1 files changed, 366 insertions, 0 deletions

diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c
new file mode 100644
index 000000000000..13789060f407
--- /dev/null
+++ b/drivers/ide/ns87415.c
@@ -0,0 +1,366 @@
+/*
+ * Copyright (C) 1997-1998      Mark Lord <mlord@pobox.com>
+ * Copyright (C) 1998           Eddie C. Dost <ecd@skynet.be>
+ * Copyright (C) 1999-2000      Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2004           Grant Grundler <grundler at parisc-linux.org>
+ *
+ * Inspired by an earlier effort from David S. Miller <davem@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "ns87415"
+
+#ifdef CONFIG_SUPERIO
+/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
+ * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
+ * which use the integrated NS87514 cell for CD-ROM support.
+ * i.e we have to support for CD-ROM installs.
+ * See drivers/parisc/superio.c for more gory details.
+ */
+#include <asm/superio.h>
+
+#define SUPERIO_IDE_MAX_RETRIES 25
+
+/* Because of a defect in Super I/O, all reads of the PCI DMA status 
+ * registers, IDE status register and the IDE select register need to be 
+ * retried
+ */
+static u8 superio_ide_inb (unsigned long port)
+{
+        u8 tmp;
+        int retries = SUPERIO_IDE_MAX_RETRIES;
+
+        /* printk(" [ reading port 0x%x with retry ] ", port); */
+
+        do {
+                tmp = inb(port);
+                if (tmp == 0)
+                        udelay(50);
+        } while (tmp == 0 && retries-- > 0);
+
+        return tmp;
+}
+
+static u8 superio_read_status(ide_hwif_t *hwif)
+{
+        return superio_ide_inb(hwif->io_ports.status_addr);
+}
+
+static u8 superio_read_sff_dma_status(ide_hwif_t *hwif)
+{
+        return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static void superio_tf_read(ide_drive_t *drive, ide_task_t *task)
+{
+        struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+        struct ide_taskfile *tf = &task->tf;
+
+        if (task->tf_flags & IDE_TFLAG_IN_DATA) {
+                u16 data = inw(io_ports->data_addr);
+
+                tf->data = data & 0xff;
+                tf->hob_data = (data >> 8) & 0xff;
+        }
+
+        /* be sure we're looking at the low order bits */
+        outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+
+        if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
+                tf->feature = inb(io_ports->feature_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_NSECT)
+                tf->nsect  = inb(io_ports->nsect_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAL)
+                tf->lbal   = inb(io_ports->lbal_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAM)
+                tf->lbam   = inb(io_ports->lbam_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_LBAH)
+                tf->lbah   = inb(io_ports->lbah_addr);
+        if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
+                tf->device = superio_ide_inb(io_ports->device_addr);
+
+        if (task->tf_flags & IDE_TFLAG_LBA48) {
+                outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
+                        tf->hob_feature = inb(io_ports->feature_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
+                        tf->hob_nsect   = inb(io_ports->nsect_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
+                        tf->hob_lbal    = inb(io_ports->lbal_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
+                        tf->hob_lbam    = inb(io_ports->lbam_addr);
+                if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
+                        tf->hob_lbah    = inb(io_ports->lbah_addr);
+        }
+}
+
+static const struct ide_tp_ops superio_tp_ops = {
+        .exec_command           = ide_exec_command,
+        .read_status            = superio_read_status,
+        .read_altstatus         = ide_read_altstatus,
+        .read_sff_dma_status    = superio_read_sff_dma_status,
+
+        .set_irq                = ide_set_irq,
+
+        .tf_load                = ide_tf_load,
+        .tf_read                = superio_tf_read,
+
+        .input_data             = ide_input_data,
+        .output_data            = ide_output_data,
+};
+
+static void __devinit superio_init_iops(struct hwif_s *hwif)
+{
+        struct pci_dev *pdev = to_pci_dev(hwif->dev);
+        u32 dma_stat;
+        u8 port = hwif->channel, tmp;
+
+        dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa);
+
+        /* Clear error/interrupt, enable dma */
+        tmp = superio_ide_inb(dma_stat);
+        outb(tmp | 0x66, dma_stat);
+}
+#endif
+
+static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
+
+/*
+ * This routine either enables/disables (according to IDE_DFLAG_PRESENT)
+ * the IRQ associated with the port (HWIF(drive)),
+ * and selects either PIO or DMA handshaking for the next I/O operation.
+ */
+static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
+{
+        ide_hwif_t *hwif = HWIF(drive);
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
+        unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        new = *old;
+
+        /* Adjust IRQ enable bit */
+        bit = 1 << (8 + hwif->channel);
+
+        if (drive->dev_flags & IDE_DFLAG_PRESENT)
+                new &= ~bit;
+        else
+                new |= bit;
+
+        /* Select PIO or DMA, DMA may only be selected for one drive/channel. */
+        bit   = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1));
+        other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1));
+        new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
+
+        if (new != *old) {
+                unsigned char stat;
+
+                /*
+                 * Don't change DMA engine settings while Write Buffers
+                 * are busy.
+                 */
+                (void) pci_read_config_byte(dev, 0x43, &stat);
+                while (stat & 0x03) {
+                        udelay(1);
+                        (void) pci_read_config_byte(dev, 0x43, &stat);
+                }
+
+                *old = new;
+                (void) pci_write_config_dword(dev, 0x40, new);
+
+                /*
+                 * And let things settle...
+                 */
+                udelay(10);
+        }
+
+        local_irq_restore(flags);
+}
+
+static void ns87415_selectproc (ide_drive_t *drive)
+{
+        ns87415_prepare_drive(drive,
+                              !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
+}
+
+static int ns87415_dma_end(ide_drive_t *drive)
+{
+        ide_hwif_t      *hwif = HWIF(drive);
+        u8 dma_stat = 0, dma_cmd = 0;
+
+        drive->waiting_for_dma = 0;
+        dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        /* get DMA command mode */
+        dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+        /* stop DMA */
+        outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+        /* from ERRATA: clear the INTR & ERROR bits */
+        dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+        outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
+        /* and free any DMA resources */
+        ide_destroy_dmatable(drive);
+        /* verify good DMA status */
+        return (dma_stat & 7) != 4;
+}
+
+static int ns87415_dma_setup(ide_drive_t *drive)
+{
+        /* select DMA xfer */
+        ns87415_prepare_drive(drive, 1);
+        if (!ide_dma_setup(drive))
+                return 0;
+        /* DMA failed: select PIO xfer */
+        ns87415_prepare_drive(drive, 0);
+        return 1;
+}
+
+static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
+{
+        struct pci_dev *dev = to_pci_dev(hwif->dev);
+        unsigned int ctrl, using_inta;
+        u8 progif;
+#ifdef __sparc_v9__
+        int timeout;
+        u8 stat;
+#endif
+
+        /*
+         * We cannot probe for IRQ: both ports share common IRQ on INTA.
+         * Also, leave IRQ masked during drive probing, to prevent infinite
+         * interrupts from a potentially floating INTA..
+         *
+         * IRQs get unmasked in selectproc when drive is first used.
+         */
+        (void) pci_read_config_dword(dev, 0x40, &ctrl);
+        (void) pci_read_config_byte(dev, 0x09, &progif);
+        /* is irq in "native" mode? */
+        using_inta = progif & (1 << (hwif->channel << 1));
+        if (!using_inta)
+                using_inta = ctrl & (1 << (4 + hwif->channel));
+        if (hwif->mate) {
+                hwif->select_data = hwif->mate->select_data;
+        } else {
+                hwif->select_data = (unsigned long)
+                                        &ns87415_control[ns87415_count++];
+                ctrl |= (1 << 8) | (1 << 9);    /* mask both IRQs */
+                if (using_inta)
+                        ctrl &= ~(1 << 6);      /* unmask INTA */
+                *((unsigned int *)hwif->select_data) = ctrl;
+                (void) pci_write_config_dword(dev, 0x40, ctrl);
+
+                /*
+                 * Set prefetch size to 512 bytes for both ports,
+                 * but don't turn on/off prefetching here.
+                 */
+                pci_write_config_byte(dev, 0x55, 0xee);
+
+#ifdef __sparc_v9__
+                /*
+                 * XXX: Reset the device, if we don't it will not respond to
+                 *      SELECT_DRIVE() properly during first ide_probe_port().
+                 */
+                timeout = 10000;
+                outb(12, hwif->io_ports.ctl_addr);
+                udelay(10);
+                outb(8, hwif->io_ports.ctl_addr);
+                do {
+                        udelay(50);
+                        stat = hwif->tp_ops->read_status(hwif);
+                        if (stat == 0xff)
+                                break;
+                } while ((stat & ATA_BUSY) && --timeout);
+#endif
+        }
+
+        if (!using_inta)
+                hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
+        else if (!hwif->irq && hwif->mate && hwif->mate->irq)
+                hwif->irq = hwif->mate->irq;    /* share IRQ with mate */
+
+        if (!hwif->dma_base)
+                return;
+
+        outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static const struct ide_port_ops ns87415_port_ops = {
+        .selectproc             = ns87415_selectproc,
+};
+
+static const struct ide_dma_ops ns87415_dma_ops = {
+        .dma_host_set           = ide_dma_host_set,
+        .dma_setup              = ns87415_dma_setup,
+        .dma_exec_cmd           = ide_dma_exec_cmd,
+        .dma_start              = ide_dma_start,
+        .dma_end                = ns87415_dma_end,
+        .dma_test_irq           = ide_dma_test_irq,
+        .dma_lost_irq           = ide_dma_lost_irq,
+        .dma_timeout            = ide_dma_timeout,
+};
+
+static const struct ide_port_info ns87415_chipset __devinitdata = {
+        .name           = DRV_NAME,
+        .init_hwif      = init_hwif_ns87415,
+        .port_ops       = &ns87415_port_ops,
+        .dma_ops        = &ns87415_dma_ops,
+        .host_flags     = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+                          IDE_HFLAG_NO_ATAPI_DMA,
+};
+
+static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        struct ide_port_info d = ns87415_chipset;
+
+#ifdef CONFIG_SUPERIO
+        if (PCI_SLOT(dev->devfn) == 0xE) {
+                /* Built-in - assume it's under superio. */
+                d.init_iops = superio_init_iops;
+                d.tp_ops = &superio_tp_ops;
+        }
+#endif
+        return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id ns87415_pci_tbl[] = {
+        { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
+        { 0, },
+};
+MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
+
+static struct pci_driver ns87415_pci_driver = {
+        .name           = "NS87415_IDE",
+        .id_table       = ns87415_pci_tbl,
+        .probe          = ns87415_init_one,
+        .remove         = ide_pci_remove,
+        .suspend        = ide_pci_suspend,
+        .resume         = ide_pci_resume,
+};
+
+static int __init ns87415_ide_init(void)
+{
+        return ide_pci_register_driver(&ns87415_pci_driver);
+}
+
+static void __exit ns87415_ide_exit(void)
+{
+        pci_unregister_driver(&ns87415_pci_driver);
+}
+
+module_init(ns87415_ide_init);
+module_exit(ns87415_ide_exit);
+
+MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
+MODULE_LICENSE("GPL");