// 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 == 0 x682)
#define DINO_IAR0 0 x004
#define DINO_IODC_ADDR 0 x008
#define DINO_IODC_DATA_0 0 x008
#define DINO_IODC_DATA_1 0 x008
#define DINO_IRR0 0 x00C
#define DINO_IAR1 0 x010
#define DINO_IRR1 0 x014
#define DINO_IMR 0 x018
#define DINO_IPR 0 x01C
#define DINO_TOC_ADDR 0 x020
#define DINO_ICR 0 x024
#define DINO_ILR 0 x028
#define DINO_IO_COMMAND 0 x030
#define DINO_IO_STATUS 0 x034
#define DINO_IO_CONTROL 0 x038
#define DINO_IO_GSC_ERR_RESP 0 x040
#define DINO_IO_ERR_INFO 0 x044
#define DINO_IO_PCI_ERR_RESP 0 x048
#define DINO_IO_FBB_EN 0 x05c
#define DINO_IO_ADDR_EN 0 x060
#define DINO_PCI_ADDR 0 x064
#define DINO_CONFIG_DATA 0 x068
#define DINO_IO_DATA 0 x06c
#define DINO_MEM_DATA 0 x070 /* Dino 3.x only */
#define DINO_GSC2X_CONFIG 0 x7b4
#define DINO_GMASK 0 x800
#define DINO_PAMR 0 x804
#define DINO_PAPR 0 x808
#define DINO_DAMODE 0 x80c
#define DINO_PCICMD 0 x810
#define DINO_PCISTS 0 x814
#define DINO_MLTIM 0 x81c
#define DINO_BRDG_FEAT 0 x820
#define DINO_PCIROR 0 x824
#define DINO_PCIWOR 0 x828
#define DINO_TLTIM 0 x830
#define DINO_IRQS 11 /* bits 0-10 are architected */
#define DINO_IRR_MASK 0 x5ff /* only 10 bits are implemented */
#define DINO_LOCAL_IRQS (DINO_IRQS+1 )
#define DINO_MASK_IRQ(x) (1 <<(x))
#define PCIINTA 0 x001
#define PCIINTB 0 x002
#define PCIINTC 0 x004
#define PCIINTD 0 x008
#define PCIINTE 0 x010
#define PCIINTF 0 x020
#define GSCEXTINT 0 x040
/* #define xxx 0x080 - bit 7 is "default" */
/* #define xxx 0x100 - bit 8 not used */
/* #define xxx 0x200 - bit 9 not used */
#define RS232INT 0 x400
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 & 0 xffffff00, 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 0 x00084: irq = 8 ; break ; /* PS/2 */
case 0 x0008c: irq = 10 ; break ; /* RS232 */
case 0 x00096: 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 8 MB chunk of unused IO space and call the generic PCI routines
* to set up the addresses of the devices on this bus .
*/
#define _8 MB 0 x00800000UL
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, _8 MB,
F_EXTEND(0 xf0000000UL) | _8 MB,
F_EXTEND(0 xffffffffUL) &~ _8 MB, _8 MB) < 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(0 xf0000000UL | (i * _8 MB)))
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 0 xff ( not a shared bus )
* * Set CACHELINE_SIZE .
*/
dino_cfg_write(dev->bus, dev->devfn,
PCI_CACHE_LINE_SIZE, 2 , 0 xff00 | 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 0 x100000
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 = 0 x00784e05;
unsigned long status;
status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
if (status & 0 x0000ff80) {
__raw_writel(0 x00000005,
dino_dev->hba.base_addr+DINO_IO_COMMAND);
udelay(1 );
}
__raw_writel(0 x00000000, dino_dev->hba.base_addr+DINO_GMASK);
__raw_writel(0 x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
__raw_writel(0 x00000000, 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 &= ~0 x4; /* 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(0 x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
__raw_writel(0 x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
__raw_writel(0 x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
__raw_writel(0 x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
__raw_writel(0 x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
__raw_writel(0 x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
__raw_writel(0 x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
/* Disable PAMR before writing PAPR */
__raw_writel(0 x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
__raw_writel(0 x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
__raw_writel(0 x00000000, dino_dev->hba.base_addr+DINO_PAMR);
/*
* * Dino ERS encourages enabling FBB ( 0 x6f ) .
* * We can ' t until we know * all * devices below us can support it .
* * ( Something in device configuration header tells us ) .
*/
__raw_writel(0 x0000004f, 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 10 ms .
* * 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(0 xf0000000UL) | (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(0 xf1000000UL)
#define CUJO_FIREHAWK_ADDR F_EXTEND(0 xf1604000UL)
#define CUJO_RAVEN_BADPAGE 0 x01003000UL
#define CUJO_FIREHAWK_BADPAGE 0 x01607000UL
static const char dino_vers[][4 ] = {
"2.0" ,
"2.1" ,
"3.0" ,
"3.1"
};
static const char cujo_vers[][4 ] = {
"1.0" ,
"2.0"
};
/*
* * 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 9 D . But 715
* and 725 firmware misreport it as 0 x08080 for no adequately explained
* reason .
*/
static const struct parisc_device_id dino_tbl[] __initconst = {
{ HPHW_A_DMA, HVERSION_REV_ANY_ID, 0 x004, 0 x0009D },/* Card-mode Dino */
{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0 x08080 }, /* XXX */
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0 x680, 0 xa }, /* Bridge-mode Dino */
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0 x682, 0 xa }, /* Bridge-mode Cujo */
{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0 x05d, 0 xa }, /* 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 ( ) .
*/
static int __init dino_init(void )
{
return register_parisc_driver(&dino_driver);
}
arch_initcall(dino_init);
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