From: root <root@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
---
drivers/scsi/Kconfig | 9 ++
drivers/scsi/Makefile | 2
drivers/scsi/ata_generic.c | 256 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 267 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/ata_generic.c
9027b93110c628892846cacf1ca9875132e2d83b
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 13c5943..fd6a545 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -577,6 +577,15 @@ config SCSI_PATA_EFAR
If unsure, say N.
+config SCSI_ATA_GENERIC
+ tristate "Generic PATA support"
+ depends on SCSI_SATA && PCI
+ help
+ This option enables support for generic BIOS configured
+ PATA controllers via the new ATA layer
+
+ If unsure, say N.
+
config SCSI_PATA_HPT366
tristate "HPT 366/368 PATA support (Very Experimental)"
depends on SCSI_SATA && PCI && EXPERIMENTAL
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 0031c76..3654dab 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -174,6 +174,8 @@ obj-$(CONFIG_SCSI_SATA_NV) += libata.o s
obj-$(CONFIG_SCSI_SATA_ULI) += libata.o sata_uli.o
obj-$(CONFIG_SCSI_SATA_MV) += libata.o sata_mv.o
obj-$(CONFIG_SCSI_PDC_ADMA) += libata.o pdc_adma.o
+# Should be last but one libata driver
+obj-$(CONFIG_SCSI_ATA_GENERIC) += libata.o ata_generic.o
# Should be last libata driver
obj-$(CONFIG_SCSI_PATA_LEGACY) += libata.o pata_legacy.o
obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o
diff --git a/drivers/scsi/ata_generic.c b/drivers/scsi/ata_generic.c
new file mode 100644
index 0000000..6df7ca5
--- /dev/null
+++ b/drivers/scsi/ata_generic.c
@@ -0,0 +1,256 @@
+/*
+ * ata_generic.c - Generic PATA/SATA controller driver.
+ * Copyright 2005 Red Hat Inc <alan@xxxxxxxxxx>, all rights reserved.
+ *
+ * Elements from ide/pci/generic.c
+ * Copyright (C) 2001-2002 Andre Hedrick <andre@xxxxxxxxxxxxx>
+ * Portions (C) Copyright 2002 Red Hat Inc <alan@xxxxxxxxxx>
+ *
+ * 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.h"
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "ata_generic"
+#define DRV_VERSION "0.2.4"
+
+/*
+ * A generic parallel ATA driver using libata
+ */
+
+/**
+ * genpata_pre_reset - probe begin
+ * @ap: ATA port
+ *
+ * Set up cable type and use generic probe init
+ */
+
+static int genpata_pre_reset(struct ata_port *ap)
+{
+ ap->cbl = ATA_CBL_PATA80;
+ return ata_std_prereset(ap);
+}
+
+
+/**
+ * genpata_error_handler - Probe specified port on PATA host controller
+ * @ap: Port to probe
+ * @classes:
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+
+static void genpata_error_handler(struct ata_port *ap)
+{
+ ata_bmdma_drive_eh(ap, genpata_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ * genpata_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 genpata_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 */
+ /* FIXME: at some point in the future this should become
+ a library helper which reads the disk modes from the
+ disk as well */
+ 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 genpata_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 genpata_port_ops = {
+ .set_mode = genpata_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 = genpata_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 */
+
+/**
+ * pata_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 pata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ u16 command;
+ static struct ata_port_info info = {
+ .sht = &genpata_sht,
+ .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .udma_mask = 0x3f,
+ .port_ops = &genpata_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 pata_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 pata_generic_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = pata_generic,
+ .probe = pata_generic_init_one,
+ .remove = ata_pci_remove_one
+};
+
+static int __init pata_generic_init(void)
+{
+ return pci_module_init(&pata_generic_pci_driver);
+}
+
+
+static void __exit pata_generic_exit(void)
+{
+ pci_unregister_driver(&pata_generic_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for generic ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pata_generic);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(pata_generic_init);
+module_exit(pata_generic_exit);
+
+module_param(all_generic_ide, int, 0);
--
1.2.GIT
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