Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1094 insertions, 0 deletions

diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
new file mode 100644
index 000000000..e33036281
--- /dev/null
+++ b/drivers/parisc/dino.c
@@ -0,0 +1,1094 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+**	DINO manager
+**
+**	(c) Copyright 1999 Red Hat Software
+**	(c) Copyright 1999 SuSE GmbH
+**	(c) Copyright 1999,2000 Hewlett-Packard Company
+**	(c) Copyright 2000 Grant Grundler
+**	(c) Copyright 2006-2019 Helge Deller
+**
+**
+**	This module provides access to Dino PCI bus (config/IOport spaces)
+**	and helps manage Dino IRQ lines.
+**
+**	Dino interrupt handling is a bit complicated.
+**	Dino always writes to the broadcast EIR via irr0 for now.
+**	(BIG WARNING: using broadcast EIR is a really bad thing for SMP!)
+**	Only one processor interrupt is used for the 11 IRQ line 
+**	inputs to dino.
+**
+**	The different between Built-in Dino and Card-Mode
+**	dino is in chip initialization and pci device initialization.
+**
+**	Linux drivers can only use Card-Mode Dino if pci devices I/O port
+**	BARs are configured and used by the driver. Programming MMIO address 
+**	requires substantial knowledge of available Host I/O address ranges
+**	is currently not supported.  Port/Config accessor functions are the
+**	same. "BIOS" differences are handled within the existing routines.
+*/
+
+/*	Changes :
+**	2001-06-14 : Clement Moyroud (moyroudc@esiee.fr)
+**		- added support for the integrated RS232. 	
+*/
+
+/*
+** TODO: create a virtual address for each Dino HPA.
+**       GSC code might be able to do this since IODC data tells us
+**       how many pages are used. PCI subsystem could (must?) do this
+**       for PCI drivers devices which implement/use MMIO registers.
+*/
+
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>	/* for struct irqaction */
+#include <linux/spinlock.h>	/* for spinlock_t and prototypes */
+
+#include <asm/pdc.h>
+#include <asm/page.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+
+#include "gsc.h"
+#include "iommu.h"
+
+#undef DINO_DEBUG
+
+#ifdef DINO_DEBUG
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif
+
+/*
+** Config accessor functions only pass in the 8-bit bus number
+** and not the 8-bit "PCI Segment" number. Each Dino will be
+** assigned a PCI bus number based on "when" it's discovered.
+**
+** The "secondary" bus number is set to this before calling
+** pci_scan_bus(). If any PPB's are present, the scan will
+** discover them and update the "secondary" and "subordinate"
+** fields in Dino's pci_bus structure.
+**
+** Changes in the configuration *will* result in a different
+** bus number for each dino.
+*/
+
+#define is_card_dino(id)	((id)->hw_type == HPHW_A_DMA)
+#define is_cujo(id)		((id)->hversion == 0x682)
+
+#define DINO_IAR0		0x004
+#define DINO_IODC_ADDR		0x008
+#define DINO_IODC_DATA_0	0x008
+#define DINO_IODC_DATA_1	0x008
+#define DINO_IRR0		0x00C
+#define DINO_IAR1		0x010
+#define DINO_IRR1		0x014
+#define DINO_IMR		0x018
+#define DINO_IPR		0x01C
+#define DINO_TOC_ADDR		0x020
+#define DINO_ICR		0x024
+#define DINO_ILR		0x028
+#define DINO_IO_COMMAND		0x030
+#define DINO_IO_STATUS		0x034
+#define DINO_IO_CONTROL		0x038
+#define DINO_IO_GSC_ERR_RESP	0x040
+#define DINO_IO_ERR_INFO	0x044
+#define DINO_IO_PCI_ERR_RESP	0x048
+#define DINO_IO_FBB_EN		0x05c
+#define DINO_IO_ADDR_EN		0x060
+#define DINO_PCI_ADDR		0x064
+#define DINO_CONFIG_DATA	0x068
+#define DINO_IO_DATA		0x06c
+#define DINO_MEM_DATA		0x070	/* Dino 3.x only */
+#define DINO_GSC2X_CONFIG	0x7b4
+#define DINO_GMASK		0x800
+#define DINO_PAMR		0x804
+#define DINO_PAPR		0x808
+#define DINO_DAMODE		0x80c
+#define DINO_PCICMD		0x810
+#define DINO_PCISTS		0x814
+#define DINO_MLTIM		0x81c
+#define DINO_BRDG_FEAT		0x820
+#define DINO_PCIROR		0x824
+#define DINO_PCIWOR		0x828
+#define DINO_TLTIM		0x830
+
+#define DINO_IRQS 11		/* bits 0-10 are architected */
+#define DINO_IRR_MASK	0x5ff	/* only 10 bits are implemented */
+#define DINO_LOCAL_IRQS (DINO_IRQS+1)
+
+#define DINO_MASK_IRQ(x)	(1<<(x))
+
+#define PCIINTA   0x001
+#define PCIINTB   0x002
+#define PCIINTC   0x004
+#define PCIINTD   0x008
+#define PCIINTE   0x010
+#define PCIINTF   0x020
+#define GSCEXTINT 0x040
+/* #define xxx       0x080 - bit 7 is "default" */
+/* #define xxx    0x100 - bit 8 not used */
+/* #define xxx    0x200 - bit 9 not used */
+#define RS232INT  0x400
+
+struct dino_device
+{
+	struct pci_hba_data	hba;	/* 'C' inheritance - must be first */
+	spinlock_t		dinosaur_pen;
+	u32 			imr;	  /* IRQ's which are enabled */ 
+	struct gsc_irq		gsc_irq;
+	int			global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */
+#ifdef DINO_DEBUG
+	unsigned int		dino_irr0; /* save most recent IRQ line stat */
+#endif
+};
+
+static inline struct dino_device *DINO_DEV(struct pci_hba_data *hba)
+{
+	return container_of(hba, struct dino_device, hba);
+}
+
+/*
+ * Dino Configuration Space Accessor Functions
+ */
+
+#define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
+
+/*
+ * keep the current highest bus count to assist in allocating busses.  This
+ * tries to keep a global bus count total so that when we discover an 
+ * entirely new bus, it can be given a unique bus number.
+ */
+static int dino_current_bus = 0;
+
+static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
+		int size, u32 *val)
+{
+	struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
+	u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
+	u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
+	void __iomem *base_addr = d->hba.base_addr;
+	unsigned long flags;
+
+	DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
+									size);
+	spin_lock_irqsave(&d->dinosaur_pen, flags);
+
+	/* tell HW which CFG address */
+	__raw_writel(v, base_addr + DINO_PCI_ADDR);
+
+	/* generate cfg read cycle */
+	if (size == 1) {
+		*val = readb(base_addr + DINO_CONFIG_DATA + (where & 3));
+	} else if (size == 2) {
+		*val = readw(base_addr + DINO_CONFIG_DATA + (where & 2));
+	} else if (size == 4) {
+		*val = readl(base_addr + DINO_CONFIG_DATA);
+	}
+
+	spin_unlock_irqrestore(&d->dinosaur_pen, flags);
+	return 0;
+}
+
+/*
+ * Dino address stepping "feature":
+ * When address stepping, Dino attempts to drive the bus one cycle too soon
+ * even though the type of cycle (config vs. MMIO) might be different. 
+ * The read of Ven/Prod ID is harmless and avoids Dino's address stepping.
+ */
+static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
+	int size, u32 val)
+{
+	struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
+	u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
+	u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
+	void __iomem *base_addr = d->hba.base_addr;
+	unsigned long flags;
+
+	DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
+									size);
+	spin_lock_irqsave(&d->dinosaur_pen, flags);
+
+	/* avoid address stepping feature */
+	__raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
+	__raw_readl(base_addr + DINO_CONFIG_DATA);
+
+	/* tell HW which CFG address */
+	__raw_writel(v, base_addr + DINO_PCI_ADDR);
+	/* generate cfg read cycle */
+	if (size == 1) {
+		writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3));
+	} else if (size == 2) {
+		writew(val, base_addr + DINO_CONFIG_DATA + (where & 2));
+	} else if (size == 4) {
+		writel(val, base_addr + DINO_CONFIG_DATA);
+	}
+
+	spin_unlock_irqrestore(&d->dinosaur_pen, flags);
+	return 0;
+}
+
+static struct pci_ops dino_cfg_ops = {
+	.read =		dino_cfg_read,
+	.write =	dino_cfg_write,
+};
+
+
+/*
+ * Dino "I/O Port" Space Accessor Functions
+ *
+ * Many PCI devices don't require use of I/O port space (eg Tulip,
+ * NCR720) since they export the same registers to both MMIO and
+ * I/O port space.  Performance is going to stink if drivers use
+ * I/O port instead of MMIO.
+ */
+
+#define DINO_PORT_IN(type, size, mask) \
+static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
+{ \
+	u##size v; \
+	unsigned long flags; \
+	spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
+	/* tell HW which IO Port address */ \
+	__raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
+	/* generate I/O PORT read cycle */ \
+	v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
+	spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
+	return v; \
+}
+
+DINO_PORT_IN(b,  8, 3)
+DINO_PORT_IN(w, 16, 2)
+DINO_PORT_IN(l, 32, 0)
+
+#define DINO_PORT_OUT(type, size, mask) \
+static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
+{ \
+	unsigned long flags; \
+	spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
+	/* tell HW which IO port address */ \
+	__raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
+	/* generate cfg write cycle */ \
+	write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \
+	spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
+}
+
+DINO_PORT_OUT(b,  8, 3)
+DINO_PORT_OUT(w, 16, 2)
+DINO_PORT_OUT(l, 32, 0)
+
+static struct pci_port_ops dino_port_ops = {
+	.inb	= dino_in8,
+	.inw	= dino_in16,
+	.inl	= dino_in32,
+	.outb	= dino_out8,
+	.outw	= dino_out16,
+	.outl	= dino_out32
+};
+
+static void dino_mask_irq(struct irq_data *d)
+{
+	struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
+	int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
+
+	DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq);
+
+	/* Clear the matching bit in the IMR register */
+	dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
+	__raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
+}
+
+static void dino_unmask_irq(struct irq_data *d)
+{
+	struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
+	int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
+	u32 tmp;
+
+	DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq);
+
+	/*
+	** clear pending IRQ bits
+	**
+	** This does NOT change ILR state!
+	** See comment below for ILR usage.
+	*/
+	__raw_readl(dino_dev->hba.base_addr+DINO_IPR);
+
+	/* set the matching bit in the IMR register */
+	dino_dev->imr |= DINO_MASK_IRQ(local_irq);	/* used in dino_isr() */
+	__raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
+
+	/* Emulate "Level Triggered" Interrupt
+	** Basically, a driver is blowing it if the IRQ line is asserted
+	** while the IRQ is disabled.  But tulip.c seems to do that....
+	** Give 'em a kluge award and a nice round of applause!
+	**
+	** The gsc_write will generate an interrupt which invokes dino_isr().
+	** dino_isr() will read IPR and find nothing. But then catch this
+	** when it also checks ILR.
+	*/
+	tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR);
+	if (tmp & DINO_MASK_IRQ(local_irq)) {
+		DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
+				__func__, tmp);
+		gsc_writel(dino_dev->gsc_irq.txn_data, dino_dev->gsc_irq.txn_addr);
+	}
+}
+
+#ifdef CONFIG_SMP
+static int dino_set_affinity_irq(struct irq_data *d, const struct cpumask *dest,
+				bool force)
+{
+	struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
+	struct cpumask tmask;
+	int cpu_irq;
+	u32 eim;
+
+	if (!cpumask_and(&tmask, dest, cpu_online_mask))
+		return -EINVAL;
+
+	cpu_irq = cpu_check_affinity(d, &tmask);
+	if (cpu_irq < 0)
+		return cpu_irq;
+
+	dino_dev->gsc_irq.txn_addr = txn_affinity_addr(d->irq, cpu_irq);
+	eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data;
+	__raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
+
+	irq_data_update_effective_affinity(d, &tmask);
+
+	return IRQ_SET_MASK_OK;
+}
+#endif
+
+static struct irq_chip dino_interrupt_type = {
+	.name		= "GSC-PCI",
+	.irq_unmask	= dino_unmask_irq,
+	.irq_mask	= dino_mask_irq,
+#ifdef CONFIG_SMP
+	.irq_set_affinity = dino_set_affinity_irq,
+#endif
+};
+
+
+/*
+ * Handle a Processor interrupt generated by Dino.
+ *
+ * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
+ * wedging the CPU. Could be removed or made optional at some point.
+ */
+static irqreturn_t dino_isr(int irq, void *intr_dev)
+{
+	struct dino_device *dino_dev = intr_dev;
+	u32 mask;
+	int ilr_loop = 100;
+
+	/* read and acknowledge pending interrupts */
+#ifdef DINO_DEBUG
+	dino_dev->dino_irr0 =
+#endif
+	mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
+
+	if (mask == 0)
+		return IRQ_NONE;
+
+ilr_again:
+	do {
+		int local_irq = __ffs(mask);
+		int irq = dino_dev->global_irq[local_irq];
+		DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
+			__func__, irq, intr_dev, mask);
+		generic_handle_irq(irq);
+		mask &= ~DINO_MASK_IRQ(local_irq);
+	} while (mask);
+
+	/* Support for level triggered IRQ lines.
+	** 
+	** Dropping this support would make this routine *much* faster.
+	** But since PCI requires level triggered IRQ line to share lines...
+	** device drivers may assume lines are level triggered (and not
+	** edge triggered like EISA/ISA can be).
+	*/
+	mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
+	if (mask) {
+		if (--ilr_loop > 0)
+			goto ilr_again;
+		pr_warn_ratelimited("Dino 0x%px: stuck interrupt %d\n",
+		       dino_dev->hba.base_addr, mask);
+	}
+	return IRQ_HANDLED;
+}
+
+static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
+{
+	int irq = gsc_assign_irq(&dino_interrupt_type, dino);
+	if (irq == NO_IRQ)
+		return;
+
+	*irqp = irq;
+	dino->global_irq[local_irq] = irq;
+}
+
+static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
+{
+	int irq;
+	struct dino_device *dino = ctrl;
+
+	switch (dev->id.sversion) {
+		case 0x00084:	irq =  8; break; /* PS/2 */
+		case 0x0008c:	irq = 10; break; /* RS232 */
+		case 0x00096:	irq =  8; break; /* PS/2 */
+		default:	return;		 /* Unknown */
+	}
+
+	dino_assign_irq(dino, irq, &dev->irq);
+}
+
+
+/*
+ * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de)
+ * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...)
+ */
+static void quirk_cirrus_cardbus(struct pci_dev *dev)
+{
+	u8 new_irq = dev->irq - 1;
+	printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n",
+			pci_name(dev), dev->irq, new_irq);
+	dev->irq = new_irq;
+}
+DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
+
+#ifdef CONFIG_TULIP
+/* Check if PCI device is behind a Card-mode Dino. */
+static int pci_dev_is_behind_card_dino(struct pci_dev *dev)
+{
+	struct dino_device *dino_dev;
+
+	dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge));
+	return is_card_dino(&dino_dev->hba.dev->id);
+}
+
+static void pci_fixup_tulip(struct pci_dev *dev)
+{
+	if (!pci_dev_is_behind_card_dino(dev))
+		return;
+	if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM))
+		return;
+	pr_warn("%s: HP HSC-PCI Cards with card-mode Dino not yet supported.\n",
+		pci_name(dev));
+	/* Disable this card by zeroing the PCI resources */
+	memset(&dev->resource[0], 0, sizeof(dev->resource[0]));
+	memset(&dev->resource[1], 0, sizeof(dev->resource[1]));
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_DEC, PCI_ANY_ID, pci_fixup_tulip);
+#endif /* CONFIG_TULIP */
+
+static void __init
+dino_bios_init(void)
+{
+	DBG("dino_bios_init\n");
+}
+
+/*
+ * dino_card_setup - Set up the memory space for a Dino in card mode.
+ * @bus: the bus under this dino
+ *
+ * Claim an 8MB chunk of unused IO space and call the generic PCI routines
+ * to set up the addresses of the devices on this bus.
+ */
+#define _8MB 0x00800000UL
+static void __init
+dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
+{
+	int i;
+	struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
+	struct resource *res;
+	char name[128];
+	int size;
+
+	res = &dino_dev->hba.lmmio_space;
+	res->flags = IORESOURCE_MEM;
+	size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", 
+			 dev_name(bus->bridge));
+	res->name = kmalloc(size+1, GFP_KERNEL);
+	if(res->name)
+		strcpy((char *)res->name, name);
+	else
+		res->name = dino_dev->hba.lmmio_space.name;
+	
+
+	if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
+				F_EXTEND(0xf0000000UL) | _8MB,
+				F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
+		struct pci_dev *dev, *tmp;
+
+		printk(KERN_ERR "Dino: cannot attach bus %s\n",
+		       dev_name(bus->bridge));
+		/* kill the bus, we can't do anything with it */
+		list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
+			list_del(&dev->bus_list);
+		}
+			
+		return;
+	}
+	bus->resource[1] = res;
+	bus->resource[0] = &(dino_dev->hba.io_space);
+
+	/* Now tell dino what range it has */
+	for (i = 1; i < 31; i++) {
+		if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
+			break;
+	}
+	DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
+	    i, res->start, base_addr + DINO_IO_ADDR_EN);
+	__raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
+}
+
+static void __init
+dino_card_fixup(struct pci_dev *dev)
+{
+	u32 irq_pin;
+
+	/*
+	** REVISIT: card-mode PCI-PCI expansion chassis do exist.
+	**         Not sure they were ever productized.
+	**         Die here since we'll die later in dino_inb() anyway.
+	*/
+	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+		panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
+	}
+
+	/*
+	** Set Latency Timer to 0xff (not a shared bus)
+	** Set CACHELINE_SIZE.
+	*/
+	dino_cfg_write(dev->bus, dev->devfn, 
+		       PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); 
+
+	/*
+	** Program INT_LINE for card-mode devices.
+	** The cards are hardwired according to this algorithm.
+	** And it doesn't matter if PPB's are present or not since
+	** the IRQ lines bypass the PPB.
+	**
+	** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
+	** The additional "-1" adjusts for skewing the IRQ<->slot.
+	*/
+	dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin); 
+	dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
+
+	/* Shouldn't really need to do this but it's in case someone tries
+	** to bypass PCI services and look at the card themselves.
+	*/
+	dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); 
+}
+
+/* The alignment contraints for PCI bridges under dino */
+#define DINO_BRIDGE_ALIGN 0x100000
+
+
+static void __init
+dino_fixup_bus(struct pci_bus *bus)
+{
+        struct pci_dev *dev;
+        struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
+
+	DBG(KERN_WARNING "%s(0x%px) bus %d platform_data 0x%px\n",
+	    __func__, bus, bus->busn_res.start,
+	    bus->bridge->platform_data);
+
+	/* Firmware doesn't set up card-mode dino, so we have to */
+	if (is_card_dino(&dino_dev->hba.dev->id)) {
+		dino_card_setup(bus, dino_dev->hba.base_addr);
+	} else if (bus->parent) {
+		int i;
+
+		pci_read_bridge_bases(bus);
+
+
+		for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
+			if((bus->self->resource[i].flags & 
+			    (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
+				continue;
+			
+			if(bus->self->resource[i].flags & IORESOURCE_MEM) {
+				/* There's a quirk to alignment of
+				 * bridge memory resources: the start
+				 * is the alignment and start-end is
+				 * the size.  However, firmware will
+				 * have assigned start and end, so we
+				 * need to take this into account */
+				bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
+				bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
+				
+			}
+					
+			DBG("DEBUG %s assigning %d [%pR]\n",
+			    dev_name(&bus->self->dev), i,
+			    &bus->self->resource[i]);
+			WARN_ON(pci_assign_resource(bus->self, i));
+			DBG("DEBUG %s after assign %d [%pR]\n",
+			    dev_name(&bus->self->dev), i,
+			    &bus->self->resource[i]);
+		}
+	}
+
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		if (is_card_dino(&dino_dev->hba.dev->id))
+			dino_card_fixup(dev);
+
+		/*
+		** P2PB's only have 2 BARs, no IRQs.
+		** I'd like to just ignore them for now.
+		*/
+		if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)  {
+			pcibios_init_bridge(dev);
+			continue;
+		}
+
+		/* null out the ROM resource if there is one (we don't
+		 * care about an expansion rom on parisc, since it
+		 * usually contains (x86) bios code) */
+		dev->resource[PCI_ROM_RESOURCE].flags = 0;
+				
+		if(dev->irq == 255) {
+
+#define DINO_FIX_UNASSIGNED_INTERRUPTS
+#ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
+
+			/* This code tries to assign an unassigned
+			 * interrupt.  Leave it disabled unless you
+			 * *really* know what you're doing since the
+			 * pin<->interrupt line mapping varies by bus
+			 * and machine */
+
+			u32 irq_pin;
+			
+			dino_cfg_read(dev->bus, dev->devfn, 
+				      PCI_INTERRUPT_PIN, 1, &irq_pin);
+			irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
+			printk(KERN_WARNING "Device %s has undefined IRQ, "
+					"setting to %d\n", pci_name(dev), irq_pin);
+			dino_cfg_write(dev->bus, dev->devfn, 
+				       PCI_INTERRUPT_LINE, 1, irq_pin);
+			dino_assign_irq(dino_dev, irq_pin, &dev->irq);
+#else
+			dev->irq = 65535;
+			printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
+#endif
+		} else {
+			/* Adjust INT_LINE for that busses region */
+			dino_assign_irq(dino_dev, dev->irq, &dev->irq);
+		}
+	}
+}
+
+
+static struct pci_bios_ops dino_bios_ops = {
+	.init		= dino_bios_init,
+	.fixup_bus	= dino_fixup_bus
+};
+
+
+/*
+ *	Initialise a DINO controller chip
+ */
+static void __init
+dino_card_init(struct dino_device *dino_dev)
+{
+	u32 brdg_feat = 0x00784e05;
+	unsigned long status;
+
+	status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
+	if (status & 0x0000ff80) {
+		__raw_writel(0x00000005,
+				dino_dev->hba.base_addr+DINO_IO_COMMAND);
+		udelay(1);
+	}
+
+	__raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
+	__raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
+	__raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
+
+#if 1
+/* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
+	/*
+	** PCX-L processors don't support XQL like Dino wants it.
+	** PCX-L2 ignore XQL signal and it doesn't matter.
+	*/
+	brdg_feat &= ~0x4;	/* UXQL */
+#endif
+	__raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
+
+	/*
+	** Don't enable address decoding until we know which I/O range
+	** currently is available from the host. Only affects MMIO
+	** and not I/O port space.
+	*/
+	__raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
+
+	__raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
+	__raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
+	__raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
+
+	__raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
+	__raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
+	__raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
+
+	/* Disable PAMR before writing PAPR */
+	__raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
+	__raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
+	__raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
+
+	/*
+	** Dino ERS encourages enabling FBB (0x6f).
+	** We can't until we know *all* devices below us can support it.
+	** (Something in device configuration header tells us).
+	*/
+	__raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
+
+	/* Somewhere, the PCI spec says give devices 1 second
+	** to recover from the #RESET being de-asserted.
+	** Experience shows most devices only need 10ms.
+	** This short-cut speeds up booting significantly.
+	*/
+	mdelay(pci_post_reset_delay);
+}
+
+static int __init
+dino_bridge_init(struct dino_device *dino_dev, const char *name)
+{
+	unsigned long io_addr;
+	int result, i, count=0;
+	struct resource *res, *prevres = NULL;
+	/*
+	 * Decoding IO_ADDR_EN only works for Built-in Dino
+	 * since PDC has already initialized this.
+	 */
+
+	io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
+	if (io_addr == 0) {
+		printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
+		return -ENODEV;
+	}
+
+	res = &dino_dev->hba.lmmio_space;
+	for (i = 0; i < 32; i++) {
+		unsigned long start, end;
+
+		if((io_addr & (1 << i)) == 0)
+			continue;
+
+		start = F_EXTEND(0xf0000000UL) | (i << 23);
+		end = start + 8 * 1024 * 1024 - 1;
+
+		DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
+		    start, end);
+
+		if(prevres && prevres->end + 1 == start) {
+			prevres->end = end;
+		} else {
+			if(count >= DINO_MAX_LMMIO_RESOURCES) {
+				printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
+				break;
+			}
+			prevres = res;
+			res->start = start;
+			res->end = end;
+			res->flags = IORESOURCE_MEM;
+			res->name = kmalloc(64, GFP_KERNEL);
+			if(res->name)
+				snprintf((char *)res->name, 64, "%s LMMIO %d",
+					 name, count);
+			res++;
+			count++;
+		}
+	}
+
+	res = &dino_dev->hba.lmmio_space;
+
+	for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
+		if(res[i].flags == 0)
+			break;
+
+		result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
+		if (result < 0) {
+			printk(KERN_ERR "%s: failed to claim PCI Bus address "
+			       "space %d (%pR)!\n", name, i, &res[i]);
+			return result;
+		}
+	}
+	return 0;
+}
+
+static int __init dino_common_init(struct parisc_device *dev,
+		struct dino_device *dino_dev, const char *name)
+{
+	int status;
+	u32 eim;
+	struct resource *res;
+
+	pcibios_register_hba(&dino_dev->hba);
+
+	pci_bios = &dino_bios_ops;   /* used by pci_scan_bus() */
+	pci_port = &dino_port_ops;
+
+	/*
+	** Note: SMP systems can make use of IRR1/IAR1 registers
+	**   But it won't buy much performance except in very
+	**   specific applications/configurations. Note Dino
+	**   still only has 11 IRQ input lines - just map some of them
+	**   to a different processor.
+	*/
+	dev->irq = gsc_alloc_irq(&dino_dev->gsc_irq);
+	eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data;
+
+	/* 
+	** Dino needs a PA "IRQ" to get a processor's attention.
+	** arch/parisc/kernel/irq.c returns an EIRR bit.
+	*/
+	if (dev->irq < 0) {
+		printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
+		return 1;
+	}
+
+	status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
+	if (status) {
+		printk(KERN_WARNING "%s: request_irq() failed with %d\n", 
+			name, status);
+		return 1;
+	}
+
+	/* Support the serial port which is sometimes attached on built-in
+	 * Dino / Cujo chips.
+	 */
+
+	gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
+
+	/*
+	** This enables DINO to generate interrupts when it sees
+	** any of its inputs *change*. Just asserting an IRQ
+	** before it's enabled (ie unmasked) isn't good enough.
+	*/
+	__raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
+
+	/*
+	** Some platforms don't clear Dino's IRR0 register at boot time.
+	** Reading will clear it now.
+	*/
+	__raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
+
+	/* allocate I/O Port resource region */
+	res = &dino_dev->hba.io_space;
+	if (!is_cujo(&dev->id)) {
+		res->name = "Dino I/O Port";
+	} else {
+		res->name = "Cujo I/O Port";
+	}
+	res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
+	res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
+	res->flags = IORESOURCE_IO; /* do not mark it busy ! */
+	if (request_resource(&ioport_resource, res) < 0) {
+		printk(KERN_ERR "%s: request I/O Port region failed "
+		       "0x%lx/%lx (hpa 0x%px)\n",
+		       name, (unsigned long)res->start, (unsigned long)res->end,
+		       dino_dev->hba.base_addr);
+		return 1;
+	}
+
+	return 0;
+}
+
+#define CUJO_RAVEN_ADDR		F_EXTEND(0xf1000000UL)
+#define CUJO_FIREHAWK_ADDR	F_EXTEND(0xf1604000UL)
+#define CUJO_RAVEN_BADPAGE	0x01003000UL
+#define CUJO_FIREHAWK_BADPAGE	0x01607000UL
+
+static const char dino_vers[][4] = {
+	"2.0",
+	"2.1",
+	"3.0",
+	"3.1"
+};
+
+static const char cujo_vers[][4] = {
+	"1.0",
+	"2.0"
+};
+
+void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
+
+/*
+** Determine if dino should claim this chip (return 0) or not (return 1).
+** If so, initialize the chip appropriately (card-mode vs bridge mode).
+** Much of the initialization is common though.
+*/
+static int __init dino_probe(struct parisc_device *dev)
+{
+	struct dino_device *dino_dev;	// Dino specific control struct
+	const char *version = "unknown";
+	char *name;
+	int is_cujo = 0;
+	LIST_HEAD(resources);
+	struct pci_bus *bus;
+	unsigned long hpa = dev->hpa.start;
+	int max;
+
+	name = "Dino";
+	if (is_card_dino(&dev->id)) {
+		version = "3.x (card mode)";
+	} else {
+		if (!is_cujo(&dev->id)) {
+			if (dev->id.hversion_rev < 4) {
+				version = dino_vers[dev->id.hversion_rev];
+			}
+		} else {
+			name = "Cujo";
+			is_cujo = 1;
+			if (dev->id.hversion_rev < 2) {
+				version = cujo_vers[dev->id.hversion_rev];
+			}
+		}
+	}
+
+	printk("%s version %s found at 0x%lx\n", name, version, hpa);
+
+	if (!request_mem_region(hpa, PAGE_SIZE, name)) {
+		printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n",
+			hpa);
+		return 1;
+	}
+
+	/* Check for bugs */
+	if (is_cujo && dev->id.hversion_rev == 1) {
+#ifdef CONFIG_IOMMU_CCIO
+		printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
+		if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
+			ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
+		} else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
+			ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
+		} else {
+			printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
+		}
+#endif
+	} else if (!is_cujo && !is_card_dino(&dev->id) &&
+			dev->id.hversion_rev < 3) {
+		printk(KERN_WARNING
+"The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
+"data corruption.  See Service Note Numbers: A4190A-01, A4191A-01.\n"
+"Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
+"Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
+			dev->id.hversion_rev);
+/* REVISIT: why are C200/C240 listed in the README table but not
+**   "Models affected"? Could be an omission in the original literature.
+*/
+	}
+
+	dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL);
+	if (!dino_dev) {
+		printk("dino_init_chip - couldn't alloc dino_device\n");
+		return 1;
+	}
+
+	dino_dev->hba.dev = dev;
+	dino_dev->hba.base_addr = ioremap(hpa, 4096);
+	dino_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
+	spin_lock_init(&dino_dev->dinosaur_pen);
+	dino_dev->hba.iommu = ccio_get_iommu(dev);
+
+	if (is_card_dino(&dev->id)) {
+		dino_card_init(dino_dev);
+	} else {
+		dino_bridge_init(dino_dev, name);
+	}
+
+	if (dino_common_init(dev, dino_dev, name))
+		return 1;
+
+	dev->dev.platform_data = dino_dev;
+
+	pci_add_resource_offset(&resources, &dino_dev->hba.io_space,
+				HBA_PORT_BASE(dino_dev->hba.hba_num));
+	if (dino_dev->hba.lmmio_space.flags)
+		pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space,
+					dino_dev->hba.lmmio_space_offset);
+	if (dino_dev->hba.elmmio_space.flags)
+		pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space,
+					dino_dev->hba.lmmio_space_offset);
+	if (dino_dev->hba.gmmio_space.flags)
+		pci_add_resource(&resources, &dino_dev->hba.gmmio_space);
+
+	dino_dev->hba.bus_num.start = dino_current_bus;
+	dino_dev->hba.bus_num.end = 255;
+	dino_dev->hba.bus_num.flags = IORESOURCE_BUS;
+	pci_add_resource(&resources, &dino_dev->hba.bus_num);
+	/*
+	** It's not used to avoid chicken/egg problems
+	** with configuration accessor functions.
+	*/
+	dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
+			 dino_current_bus, &dino_cfg_ops, NULL, &resources);
+	if (!bus) {
+		printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
+		       dev_name(&dev->dev), dino_current_bus);
+		pci_free_resource_list(&resources);
+		/* increment the bus number in case of duplicates */
+		dino_current_bus++;
+		return 0;
+	}
+
+	max = pci_scan_child_bus(bus);
+	pci_bus_update_busn_res_end(bus, max);
+
+	/* This code *depends* on scanning being single threaded
+	 * if it isn't, this global bus number count will fail
+	 */
+	dino_current_bus = max + 1;
+	pci_bus_assign_resources(bus);
+	pci_bus_add_devices(bus);
+	return 0;
+}
+
+/*
+ * Normally, we would just test sversion.  But the Elroy PCI adapter has
+ * the same sversion as Dino, so we have to check hversion as well.
+ * Unfortunately, the J2240 PDC reports the wrong hversion for the first
+ * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
+ * For card-mode Dino, most machines report an sversion of 9D.  But 715
+ * and 725 firmware misreport it as 0x08080 for no adequately explained
+ * reason.
+ */
+static const struct parisc_device_id dino_tbl[] __initconst = {
+	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
+	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
+	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
+	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
+	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
+	{ 0, }
+};
+
+static struct parisc_driver dino_driver __refdata = {
+	.name =		"dino",
+	.id_table =	dino_tbl,
+	.probe =	dino_probe,
+};
+
+/*
+ * One time initialization to let the world know Dino is here.
+ * This is the only routine which is NOT static.
+ * Must be called exactly once before pci_init().
+ */
+int __init dino_init(void)
+{
+	register_parisc_driver(&dino_driver);
+	return 0;
+}
+