_ninja32.c
new file mode 100644
index 00000000000..04acd3f8612
--- /dev/null
+++ b/drivers/ata/pata_ninja32.c
@@ -0,0 +1,212 @@
+/*
+ * 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);