[libata] Add a bunch of PATA drivers.

The vast majority of drivers and changes are from Alan Cox.  Albert Lee
contributed and maintains pata_pdc2027x.  Adrian Bunk, Andrew Morton,
and Tejun Heo contributed various minor fixes and updates.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 252 insertions, 0 deletions

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
new file mode 100644
index 000000000000..20b191dcf7ed
--- /dev/null
+++ b/drivers/ata/ata_generic.c
@@ -0,0 +1,252 @@
+/*
+ *  ata_generic.c - Generic PATA/SATA controller driver.
+ *  Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved.
+ *
+ *  Elements from ide/pci/generic.c 
+ *          Copyright (C) 2001-2002     Andre Hedrick <andre@linux-ide.org>
+ *          Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *  
+ *  Driver for PCI IDE interfaces implementing the standard bus mastering
+ *  interface functionality. This assumes the BIOS did the drive set up and
+ *  tuning for us. By default we do not grab all IDE class devices as they
+ *  may have other drivers or need fixups to avoid problems. Instead we keep
+ *  a default list of stuff without documentation/driver that appears to
+ *  work.  
+ */
+
+#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 "ata_generic"
+#define DRV_VERSION "0.2.6"
+
+/*
+ *      A generic parallel ATA driver using libata
+ */
+
+/**
+ *      generic_pre_reset               -       probe begin
+ *      @ap: ATA port
+ *
+ *      Set up cable type and use generic probe init
+ */
+ 
+static int generic_pre_reset(struct ata_port *ap)
+{
+        ap->cbl = ATA_CBL_PATA80;
+        return ata_std_prereset(ap);
+}
+
+
+/**
+ *      generic_error_handler - Probe specified port on PATA host controller
+ *      @ap: Port to probe
+ *      @classes:
+ *
+ *      LOCKING:
+ *      None (inherited from caller).
+ */
+
+ 
+static void generic_error_handler(struct ata_port *ap)
+{
+        ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ *      generic_set_mode        -       mode setting
+ *      @ap: interface to set up
+ *
+ *      Use a non standard set_mode function. We don't want to be tuned.
+ *      The BIOS configured everything. Our job is not to fiddle. We
+ *      read the dma enabled bits from the PCI configuration of the device
+ *      and respect them. 
+ */
+ 
+static void generic_set_mode(struct ata_port *ap)
+{
+        int dma_enabled = 0;
+        int i;
+
+        /* Bits 5 and 6 indicate if DMA is active on master/slave */
+        if (ap->ioaddr.bmdma_addr)
+                dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
+        
+        for (i = 0; i < ATA_MAX_DEVICES; i++) {
+                struct ata_device *dev = &ap->device[i];
+                if (ata_dev_enabled(dev)) {
+                        /* We don't really care */
+                        dev->pio_mode = XFER_PIO_0;
+                        dev->dma_mode = XFER_MW_DMA_0;
+                        /* We do need the right mode information for DMA or PIO 
+                           and this comes from the current configuration flags */
+                        if (dma_enabled & (1 << (5 + i))) {
+                                dev->xfer_mode = XFER_MW_DMA_0;
+                                dev->xfer_shift = ATA_SHIFT_MWDMA;
+                                dev->flags &= ~ATA_DFLAG_PIO;
+                        } else {
+                                dev->xfer_mode = XFER_PIO_0;
+                                dev->xfer_shift = ATA_SHIFT_PIO;
+                                dev->flags |= ATA_DFLAG_PIO;
+                        }
+                }
+        }
+}
+
+static struct scsi_host_template generic_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,
+        .max_sectors            = ATA_MAX_SECTORS,
+        .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,
+        .bios_param             = ata_std_bios_param,
+};
+
+static struct ata_port_operations generic_port_ops = {
+        .set_mode       = generic_set_mode,
+        
+        .port_disable   = ata_port_disable,
+        .tf_load        = ata_tf_load,
+        .tf_read        = ata_tf_read,
+        .check_status   = ata_check_status,
+        .exec_command   = ata_exec_command,
+        .dev_select     = ata_std_dev_select,
+
+        .bmdma_setup    = ata_bmdma_setup,
+        .bmdma_start    = ata_bmdma_start,
+        .bmdma_stop     = ata_bmdma_stop,
+        .bmdma_status   = ata_bmdma_status,
+        
+        .data_xfer      = ata_pio_data_xfer,
+
+        .freeze         = ata_bmdma_freeze,
+        .thaw           = ata_bmdma_thaw,
+        .error_handler  = generic_error_handler,
+        .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+        .qc_prep        = ata_qc_prep,
+        .qc_issue       = ata_qc_issue_prot,
+        .eng_timeout    = ata_eng_timeout,
+        .irq_handler    = ata_interrupt,
+        .irq_clear      = ata_bmdma_irq_clear,
+
+        .port_start     = ata_port_start,
+        .port_stop      = ata_port_stop,
+        .host_stop      = ata_host_stop
+};      
+        
+static int all_generic_ide;             /* Set to claim all devices */
+
+/**
+ *      ata_generic_init                -       attach generic IDE
+ *      @dev: PCI device found
+ *      @id: match entry
+ *
+ *      Called each time a matching IDE interface is found. We check if the
+ *      interface is one we wish to claim and if so we perform any chip 
+ *      specific hacks then let the ATA layer do the heavy lifting.
+ */
+ 
+static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        u16 command;
+        static struct ata_port_info info = {
+                .sht = &generic_sht,
+                .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+                .pio_mask = 0x1f,
+                .mwdma_mask = 0x07,
+                .udma_mask = 0x3f,
+                .port_ops = &generic_port_ops
+        };
+        static struct ata_port_info *port_info[2] = { &info, &info };
+                
+        /* Don't use the generic entry unless instructed to do so */
+        if (id->driver_data == 1 && all_generic_ide == 0)
+                return -ENODEV;
+
+        /* Devices that need care */
+        if (dev->vendor == PCI_VENDOR_ID_UMC &&
+            dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
+            (!(PCI_FUNC(dev->devfn) & 1)))
+                return -ENODEV;
+
+        if (dev->vendor == PCI_VENDOR_ID_OPTI &&
+            dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
+            (!(PCI_FUNC(dev->devfn) & 1)))
+                return -ENODEV;
+
+        /* Don't re-enable devices in generic mode or we will break some
+           motherboards with disabled and unused IDE controllers */
+        pci_read_config_word(dev, PCI_COMMAND, &command);
+        if (!(command & PCI_COMMAND_IO))
+                return -ENODEV;
+                
+        if (dev->vendor == PCI_VENDOR_ID_AL)
+                ata_pci_clear_simplex(dev);
+
+        return ata_pci_init_one(dev, port_info, 2);
+}
+
+static struct pci_device_id ata_generic[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
+        { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
+        { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), }, 
+        { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
+        { PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
+        { PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
+        { PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
+        { PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
+        /* Must come last. If you add entries adjust this table appropriately */
+        { PCI_ANY_ID,           PCI_ANY_ID,                        PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
+        { 0, },
+};
+
+static struct pci_driver ata_generic_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = ata_generic,
+        .probe          = ata_generic_init_one,
+        .remove         = ata_pci_remove_one
+};
+
+static int __init ata_generic_init(void)
+{
+        return pci_module_init(&ata_generic_pci_driver);
+}
+
+
+static void __exit ata_generic_exit(void)
+{
+        pci_unregister_driver(&ata_generic_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for generic ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ata_generic);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(ata_generic_init);
+module_exit(ata_generic_exit);
+
+module_param(all_generic_ide, int, 0);