--- /dev/null
+/*
+ * 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_dma_sff_read_status(ide_hwif_t *hwif)
+{
+ return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf,
+ u8 valid)
+{
+ struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+
+ if (valid & IDE_VALID_ERROR)
+ tf->error = inb(io_ports->feature_addr);
+ if (valid & IDE_VALID_NSECT)
+ tf->nsect = inb(io_ports->nsect_addr);
+ if (valid & IDE_VALID_LBAL)
+ tf->lbal = inb(io_ports->lbal_addr);
+ if (valid & IDE_VALID_LBAM)
+ tf->lbam = inb(io_ports->lbam_addr);
+ if (valid & IDE_VALID_LBAH)
+ tf->lbah = inb(io_ports->lbah_addr);
+ if (valid & IDE_VALID_DEVICE)
+ tf->device = superio_ide_inb(io_ports->device_addr);
+}
+
+static void ns87415_dev_select(ide_drive_t *drive);
+
+static const struct ide_tp_ops superio_tp_ops = {
+ .exec_command = ide_exec_command,
+ .read_status = superio_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .write_devctl = ide_write_devctl,
+
+ .dev_select = ns87415_dev_select,
+ .tf_load = ide_tf_load,
+ .tf_read = superio_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
+
+static void 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);
+}
+#else
+#define superio_dma_sff_read_status ide_dma_sff_read_status
+#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,
+ * 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 = drive->hwif;
+ 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_dev_select(ide_drive_t *drive)
+{
+ ns87415_prepare_drive(drive,
+ !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
+
+ outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
+}
+
+static void ns87415_dma_start(ide_drive_t *drive)
+{
+ ns87415_prepare_drive(drive, 1);
+ ide_dma_start(drive);
+}
+
+static int ns87415_dma_end(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 dma_stat = 0, dma_cmd = 0;
+
+ dma_stat = hwif->dma_ops->dma_sff_read_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);
+
+ ns87415_prepare_drive(drive, 0);
+
+ /* verify good DMA status */
+ return (dma_stat & 7) != 4;
+}
+
+static void 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 dev_select() 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
+ * dev_select() 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 = pci_get_legacy_ide_irq(dev, hwif->channel);
+
+ if (!hwif->dma_base)
+ return;
+
+ outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static const struct ide_tp_ops ns87415_tp_ops = {
+ .exec_command = ide_exec_command,
+ .read_status = ide_read_status,
+ .read_altstatus = ide_read_altstatus,
+ .write_devctl = ide_write_devctl,
+
+ .dev_select = ns87415_dev_select,
+ .tf_load = ide_tf_load,
+ .tf_read = ide_tf_read,
+
+ .input_data = ide_input_data,
+ .output_data = ide_output_data,
+};
+
+static const struct ide_dma_ops ns87415_dma_ops = {
+ .dma_host_set = ide_dma_host_set,
+ .dma_setup = ide_dma_setup,
+ .dma_start = ns87415_dma_start,
+ .dma_end = ns87415_dma_end,
+ .dma_test_irq = ide_dma_test_irq,
+ .dma_lost_irq = ide_dma_lost_irq,
+ .dma_timer_expiry = ide_dma_sff_timer_expiry,
+ .dma_sff_read_status = superio_dma_sff_read_status,
+};
+
+static const struct ide_port_info ns87415_chipset = {
+ .name = DRV_NAME,
+ .init_hwif = init_hwif_ns87415,
+ .tp_ops = &ns87415_tp_ops,
+ .dma_ops = &ns87415_dma_ops,
+ .host_flags = IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+ IDE_HFLAG_NO_ATAPI_DMA,
+};
+
+static int 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");
Code Review / kvmfornfv.git / blobdiff