WSL2-Linux-Kernel/drivers/parisc/dino.c

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C
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/*
** 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 Helge Deller
**
** 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/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 "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 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;
unsigned long txn_addr; /* EIR addr to generate interrupt */
u32 txn_data; /* EIR data assign to each dino */
u32 imr; /* IRQ's which are enabled */
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
};
/* Looks nice and keeps the compiler happy */
#define DINO_DEV(d) ((struct dino_device *) d)
/*
* 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->secondary;
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", __FUNCTION__, 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->secondary;
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", __FUNCTION__, 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)
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_disable_irq(unsigned int irq)
{
[PATCH] genirq: rename desc->handler to desc->chip This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29 13:24:36 +04:00
struct dino_device *dino_dev = irq_desc[irq].chip_data;
int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, 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_enable_irq(unsigned int irq)
{
[PATCH] genirq: rename desc->handler to desc->chip This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29 13:24:36 +04:00
struct dino_device *dino_dev = irq_desc[irq].chip_data;
int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
u32 tmp;
DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, 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",
__FUNCTION__, tmp);
gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
}
}
static unsigned int dino_startup_irq(unsigned int irq)
{
dino_enable_irq(irq);
return 0;
}
static struct hw_interrupt_type dino_interrupt_type = {
.typename = "GSC-PCI",
.startup = dino_startup_irq,
.shutdown = dino_disable_irq,
.enable = dino_enable_irq,
.disable = dino_disable_irq,
.ack = no_ack_irq,
.end = no_end_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.
*/
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 17:55:46 +04:00
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",
__FUNCTION__, irq, intr_dev, mask);
__do_IRQ(irq);
mask &= ~(1 << 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;
printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n",
dino_dev->hba.base_addr, mask);
return IRQ_NONE;
}
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 __devinit 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 );
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)",
bus->bridge->bus_id);
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 list_head *ln, *tmp_ln;
printk(KERN_ERR "Dino: cannot attach bus %s\n",
bus->bridge->bus_id);
/* kill the bus, we can't do anything with it */
list_for_each_safe(ln, tmp_ln, &bus->devices) {
struct pci_dev *dev = pci_dev_b(ln);
list_del(&dev->global_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 = (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_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 list_head *ln;
struct pci_dev *dev;
struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num);
DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n",
__FUNCTION__, bus, bus->secondary,
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 == NULL) {
/* must have a dino above it, reparent the resources
* into the dino window */
int i;
struct resource *res = &dino_dev->hba.lmmio_space;
bus->resource[0] = &(dino_dev->hba.io_space);
for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
if(res[i].flags == 0)
break;
bus->resource[i+1] = &res[i];
}
} else if(bus->self) {
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 [0x%lx,0x%lx]\n",
bus->self->dev.bus_id, i,
bus->self->resource[i].start,
bus->self->resource[i].end);
pci_assign_resource(bus->self, i);
DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n",
bus->self->dev.bus_id, i,
bus->self->resource[i].start,
bus->self->resource[i].end);
}
}
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 |= F_EXTEND(0UL);
res->end |= F_EXTEND(0UL);
}
#endif
}
/* 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 = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
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);
}
}
}
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 (0x%lx-0x%lx)!\n", name, i, res[i].start, res[i].end);
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.
*/
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 (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%p)\n",
name, res->start, 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[] = {
"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_probe(struct parisc_device *dev)
{
struct dino_device *dino_dev; // Dino specific control struct
const char *version = "unknown";
char *name;
int is_cujo = 0;
struct pci_bus *bus;
unsigned long hpa = dev->hpa.start;
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%ld)!\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_nocache(hpa, 4096);
dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */
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;
/*
** It's not used to avoid chicken/egg problems
** with configuration accessor functions.
*/
bus = pci_scan_bus_parented(&dev->dev, dino_current_bus,
&dino_cfg_ops, NULL);
if(bus) {
pci_bus_add_devices(bus);
/* This code *depends* on scanning being single threaded
* if it isn't, this global bus number count will fail
*/
dino_current_bus = bus->subordinate + 1;
pci_bus_assign_resources(bus);
} else {
printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus);
/* increment the bus number in case of duplicates */
dino_current_bus++;
}
dino_dev->hba.hba_bus = 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 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, 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 = {
.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;
}