patch-2.4.20 linux-2.4.20/drivers/gsc/dino.c

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diff -urN linux-2.4.19/drivers/gsc/dino.c linux-2.4.20/drivers/gsc/dino.c
@@ -0,0 +1,931 @@
+/*
+**	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
+**
+**	This program is free software; you can redistribute it and/or modify
+**	it under the terms of the GNU General Public License as published by
+**      the Free Software Foundation; either version 2 of the License, or
+**      (at your option) any later version.
+**
+**	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/config.h>
+#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/system.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+
+#include <asm/irq.h>		/* for "gsc" irq functions */
+#include <asm/gsc.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 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_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;
+	unsigned long		txn_addr; /* EIR addr to generate interrupt */ 
+	u32			txn_data; /* EIR data assign to each dino */ 
+	int			irq;      /* Virtual IRQ dino uses */
+	struct irq_region	*dino_region;  /* region for this Dino */
+
+	u32 			imr; /* IRQ's which are enabled */ 
+#ifdef DINO_DEBUG
+	unsigned int		dino_irr0; /* save most recent IRQ line stat */ 
+#endif
+};
+
+/* Looks nice and keeps the compiler happy */
+#define DINO_DEV(d) ((struct dino_device *) d)
+
+
+
+/***********************************************
+**
+** Dino Configuration Space Accessor Functions
+**
+************************************************/
+
+#define le8_to_cpu(x)	(x)
+#define cpu_to_le8(x)	(x)
+
+#define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
+
+#define DINO_CFG_RD(type, size, mask) \
+static int dino_cfg_read##size (struct pci_dev *dev, int pos, u##size *data) \
+{ \
+	struct dino_device *d = DINO_DEV(dev->sysdata); \
+	u32 local_bus = (dev->bus->parent == NULL) ? 0 : dev->bus->secondary; \
+	u32 v = DINO_CFG_TOK(local_bus, dev->devfn, (pos&~3)); \
+	unsigned long flags; \
+	spin_lock_irqsave(&d->dinosaur_pen, flags); \
+	/* tell HW which CFG address */ \
+	gsc_writel(v, d->hba.base_addr + DINO_PCI_ADDR); \
+	/* generate cfg read cycle */ \
+	*data = le##size##_to_cpu(gsc_read##type(d->hba.base_addr+DINO_CONFIG_DATA+(pos&mask))); \
+	spin_unlock_irqrestore(&d->dinosaur_pen, flags); \
+	return 0; \
+}
+
+DINO_CFG_RD(b,  8, 3)
+DINO_CFG_RD(w, 16, 2)
+DINO_CFG_RD(l, 32, 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.
+*/
+#define DINO_CFG_WR(type, size, mask) \
+static int dino_cfg_write##size (struct pci_dev *dev, int pos, u##size data) \
+{ \
+	struct dino_device *d = DINO_DEV(dev->sysdata);	\
+	u32 local_bus = (dev->bus->parent == NULL) ? 0 : dev->bus->secondary; \
+	u32 v = DINO_CFG_TOK(local_bus, dev->devfn, (pos&~3)); \
+	unsigned long flags; \
+	spin_lock_irqsave(&d->dinosaur_pen, flags); \
+	/* avoid address stepping feature */ \
+	gsc_writel(v & 0xffffff00, d->hba.base_addr + DINO_PCI_ADDR); \
+	(volatile int) gsc_readl(d->hba.base_addr + DINO_CONFIG_DATA); \
+	/* tell HW which CFG address */ \
+	gsc_writel(v, d->hba.base_addr + DINO_PCI_ADDR); \
+	/* generate cfg read cycle */ \
+	gsc_write##type(cpu_to_le##size(data), d->hba.base_addr+DINO_CONFIG_DATA+(pos&mask)); \
+	spin_unlock_irqrestore(&d->dinosaur_pen, flags); \
+	return 0; \
+}
+
+DINO_CFG_WR(b,  8, 3)
+DINO_CFG_WR(w, 16, 2)
+DINO_CFG_WR(l, 32, 0)
+
+static struct pci_ops dino_cfg_ops = {
+	read_byte:	dino_cfg_read8,
+	read_word:	dino_cfg_read16,
+	read_dword:	dino_cfg_read32,
+	write_byte:	dino_cfg_write8,
+	write_word:	dino_cfg_write16,
+	write_dword:	dino_cfg_write32
+};
+
+
+
+/*******************************************************
+**
+** 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 */ \
+	gsc_writel((u32) addr & ~3, d->base_addr + DINO_PCI_ADDR); \
+	/* generate I/O PORT read cycle */ \
+	v = gsc_read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
+	spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
+	return le##size##_to_cpu(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 CFG address */ \
+	gsc_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
+	/* generate cfg write cycle */ \
+	gsc_write##type(cpu_to_le##size(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)
+
+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(void *irq_dev, int irq)
+{
+	struct dino_device *dino_dev = DINO_DEV(irq_dev);
+
+	DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, irq_dev, irq);
+
+	if (NULL == irq_dev || irq > DINO_IRQS || irq < 0) {
+		printk(KERN_WARNING "%s(0x%lx, %d) - not a dino irq?\n",
+			__FUNCTION__, (long) irq_dev, irq);
+		BUG();
+	} else {
+		/*
+		** Clear the matching bit in the IMR register
+		*/
+		dino_dev->imr &= ~(DINO_MASK_IRQ(irq));
+		gsc_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
+	}
+}
+
+
+static void
+dino_unmask_irq(void *irq_dev, int irq)
+{
+	struct dino_device *dino_dev = DINO_DEV(irq_dev);
+	u32 tmp;
+
+	DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, irq_dev, irq);
+
+	if (NULL == irq_dev || irq > DINO_IRQS) {
+		printk(KERN_WARNING "%s(): %d not a dino irq?\n",
+				__FUNCTION__, irq);
+		BUG();
+		return;
+	}
+
+	/* set the matching bit in the IMR register */
+	dino_dev->imr |= DINO_MASK_IRQ(irq);          /* used in dino_isr() */
+	gsc_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 = gsc_readl(dino_dev->hba.base_addr+DINO_ILR);
+	if (tmp & DINO_MASK_IRQ(irq)) {
+		DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
+				__FUNCTION__, tmp);
+		gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
+	}
+}
+
+
+
+static void
+dino_enable_irq(void *irq_dev, int irq)
+{
+	struct dino_device *dino_dev = DINO_DEV(irq_dev);
+
+	/*
+	** clear pending IRQ bits
+	**
+	** This does NOT change ILR state!
+	** See comments in dino_unmask_irq() for ILR usage.
+	*/
+	gsc_readl(dino_dev->hba.base_addr+DINO_IPR);
+
+	dino_unmask_irq(irq_dev, irq);
+}
+
+
+static struct irq_region_ops dino_irq_ops = {
+	disable_irq:	dino_mask_irq,	/* ??? */
+	enable_irq:	dino_enable_irq, 
+	mask_irq:	dino_mask_irq,
+	unmask_irq:	dino_unmask_irq
+};
+
+
+/*
+ * 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 void
+dino_isr(int irq, void *intr_dev, struct pt_regs *regs)
+{
+	struct dino_device *dino_dev = DINO_DEV(intr_dev);
+	u32 mask;
+	int ilr_loop = 100;
+	extern void do_irq(struct irqaction *a, int i, struct pt_regs *p);
+
+
+	/* read and acknowledge pending interrupts */
+#ifdef DINO_DEBUG
+	dino_dev->dino_irr0 =
+#endif
+	mask = gsc_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
+
+ilr_again:
+	while (mask)
+	{
+		int irq;
+
+		/*
+		 * Perform a binary search on set bits.
+		 * `Less than Fatal' and PS2 interupts aren't supported.
+		 */
+		if (mask & 0xf) {
+			if (mask & 0x3) {
+				irq = (mask & 0x1) ? 0 : 1; /* PCI INT A, B */
+			} else {
+				irq = (mask & 0x4) ? 2 : 3; /* PCI INT C, D */
+			}
+		} else {
+			if (mask & 0x30) {
+				irq = (mask & 0x10) ? 4 : 5; /* PCI INT E, F */
+			} else {
+				irq = (mask & 0x40) ? 6 : 10; /* GSC, RS232 */
+			}
+		}
+
+		mask &= ~(1<<irq);
+
+		DBG(KERN_WARNING "%s(%x, %p) mask %0x\n",
+			__FUNCTION__, irq, intr_dev, mask);
+		do_irq(&dino_dev->dino_region->action[irq],
+			dino_dev->dino_region->data.irqbase + irq,
+			regs);
+
+	}
+
+	/* 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 = gsc_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
+	if (mask) {
+		if (--ilr_loop > 0)
+			goto ilr_again;
+		printk("Dino %lx: stuck interrupt %d\n", dino_dev->hba.base_addr, mask);
+	}
+}
+
+static int dino_choose_irq(struct parisc_device *dev)
+{
+	int irq = -1;
+
+	switch (dev->id.sversion) {
+		case 0x00084:	irq =  8; break; /* PS/2 */
+		case 0x0008c:	irq = 10; break; /* RS232 */
+		case 0x00096:	irq =  8; break; /* PS/2 */
+	}
+
+	return irq;
+}
+
+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, unsigned long base_addr)
+{
+	int i;
+	struct dino_device *dino_dev = DINO_DEV(bus->sysdata);
+	struct resource *res;
+
+	res = &dino_dev->hba.lmmio_space;
+	res->flags = IORESOURCE_MEM;
+
+	if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
+				(unsigned long) 0xfffffffff0000000UL | _8MB,
+				0xffffffffffffffffUL &~ _8MB, _8MB,
+				NULL, NULL) < 0) {
+		printk(KERN_WARNING "Dino: Failed to allocate memory region\n");
+		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 == (0xfffffffff0000000UL | i * _8MB))
+			break;
+	}
+	gsc_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
+
+	pcibios_assign_unassigned_resources(bus);
+}
+
+static void __init
+dino_card_fixup(struct pci_dev *dev)
+{
+	u8 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_write16(dev, PCI_CACHE_LINE_SIZE, 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_read8(dev, PCI_INTERRUPT_PIN, &irq_pin); 
+	dev->irq = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
+
+	/* 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_write8(dev, PCI_INTERRUPT_LINE, dev->irq); 
+}
+
+
+static void __init
+dino_fixup_bus(struct pci_bus *bus)
+{
+	struct list_head *ln;
+        struct pci_dev *dev;
+        struct dino_device *dino_dev = DINO_DEV(bus->sysdata);
+	int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num);
+
+	DBG(KERN_WARNING "%s(0x%p) bus %d sysdata 0x%p\n",
+			__FUNCTION__, bus, bus->secondary, bus->sysdata);
+
+	/* 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);
+
+	/* If this is a PCI-PCI Bridge, read the window registers etc */
+	if (bus->self)
+		pci_read_bridge_bases(bus);
+
+	list_for_each(ln, &bus->devices) {
+		int i;
+
+		dev = pci_dev_b(ln);
+		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)
+			continue;
+
+		/* Adjust the I/O Port space addresses */
+		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+			struct resource *res = &dev->resource[i];
+			if (res->flags & IORESOURCE_IO) {
+				res->start |= port_base;
+				res->end |= port_base;
+			}
+#ifdef __LP64__
+			/* Sign Extend MMIO addresses */
+			else if (res->flags & IORESOURCE_MEM) {
+				res->start |= 0xffffffff00000000UL;
+				res->end   |= 0xffffffff00000000UL;
+			}
+#endif
+		}
+
+		/* Adjust INT_LINE for that busses region */
+		dev->irq = dino_dev->dino_region->data.irqbase + dev->irq;
+	}
+}
+
+
+struct pci_bios_ops dino_bios_ops = {
+	dino_bios_init,
+	dino_fixup_bus	/* void dino_fixup_bus(struct pci_bus *bus) */
+};
+
+
+/*
+ *	Initialise a DINO controller chip
+ */
+static void __init
+dino_card_init(struct dino_device *dino_dev)
+{
+	u32 brdg_feat = 0x00784e05;
+
+	gsc_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
+	gsc_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
+	gsc_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
+	gsc_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.
+	*/
+	gsc_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
+
+	gsc_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
+	gsc_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
+	gsc_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
+
+	gsc_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
+	gsc_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
+	gsc_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
+
+	/* Disable PAMR before writing PAPR */
+	gsc_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
+	gsc_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
+	gsc_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).
+	*/
+	gsc_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, bpos;
+	int result;
+	struct resource *res;
+	/*
+	 * Decoding IO_ADDR_EN only works for Built-in Dino
+	 * since PDC has already initialized this.
+	 */
+
+	io_addr = gsc_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;
+	}
+
+	for (bpos = 0; (io_addr & (1 << bpos)) == 0; bpos++)
+		;
+
+	res = &dino_dev->hba.lmmio_space;
+	res->flags = IORESOURCE_MEM;
+
+	res->start = (unsigned long)(signed int)(0xf0000000 | (bpos << 23));
+	res->end = res->start + 8 * 1024 * 1024 - 1;
+
+	result = ccio_request_resource(dino_dev->hba.dev, res);
+	if (result < 0) {
+		printk(KERN_ERR "%s: failed to claim PCI Bus address space!\n", name);
+		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 gsc_irq gsc_irq;
+	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.
+	*/
+	dino_dev->irq = gsc_alloc_irq(&gsc_irq);
+	dino_dev->txn_addr = gsc_irq.txn_addr;
+	dino_dev->txn_data = gsc_irq.txn_data;
+	eim = ((u32) gsc_irq.txn_addr) | 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 (dino_dev->irq < 0) {
+		printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
+		return 1;
+	}
+
+	status = request_irq(dino_dev->irq, dino_isr, 0, name, dino_dev);
+	if (status) {
+		printk(KERN_WARNING "%s: request_irq() failed with %d\n", 
+			name, status);
+		return 1;
+	}
+
+	/*
+	** Tell generic interrupt support we have 11 bits which need
+	** be checked in the interrupt handler.
+	*/
+	dino_dev->dino_region = alloc_irq_region(DINO_IRQS, &dino_irq_ops,
+						name, dino_dev);
+
+	if (NULL == dino_dev->dino_region) {
+		printk(KERN_WARNING "%s: alloc_irq_region() failed\n", name);
+		return 1;
+	}
+
+	/* Support the serial port which is sometimes attached on built-in
+	 * Dino / Cujo chips.
+	 */
+
+	fixup_child_irqs(dev, dino_dev->dino_region->data.irqbase,
+			dino_choose_irq);
+
+	/*
+	** This enables DINO to generate interrupts when it sees
+	** any of it's inputs *change*. Just asserting an IRQ
+	** before it's enabled (ie unmasked) isn't good enough.
+	*/
+	gsc_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.
+	*/
+	gsc_readl(dino_dev->hba.base_addr+DINO_IRR0);
+
+	/* allocate I/O Port resource region */
+	res = &dino_dev->hba.io_space;
+	if (dev->id.hversion == 0x680 || is_card_dino(&dev->id)) {
+		res->name = "Dino I/O Port";
+	        dino_dev->hba.lmmio_space.name = "Dino LMMIO";
+	} else {
+		res->name = "Cujo I/O Port";
+	        dino_dev->hba.lmmio_space.name = "Cujo LMMIO";
+	}
+	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%lx)\n",
+				name, res->start, res->end, dino_dev->hba.base_addr);
+		return 1;
+	}
+
+	return 0;
+}
+
+#define CUJO_RAVEN_ADDR		0xfffffffff1000000UL
+#define CUJO_FIREHAWK_ADDR	0xfffffffff1604000UL
+#define CUJO_RAVEN_BADPAGE	0x01003000UL
+#define CUJO_FIREHAWK_BADPAGE	0x01607000UL
+
+static const char *dino_vers[] = {
+	"2.0",
+	"2.1",
+	"3.0",
+	"3.1"
+};
+
+static const char *cujo_vers[] = {
+	"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_driver_callback(struct parisc_device *dev)
+{
+	struct dino_device *dino_dev;	// Dino specific control struct
+	const char *version = "unknown";
+	const char *name = "Dino";
+	int is_cujo = 0;
+
+	if (is_card_dino(&dev->id)) {
+		version = "3.x (card mode)";
+	} else {
+		if(dev->id.hversion == 0x680) {
+			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, dev->hpa);
+
+	if (!request_mem_region(dev->hpa, PAGE_SIZE, name)) {
+		printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n",
+			dev->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 (dev->hpa == CUJO_RAVEN_ADDR) {
+			ccio_cujo20_fixup(dev->parent, CUJO_RAVEN_BADPAGE);
+		} else if (dev->hpa == CUJO_FIREHAWK_ADDR) {
+			ccio_cujo20_fixup(dev->parent, CUJO_FIREHAWK_BADPAGE);
+		} else {
+			printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", dev->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 = kmalloc(sizeof(struct dino_device), GFP_KERNEL);
+	if (!dino_dev) {
+		printk("dino_init_chip - couldn't alloc dino_device\n");
+		return 1;
+	}
+
+	memset(dino_dev, 0, sizeof(struct dino_device));
+
+	dino_dev->hba.dev = dev;
+	dino_dev->hba.base_addr = dev->hpa;  /* faster access */
+	dino_dev->hba.lmmio_space_offset = 0;	/* CPU addrs == bus addrs */
+	dino_dev->dinosaur_pen = SPIN_LOCK_UNLOCKED;
+	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;
+
+	/*
+	** It's not used to avoid chicken/egg problems
+	** with configuration accessor functions.
+	*/
+	dino_dev->hba.hba_bus = pci_scan_bus(dino_dev->hba.hba_num,
+			&dino_cfg_ops, dino_dev);
+
+	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.
+ */
+static struct parisc_device_id dino_tbl[] = {
+	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D }, /* Card-mode Dino. */
+	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x444, 0x08080 }, /* Same card in a 715.  Bug? */
+	{ 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 = {
+	name:		"Dino",
+	id_table:	dino_tbl,
+	probe:		dino_driver_callback,
+};
+
+/*
+ * 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;
+}
+

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)