* 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 <asm/io.h>
+#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>
+
+static unsigned long superio_ide_status[2];
+static unsigned long superio_ide_select[2];
+static unsigned long superio_ide_dma_status[2];
+
+#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)
+{
+ if (port == superio_ide_status[0] ||
+ port == superio_ide_status[1] ||
+ port == superio_ide_select[0] ||
+ port == superio_ide_select[1] ||
+ port == superio_ide_dma_status[0] ||
+ port == superio_ide_dma_status[1]) {
+ 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;
+ }
+
+ return inb(port);
+}
+
+static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
+{
+ u32 base, dmabase;
+ u8 tmp;
+ struct pci_dev *pdev = hwif->pci_dev;
+ u8 port = hwif->channel;
+
+ base = pci_resource_start(pdev, port * 2) & ~3;
+ dmabase = pci_resource_start(pdev, 4) & ~3;
+
+ superio_ide_status[port] = base + IDE_STATUS_OFFSET;
+ superio_ide_select[port] = base + IDE_SELECT_OFFSET;
+ superio_ide_dma_status[port] = dmabase + (!port ? 2 : 0xa);
+
+ /* Clear error/interrupt, enable dma */
+ tmp = superio_ide_inb(superio_ide_dma_status[port]);
+ outb(tmp | 0x66, superio_ide_dma_status[port]);
+
+ /* We need to override inb to workaround a SuperIO errata */
+ hwif->INB = superio_ide_inb;
+}
+
+static void __devinit init_iops_ns87415(ide_hwif_t *hwif)
+{
+ if (PCI_SLOT(hwif->pci_dev->devfn) == 0xE) {
+ /* Built-in - assume it's under superio. */
+ superio_ide_init_iops(hwif);
+ }
+}
+#endif
+
static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
/*
return (dma_stat & 7) != 4;
}
-static int ns87415_ide_dma_read (ide_drive_t *drive)
-{
- /* select DMA xfer */
- ns87415_prepare_drive(drive, 1);
- if (!(__ide_dma_read(drive)))
- return 0;
- /* DMA failed: select PIO xfer */
- ns87415_prepare_drive(drive, 0);
- return 1;
-}
-
-static int ns87415_ide_dma_write (ide_drive_t *drive)
+static int ns87415_ide_dma_setup(ide_drive_t *drive)
{
/* select DMA xfer */
ns87415_prepare_drive(drive, 1);
- if (!(__ide_dma_write(drive)))
+ if (!ide_dma_setup(drive))
return 0;
/* DMA failed: select PIO xfer */
ns87415_prepare_drive(drive, 0);
return __ide_dma_check(drive);
}
-static void __init init_hwif_ns87415 (ide_hwif_t *hwif)
+static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
unsigned int ctrl, using_inta;
hwif->autodma = 0;
hwif->selectproc = &ns87415_selectproc;
- /* Set a good latency timer and cache line size value. */
- (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
- /* FIXME: use pci_set_master() to ensure good latency timer value */
-
/*
* We cannot probe for IRQ: both ports share common IRQ on INTA.
* Also, leave IRQ masked during drive probing, to prevent infinite
return;
hwif->OUTB(0x60, hwif->dma_status);
- hwif->ide_dma_read = &ns87415_ide_dma_read;
- hwif->ide_dma_write = &ns87415_ide_dma_write;
+ hwif->dma_setup = &ns87415_ide_dma_setup;
hwif->ide_dma_check = &ns87415_ide_dma_check;
hwif->ide_dma_end = &ns87415_ide_dma_end;
static ide_pci_device_t ns87415_chipset __devinitdata = {
.name = "NS87415",
+#ifdef CONFIG_SUPERIO
+ .init_iops = init_iops_ns87415,
+#endif
.init_hwif = init_hwif_ns87415,
.channels = 2,
.autodma = AUTODMA,
static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
- ide_setup_pci_device(dev, &ns87415_chipset);
- return 0;
+ return ide_setup_pci_device(dev, &ns87415_chipset);
}
static struct pci_device_id ns87415_pci_tbl[] = {
MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
static struct pci_driver driver = {
- .name = "NS87415IDE",
+ .name = "NS87415_IDE",
.id_table = ns87415_pci_tbl,
.probe = ns87415_init_one,
};