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Subject[RFC: 2.6 patch] m68knommu: remove the broken COMEMPCI code
On Mon, Aug 25, 2008 at 04:16:12PM +1000, Greg Ungerer wrote:
>
> Hi Adrian,
>
> Adrian Bunk wrote:
>> There exists blackfin hardware with PCI support, but the support
>> currently in the kernel fails to build starting with:
>>
>> <-- snip -->
>>
>> ...
>> CC init/main.o
>> In file included from dma-mapping.h:5,
>> from dma-mapping.h:52,
>> from dmaengine.h:29,
>> from skbuff.h:29,
>> from netlink.h:155,
>> from genetlink.h:4,
>> from genetlink.h:4,
>> from taskstats_kern.h:12,
>> from main.c:46:
>> dma-mapping.h: In function 'dma_supported': ma-mapping.h:24: error:
>> implicit declaration of function 'pci_dma_supported'
>> ...
>> make[2]: *** [init/main.o] Error 1
>
> I think we should just remove the underlying comempci access
> code which is the only user of this (arch/m68knommu/kernel/comempci.c).
> Nobody has used it in a very long time. And the hardware itself is
> old, and completely brain-damaged by design.

A patch for removing the comempci code is below.

It's a bit suspicious that asm/elia.h is now removed since comempci.c
was the only user. What's the sttus of the eLIA platform?

But COMEMPCI fails with a different error - this init/main.o build error
is present for CONFIG_PCI=y, CONFIG_COMEMPCI=n, so the dependency of PCI
on BROKEN is still required (unless it gets fixed).

> Regards
> Greg

cu
Adrian


<-- snip -->


The COMEMPCI code didn't even compile.

Greg Ungerer said:
I think we should just remove the underlying comempci access
code which is the only user of this (arch/m68knommu/kernel/comempci.c).
Nobody has used it in a very long time. And the hardware itself is
old, and completely brain-damaged by design.

Signed-off-by: Adrian Bunk <bunk@kernel.org>

---

arch/m68knommu/Kconfig | 4
arch/m68knommu/include/asm/anchor.h | 112 ---
arch/m68knommu/include/asm/elia.h | 41 -
arch/m68knommu/include/asm/mcfpci.h | 119 ---
arch/m68knommu/include/asm/pci.h | 23
arch/m68knommu/kernel/Makefile | 1
arch/m68knommu/kernel/comempci.c | 980 ----------------------------
7 files changed, 1280 deletions(-)

6c2fed7cd1aad31f7c1518cfcb0d7d8f438ba8a4
diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig
index 77a5bdf..15ffd55 100644
--- a/arch/m68knommu/Kconfig
+++ b/arch/m68knommu/Kconfig
@@ -706,10 +706,6 @@ config PCI
help
Support for PCI bus.

-config COMEMPCI
- bool "CO-MEM lite PCI controller support"
- depends on (M5307 || M5407)
-
source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"
diff --git a/arch/m68knommu/include/asm/anchor.h b/arch/m68knommu/include/asm/anchor.h
deleted file mode 100644
index 871c0d5..0000000
--- a/arch/m68knommu/include/asm/anchor.h
+++ /dev/null
@@ -1,112 +0,0 @@
-/****************************************************************************/
-
-/*
- * anchor.h -- Anchor CO-MEM Lite PCI host bridge part.
- *
- * (C) Copyright 2000, Moreton Bay (www.moreton.com.au)
- */
-
-/****************************************************************************/
-#ifndef anchor_h
-#define anchor_h
-/****************************************************************************/
-
-/*
- * Define basic addressing info.
- */
-#if defined(CONFIG_M5407C3)
-#define COMEM_BASE 0xFFFF0000 /* Base of CO-MEM address space */
-#define COMEM_IRQ 25 /* IRQ of anchor part */
-#else
-#define COMEM_BASE 0x80000000 /* Base of CO-MEM address space */
-#define COMEM_IRQ 25 /* IRQ of anchor part */
-#endif
-
-/****************************************************************************/
-
-/*
- * 4-byte registers of CO-MEM, so adjust register addresses for
- * easy access. Handy macro for word access too.
- */
-#define LREG(a) ((a) >> 2)
-#define WREG(a) ((a) >> 1)
-
-
-/*
- * Define base addresses within CO-MEM Lite register address space.
- */
-#define COMEM_I2O 0x0000 /* I2O registers */
-#define COMEM_OPREGS 0x0400 /* Operation registers */
-#define COMEM_PCIBUS 0x2000 /* Direct access to PCI bus */
-#define COMEM_SHMEM 0x4000 /* Shared memory region */
-
-#define COMEM_SHMEMSIZE 0x4000 /* Size of shared memory */
-
-
-/*
- * Define CO-MEM Registers.
- */
-#define COMEM_I2OHISR 0x0030 /* I2O host interrupt status */
-#define COMEM_I2OHIMR 0x0034 /* I2O host interrupt mask */
-#define COMEM_I2OLISR 0x0038 /* I2O local interrupt status */
-#define COMEM_I2OLIMR 0x003c /* I2O local interrupt mask */
-#define COMEM_IBFPFIFO 0x0040 /* I2O inbound free/post FIFO */
-#define COMEM_OBPFFIFO 0x0044 /* I2O outbound post/free FIFO */
-#define COMEM_IBPFFIFO 0x0048 /* I2O inbound post/free FIFO */
-#define COMEM_OBFPFIFO 0x004c /* I2O outbound free/post FIFO */
-
-#define COMEM_DAHBASE 0x0460 /* Direct access base address */
-
-#define COMEM_NVCMD 0x04a0 /* I2C serial command */
-#define COMEM_NVREAD 0x04a4 /* I2C serial read */
-#define COMEM_NVSTAT 0x04a8 /* I2C status */
-
-#define COMEM_DMALBASE 0x04b0 /* DMA local base address */
-#define COMEM_DMAHBASE 0x04b4 /* DMA host base address */
-#define COMEM_DMASIZE 0x04b8 /* DMA size */
-#define COMEM_DMACTL 0x04bc /* DMA control */
-
-#define COMEM_HCTL 0x04e0 /* Host control */
-#define COMEM_HINT 0x04e4 /* Host interrupt control/status */
-#define COMEM_HLDATA 0x04e8 /* Host to local data mailbox */
-#define COMEM_LINT 0x04f4 /* Local interrupt contole status */
-#define COMEM_LHDATA 0x04f8 /* Local to host data mailbox */
-
-#define COMEM_LBUSCFG 0x04fc /* Local bus configuration */
-
-
-/*
- * Commands and flags for use with Direct Access Register.
- */
-#define COMEM_DA_IACK 0x00000000 /* Interrupt acknowledge (read) */
-#define COMEM_DA_SPCL 0x00000010 /* Special cycle (write) */
-#define COMEM_DA_MEMRD 0x00000004 /* Memory read cycle */
-#define COMEM_DA_MEMWR 0x00000004 /* Memory write cycle */
-#define COMEM_DA_IORD 0x00000002 /* I/O read cycle */
-#define COMEM_DA_IOWR 0x00000002 /* I/O write cycle */
-#define COMEM_DA_CFGRD 0x00000006 /* Configuration read cycle */
-#define COMEM_DA_CFGWR 0x00000006 /* Configuration write cycle */
-
-#define COMEM_DA_ADDR(a) ((a) & 0xffffe000)
-
-#define COMEM_DA_OFFSET(a) ((a) & 0x00001fff)
-
-
-/*
- * The PCI bus will be limited in what slots will actually be used.
- * Define valid device numbers for different boards.
- */
-#if defined(CONFIG_M5407C3)
-#define COMEM_MINDEV 14 /* Minimum valid DEVICE */
-#define COMEM_MAXDEV 14 /* Maximum valid DEVICE */
-#define COMEM_BRIDGEDEV 15 /* Slot bridge is in */
-#else
-#define COMEM_MINDEV 0 /* Minimum valid DEVICE */
-#define COMEM_MAXDEV 3 /* Maximum valid DEVICE */
-#endif
-
-#define COMEM_MAXPCI (COMEM_MAXDEV+1) /* Maximum PCI devices */
-
-
-/****************************************************************************/
-#endif /* anchor_h */
diff --git a/arch/m68knommu/include/asm/elia.h b/arch/m68knommu/include/asm/elia.h
deleted file mode 100644
index e037d4e..0000000
--- a/arch/m68knommu/include/asm/elia.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/****************************************************************************/
-
-/*
- * elia.h -- Lineo (formerly Moreton Bay) eLIA platform support.
- *
- * (C) Copyright 1999-2000, Moreton Bay (www.moreton.com.au)
- * (C) Copyright 1999-2000, Lineo (www.lineo.com)
- */
-
-/****************************************************************************/
-#ifndef elia_h
-#define elia_h
-/****************************************************************************/
-
-#include <asm/coldfire.h>
-
-#ifdef CONFIG_eLIA
-
-/*
- * The serial port DTR and DCD lines are also on the Parallel I/O
- * as well, so define those too.
- */
-
-#define eLIA_DCD1 0x0001
-#define eLIA_DCD0 0x0002
-#define eLIA_DTR1 0x0004
-#define eLIA_DTR0 0x0008
-
-#define eLIA_PCIRESET 0x0020
-
-/*
- * Kernel macros to set and unset the LEDs.
- */
-#ifndef __ASSEMBLY__
-extern unsigned short ppdata;
-#endif /* __ASSEMBLY__ */
-
-#endif /* CONFIG_eLIA */
-
-/****************************************************************************/
-#endif /* elia_h */
diff --git a/arch/m68knommu/include/asm/mcfpci.h b/arch/m68knommu/include/asm/mcfpci.h
deleted file mode 100644
index f1507dd..0000000
--- a/arch/m68knommu/include/asm/mcfpci.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/****************************************************************************/
-
-/*
- * mcfpci.h -- PCI bridge on ColdFire eval boards.
- *
- * (C) Copyright 2000, Greg Ungerer (gerg@snapgear.com)
- * (C) Copyright 2000, Lineo Inc. (www.lineo.com)
- */
-
-/****************************************************************************/
-#ifndef mcfpci_h
-#define mcfpci_h
-/****************************************************************************/
-
-
-#ifdef CONFIG_PCI
-
-/*
- * Address regions in the PCI address space are not mapped into the
- * normal memory space of the ColdFire. They must be accessed via
- * handler routines. This is easy for I/O space (inb/outb/etc) but
- * needs some code changes to support ordinary memory. Interrupts
- * also need to be vectored through the PCI handler first, then it
- * will call the actual driver sub-handlers.
- */
-
-/*
- * Un-define all the standard I/O access routines.
- */
-#undef inb
-#undef inw
-#undef inl
-#undef inb_p
-#undef inw_p
-#undef insb
-#undef insw
-#undef insl
-#undef outb
-#undef outw
-#undef outl
-#undef outb_p
-#undef outw_p
-#undef outsb
-#undef outsw
-#undef outsl
-
-#undef request_irq
-#undef free_irq
-
-#undef bus_to_virt
-#undef virt_to_bus
-
-
-/*
- * Re-direct all I/O memory accesses functions to PCI specific ones.
- */
-#define inb pci_inb
-#define inw pci_inw
-#define inl pci_inl
-#define inb_p pci_inb
-#define inw_p pci_inw
-#define insb pci_insb
-#define insw pci_insw
-#define insl pci_insl
-
-#define outb pci_outb
-#define outw pci_outw
-#define outl pci_outl
-#define outb_p pci_outb
-#define outw_p pci_outw
-#define outsb pci_outsb
-#define outsw pci_outsw
-#define outsl pci_outsl
-
-#define request_irq pci_request_irq
-#define free_irq pci_free_irq
-
-#define virt_to_bus pci_virt_to_bus
-#define bus_to_virt pci_bus_to_virt
-
-#define CONFIG_COMEMPCI 1
-
-
-/*
- * Prototypes of the real PCI functions (defined in bios32.c).
- */
-unsigned char pci_inb(unsigned int addr);
-unsigned short pci_inw(unsigned int addr);
-unsigned int pci_inl(unsigned int addr);
-void pci_insb(void *addr, void *buf, int len);
-void pci_insw(void *addr, void *buf, int len);
-void pci_insl(void *addr, void *buf, int len);
-
-void pci_outb(unsigned char val, unsigned int addr);
-void pci_outw(unsigned short val, unsigned int addr);
-void pci_outl(unsigned int val, unsigned int addr);
-void pci_outsb(void *addr, void *buf, int len);
-void pci_outsw(void *addr, void *buf, int len);
-void pci_outsl(void *addr, void *buf, int len);
-
-int pci_request_irq(unsigned int irq,
- void (*handler)(int, void *, struct pt_regs *),
- unsigned long flags,
- const char *device,
- void *dev_id);
-void pci_free_irq(unsigned int irq, void *dev_id);
-
-void *pci_bmalloc(int size);
-void pci_bmfree(void *bmp, int len);
-void pci_copytoshmem(unsigned long bmp, void *src, int size);
-void pci_copyfromshmem(void *dst, unsigned long bmp, int size);
-unsigned long pci_virt_to_bus(volatile void *address);
-void *pci_bus_to_virt(unsigned long address);
-void pci_bmcpyto(void *dst, void *src, int len);
-void pci_bmcpyfrom(void *dst, void *src, int len);
-
-#endif /* CONFIG_PCI */
-/****************************************************************************/
-#endif /* mcfpci_h */
diff --git a/arch/m68knommu/include/asm/pci.h b/arch/m68knommu/include/asm/pci.h
index a13f3cc..8031d1d 100644
--- a/arch/m68knommu/include/asm/pci.h
+++ b/arch/m68knommu/include/asm/pci.h
@@ -3,27 +3,4 @@

#include <asm-m68k/pci.h>

-#ifdef CONFIG_COMEMPCI
-/*
- * These are pretty much arbitary with the CoMEM implementation.
- * We have the whole address space to ourselves.
- */
-#define PCIBIOS_MIN_IO 0x100
-#define PCIBIOS_MIN_MEM 0x00010000
-
-#define pcibios_scan_all_fns(a, b) 0
-
-/*
- * Return whether the given PCI device DMA address mask can
- * be supported properly. For example, if your device can
- * only drive the low 24-bits during PCI bus mastering, then
- * you would pass 0x00ffffff as the mask to this function.
- */
-static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
-{
- return 1;
-}
-
-#endif /* CONFIG_COMEMPCI */
-
#endif /* M68KNOMMU_PCI_H */
diff --git a/arch/m68knommu/kernel/Makefile b/arch/m68knommu/kernel/Makefile
index f0eab3d..37c3fc0 100644
--- a/arch/m68knommu/kernel/Makefile
+++ b/arch/m68knommu/kernel/Makefile
@@ -8,4 +8,3 @@ obj-y += dma.o entry.o init_task.o irq.o m68k_ksyms.o process.o ptrace.o \
setup.o signal.o syscalltable.o sys_m68k.o time.o traps.o

obj-$(CONFIG_MODULES) += module.o
-obj-$(CONFIG_COMEMPCI) += comempci.o
diff --git a/arch/m68knommu/kernel/comempci.c b/arch/m68knommu/kernel/comempci.c
deleted file mode 100644
index 0a68b5a..0000000
--- a/arch/m68knommu/kernel/comempci.c
+++ /dev/null
@@ -1,980 +0,0 @@
-/*****************************************************************************/
-
-/*
- * comemlite.c -- PCI access code for embedded CO-MEM Lite PCI controller.
- *
- * (C) Copyright 1999-2003, Greg Ungerer (gerg@snapgear.com).
- * (C) Copyright 2000, Lineo (www.lineo.com)
- */
-
-/*****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/ptrace.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#include <asm/irq.h>
-#include <asm/anchor.h>
-
-#ifdef CONFIG_eLIA
-#include <asm/elia.h>
-#endif
-
-/*****************************************************************************/
-
-/*
- * Debug configuration defines. DEBUGRES sets debugging output for
- * the resource allocation phase. DEBUGPCI traces on pcibios_ function
- * calls, and DEBUGIO traces all accesses to devices on the PCI bus.
- */
-/*#define DEBUGRES 1*/
-/*#define DEBUGPCI 1*/
-/*#define DEBUGIO 1*/
-
-/*****************************************************************************/
-
-/*
- * PCI markers for bus present and active slots.
- */
-int pci_bus_is_present = 0;
-unsigned long pci_slotmask = 0;
-
-/*
- * We may or may not need to swap the bytes of PCI bus tranfers.
- * The endianess is re-roder automatically by the CO-MEM, but it
- * will get the wrong byte order for a pure data stream.
- */
-#define pci_byteswap 0
-
-
-/*
- * Resource tracking. The CO-MEM part creates a virtual address
- * space that all the PCI devices live in - it is not in any way
- * directly mapped into the ColdFire address space. So we can
- * really assign any resources we like to devices, as long as
- * they do not clash with other PCI devices.
- */
-unsigned int pci_iobase = PCIBIOS_MIN_IO; /* Arbitrary start address */
-unsigned int pci_membase = PCIBIOS_MIN_MEM; /* Arbitrary start address */
-
-#define PCI_MINIO 0x100 /* 256 byte minimum I/O */
-#define PCI_MINMEM 0x00010000 /* 64k minimum chunk */
-
-/*
- * The CO-MEM's shared memory segment is visible inside the PCI
- * memory address space. We need to keep track of the address that
- * this is mapped at, to setup the bus masters pointers.
- */
-unsigned int pci_shmemaddr;
-
-/*****************************************************************************/
-
-void pci_interrupt(int irq, void *id, struct pt_regs *fp);
-
-/*****************************************************************************/
-
-/*
- * Some platforms have custom ways of reseting the PCI bus.
- */
-
-void pci_resetbus(void)
-{
-#ifdef CONFIG_eLIA
- int i;
-
-#ifdef DEBUGPCI
- printk(KERN_DEBUG "pci_resetbus()\n");
-#endif
-
- *((volatile unsigned short *) (MCF_MBAR+MCFSIM_PADDR)) |= eLIA_PCIRESET;
- for (i = 0; (i < 1000); i++) {
- *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) =
- (ppdata | eLIA_PCIRESET);
- }
-
-
- *((volatile unsigned short *) (MCF_MBAR + MCFSIM_PADAT)) = ppdata;
-#endif
-}
-
-/*****************************************************************************/
-
-int pcibios_assign_resource_slot(int slot)
-{
- volatile unsigned long *rp;
- volatile unsigned char *ip;
- unsigned int idsel, addr, val, align, i;
- int bar;
-
-#ifdef DEBUGPCI
- printk(KERN_INFO "pcibios_assign_resource_slot(slot=%x)\n", slot);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
-
- /* Try to assign resource to each BAR */
- for (bar = 0; (bar < 6); bar++) {
- addr = COMEM_PCIBUS + PCI_BASE_ADDRESS_0 + (bar * 4);
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
- val = rp[LREG(addr)];
-#ifdef DEBUGRES
- printk(KERN_DEBUG "-----------------------------------"
- "-------------------------------------\n");
- printk(KERN_DEBUG "BAR[%d]: read=%08x ", bar, val);
-#endif
-
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
- rp[LREG(addr)] = 0xffffffff;
-
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
- val = rp[LREG(addr)];
-#ifdef DEBUGRES
- printk(KERN_DEBUG "write=%08x ", val);
-#endif
- if (val == 0) {
-#ifdef DEBUGRES
- printk(KERN_DEBUG "\n");
-#endif
- continue;
- }
-
- /* Determine space required by BAR */
- /* FIXME: this should go backwords from 0x80000000... */
- for (i = 0; (i < 32); i++) {
- if ((0x1 << i) & (val & 0xfffffffc))
- break;
- }
-
-#ifdef DEBUGRES
- printk(KERN_DEBUG "size=%08x(%d)\n", (0x1 << i), i);
-#endif
- i = 0x1 << i;
-
- /* Assign a resource */
- if (val & PCI_BASE_ADDRESS_SPACE_IO) {
- if (i < PCI_MINIO)
- i = PCI_MINIO;
-#ifdef DEBUGRES
- printk(KERN_DEBUG "BAR[%d]: IO size=%08x iobase=%08x\n",
- bar, i, pci_iobase);
-#endif
- if (i > 0xffff) {
- /* Invalid size?? */
- val = 0 | PCI_BASE_ADDRESS_SPACE_IO;
-#ifdef DEBUGRES
- printk(KERN_DEBUG "BAR[%d]: too big for IO??\n", bar);
-#endif
- } else {
- /* Check for un-alignment */
- if ((align = pci_iobase % i))
- pci_iobase += (i - align);
- val = pci_iobase | PCI_BASE_ADDRESS_SPACE_IO;
- pci_iobase += i;
- }
- } else {
- if (i < PCI_MINMEM)
- i = PCI_MINMEM;
-#ifdef DEBUGRES
- printk(KERN_DEBUG "BAR[%d]: MEMORY size=%08x membase=%08x\n",
- bar, i, pci_membase);
-#endif
- /* Check for un-alignment */
- if ((align = pci_membase % i))
- pci_membase += (i - align);
- val = pci_membase | PCI_BASE_ADDRESS_SPACE_MEMORY;
- pci_membase += i;
- }
-
- /* Write resource back into BAR register */
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
- rp[LREG(addr)] = val;
-#ifdef DEBUGRES
- printk(KERN_DEBUG "BAR[%d]: assigned bar=%08x\n", bar, val);
-#endif
- }
-
-#ifdef DEBUGRES
- printk(KERN_DEBUG "-----------------------------------"
- "-------------------------------------\n");
-#endif
-
- /* Assign IRQ if one is wanted... */
- ip = (volatile unsigned char *) (COMEM_BASE + COMEM_PCIBUS);
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
-
- addr = (PCI_INTERRUPT_PIN & 0xfc) + (~PCI_INTERRUPT_PIN & 0x03);
- if (ip[addr]) {
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
- addr = (PCI_INTERRUPT_LINE & 0xfc)+(~PCI_INTERRUPT_LINE & 0x03);
- ip[addr] = 25;
-#ifdef DEBUGRES
- printk(KERN_DEBUG "IRQ LINE=25\n");
-#endif
- }
-
- return(0);
-}
-
-/*****************************************************************************/
-
-int pcibios_enable_slot(int slot)
-{
- volatile unsigned long *rp;
- volatile unsigned short *wp;
- unsigned int idsel, addr;
- unsigned short cmd;
-
-#ifdef DEBUGPCI
- printk(KERN_DEBUG "pcibios_enbale_slot(slot=%x)\n", slot);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- wp = (volatile unsigned short *) COMEM_BASE;
- idsel = COMEM_DA_ADDR(0x1 << (slot + 16));
-
- /* Get current command settings */
- addr = COMEM_PCIBUS + PCI_COMMAND;
- addr = (addr & ~0x3) + (~addr & 0x02);
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGRD | idsel;
- cmd = wp[WREG(addr)];
- /*val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);*/
-
- /* Enable I/O and memory accesses to this device */
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_CFGWR | idsel;
- cmd |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
- wp[WREG(addr)] = cmd;
-
- return(0);
-}
-
-/*****************************************************************************/
-
-void pcibios_assign_resources(void)
-{
- volatile unsigned long *rp;
- unsigned long sel, id;
- int slot;
-
- rp = (volatile unsigned long *) COMEM_BASE;
-
- /*
- * Do a quick scan of the PCI bus and see what is here.
- */
- for (slot = COMEM_MINDEV; (slot <= COMEM_MAXDEV); slot++) {
- sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
- rp[LREG(COMEM_DAHBASE)] = sel;
- rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
- id = rp[LREG(COMEM_PCIBUS)];
- if ((id != 0) && ((id & 0xffff0000) != (sel & 0xffff0000))) {
- printk(KERN_INFO "PCI: slot=%d id=%08x\n", slot, (int) id);
- pci_slotmask |= 0x1 << slot;
- pcibios_assign_resource_slot(slot);
- pcibios_enable_slot(slot);
- }
- }
-}
-
-/*****************************************************************************/
-
-int pcibios_init(void)
-{
- volatile unsigned long *rp;
- unsigned long sel, id;
- int slot;
-
-#ifdef DEBUGPCI
- printk(KERN_DEBUG "pcibios_init()\n");
-#endif
-
- pci_resetbus();
-
- /*
- * Do some sort of basic check to see if the CO-MEM part
- * is present... This works ok, but I think we really need
- * something better...
- */
- rp = (volatile unsigned long *) COMEM_BASE;
- if ((rp[LREG(COMEM_LBUSCFG)] & 0xff) != 0x50) {
- printk(KERN_INFO "PCI: no PCI bus present\n");
- return(0);
- }
-
-#ifdef COMEM_BRIDGEDEV
- /*
- * Setup the PCI bridge device first. It needs resources too,
- * so that bus masters can get to its shared memory.
- */
- slot = COMEM_BRIDGEDEV;
- sel = COMEM_DA_CFGRD | COMEM_DA_ADDR(0x1 << (slot + 16));
- rp[LREG(COMEM_DAHBASE)] = sel;
- rp[LREG(COMEM_PCIBUS)] = 0; /* Clear bus */
- id = rp[LREG(COMEM_PCIBUS)];
- if ((id == 0) || ((id & 0xffff0000) == (sel & 0xffff0000))) {
- printk(KERN_INFO "PCI: no PCI bus bridge present\n");
- return(0);
- }
-
- printk(KERN_INFO "PCI: bridge device at slot=%d id=%08x\n", slot, (int) id);
- pci_slotmask |= 0x1 << slot;
- pci_shmemaddr = pci_membase;
- pcibios_assign_resource_slot(slot);
- pcibios_enable_slot(slot);
-#endif
-
- pci_bus_is_present = 1;
-
- /* Get PCI irq for local vectoring */
- if (request_irq(COMEM_IRQ, pci_interrupt, 0, "PCI bridge", NULL)) {
- printk(KERN_WARNING "PCI: failed to acquire interrupt %d\n", COMEM_IRQ);
- } else {
- mcf_autovector(COMEM_IRQ);
- }
-
- pcibios_assign_resources();
-
- return(0);
-}
-
-/*****************************************************************************/
-
-char *pcibios_setup(char *option)
-{
- /* Nothing for us to handle. */
- return(option);
-}
-/*****************************************************************************/
-
-void pcibios_fixup_bus(struct pci_bus *b)
-{
-}
-
-/*****************************************************************************/
-
-void pcibios_align_resource(void *data, struct resource *res,
- resource_size_t size, resource_size_t align)
-{
-}
-
-/*****************************************************************************/
-
-int pcibios_enable_device(struct pci_dev *dev, int mask)
-{
- int slot;
-
- slot = PCI_SLOT(dev->devfn);
- if ((dev->bus == 0) && (pci_slotmask & (1 << slot)))
- pcibios_enable_slot(slot);
- return(0);
-}
-
-/*****************************************************************************/
-
-/*
- * Local routines to interrcept the standard I/O and vector handling
- * code. Don't include this 'till now - initialization code above needs
- * access to the real code too.
- */
-#include <asm/mcfpci.h>
-
-/*****************************************************************************/
-
-void pci_outb(unsigned char val, unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned char *bp;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outb(val=%02x,addr=%x)\n", val, addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- bp = (volatile unsigned char *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
- addr = (addr & ~0x3) + (~addr & 0x03);
- bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
-}
-
-/*****************************************************************************/
-
-void pci_outw(unsigned short val, unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned short *sp;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outw(val=%04x,addr=%x)\n", val, addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- sp = (volatile unsigned short *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
- addr = (addr & ~0x3) + (~addr & 0x02);
- if (pci_byteswap)
- val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
- sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
-}
-
-/*****************************************************************************/
-
-void pci_outl(unsigned int val, unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned int *lp;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outl(val=%08x,addr=%x)\n", val, addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- lp = (volatile unsigned int *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(addr);
-
- if (pci_byteswap)
- val = (val << 24) | ((val & 0x0000ff00) << 8) |
- ((val & 0x00ff0000) >> 8) | (val >> 24);
-
- lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))] = val;
-}
-
-/*****************************************************************************/
-
-unsigned long pci_blmask[] = {
- 0x000000e0,
- 0x000000d0,
- 0x000000b0,
- 0x00000070
-};
-
-unsigned char pci_inb(unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned char *bp;
- unsigned long r;
- unsigned char val;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_inb(addr=%x)\n", addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- bp = (volatile unsigned char *) COMEM_BASE;
-
- r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_blmask[(addr & 0x3)];
- rp[LREG(COMEM_DAHBASE)] = r;
-
- addr = (addr & ~0x3) + (~addr & 0x3);
- val = bp[(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
- return(val);
-}
-
-/*****************************************************************************/
-
-unsigned long pci_bwmask[] = {
- 0x000000c0,
- 0x000000c0,
- 0x00000030,
- 0x00000030
-};
-
-unsigned short pci_inw(unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned short *sp;
- unsigned long r;
- unsigned short val;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_inw(addr=%x)", addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- r = COMEM_DA_IORD | COMEM_DA_ADDR(addr) | pci_bwmask[(addr & 0x3)];
- rp[LREG(COMEM_DAHBASE)] = r;
-
- sp = (volatile unsigned short *) COMEM_BASE;
- addr = (addr & ~0x3) + (~addr & 0x02);
- val = sp[WREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
- if (pci_byteswap)
- val = ((val & 0xff) << 8) | ((val >> 8) & 0xff);
-#ifdef DEBUGIO
- printk(KERN_DEBUG "=%04x\n", val);
-#endif
- return(val);
-}
-
-/*****************************************************************************/
-
-unsigned int pci_inl(unsigned int addr)
-{
- volatile unsigned long *rp;
- volatile unsigned int *lp;
- unsigned int val;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_inl(addr=%x)", addr);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- lp = (volatile unsigned int *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(addr);
- val = lp[LREG(COMEM_PCIBUS + COMEM_DA_OFFSET(addr))];
-
- if (pci_byteswap)
- val = (val << 24) | ((val & 0x0000ff00) << 8) |
- ((val & 0x00ff0000) >> 8) | (val >> 24);
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "=%08x\n", val);
-#endif
- return(val);
-}
-
-/*****************************************************************************/
-
-void pci_outsb(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned char *bp;
- unsigned char *dp = (unsigned char *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outsb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
-
- a = (a & ~0x3) + (~a & 0x03);
- bp = (volatile unsigned char *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--)
- *bp = *dp++;
-}
-
-/*****************************************************************************/
-
-void pci_outsw(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned short *wp;
- unsigned short w, *dp = (unsigned short *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outsw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
-
- a = (a & ~0x3) + (~a & 0x2);
- wp = (volatile unsigned short *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--) {
- w = *dp++;
- if (pci_byteswap)
- w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
- *wp = w;
- }
-}
-
-/*****************************************************************************/
-
-void pci_outsl(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned long *lp;
- unsigned long l, *dp = (unsigned long *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_outsl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IOWR | COMEM_DA_ADDR(a);
-
- lp = (volatile unsigned long *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--) {
- l = *dp++;
- if (pci_byteswap)
- l = (l << 24) | ((l & 0x0000ff00) << 8) |
- ((l & 0x00ff0000) >> 8) | (l >> 24);
- *lp = l;
- }
-}
-
-/*****************************************************************************/
-
-void pci_insb(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned char *bp;
- unsigned char *dp = (unsigned char *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_insb(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
-
- a = (a & ~0x3) + (~a & 0x03);
- bp = (volatile unsigned char *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--)
- *dp++ = *bp;
-}
-
-/*****************************************************************************/
-
-void pci_insw(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned short *wp;
- unsigned short w, *dp = (unsigned short *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_insw(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
-
- a = (a & ~0x3) + (~a & 0x2);
- wp = (volatile unsigned short *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--) {
- w = *wp;
- if (pci_byteswap)
- w = ((w & 0xff) << 8) | ((w >> 8) & 0xff);
- *dp++ = w;
- }
-}
-
-/*****************************************************************************/
-
-void pci_insl(void *addr, void *buf, int len)
-{
- volatile unsigned long *rp;
- volatile unsigned long *lp;
- unsigned long l, *dp = (unsigned long *) buf;
- unsigned int a = (unsigned int) addr;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_insl(addr=%x,buf=%x,len=%d)\n", (int)addr, (int)buf, len);
-#endif
-
- rp = (volatile unsigned long *) COMEM_BASE;
- rp[LREG(COMEM_DAHBASE)] = COMEM_DA_IORD | COMEM_DA_ADDR(a);
-
- lp = (volatile unsigned long *)
- (COMEM_BASE + COMEM_PCIBUS + COMEM_DA_OFFSET(a));
-
- while (len--) {
- l = *lp;
- if (pci_byteswap)
- l = (l << 24) | ((l & 0x0000ff00) << 8) |
- ((l & 0x00ff0000) >> 8) | (l >> 24);
- *dp++ = l;
- }
-}
-
-/*****************************************************************************/
-
-struct pci_localirqlist {
- void (*handler)(int, void *, struct pt_regs *);
- const char *device;
- void *dev_id;
-};
-
-struct pci_localirqlist pci_irqlist[COMEM_MAXPCI];
-
-/*****************************************************************************/
-
-int pci_request_irq(unsigned int irq,
- void (*handler)(int, void *, struct pt_regs *),
- unsigned long flags, const char *device, void *dev_id)
-{
- int i;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_request_irq(irq=%d,handler=%x,flags=%x,device=%s,"
- "dev_id=%x)\n", irq, (int) handler, (int) flags, device,
- (int) dev_id);
-#endif
-
- /* Check if this interrupt handler is already lodged */
- for (i = 0; (i < COMEM_MAXPCI); i++) {
- if (pci_irqlist[i].handler == handler)
- return(0);
- }
-
- /* Find a free spot to put this handler */
- for (i = 0; (i < COMEM_MAXPCI); i++) {
- if (pci_irqlist[i].handler == 0) {
- pci_irqlist[i].handler = handler;
- pci_irqlist[i].device = device;
- pci_irqlist[i].dev_id = dev_id;
- return(0);
- }
- }
-
- /* Couldn't fit?? */
- return(1);
-}
-
-/*****************************************************************************/
-
-void pci_free_irq(unsigned int irq, void *dev_id)
-{
- int i;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_free_irq(irq=%d,dev_id=%x)\n", irq, (int) dev_id);
-#endif
-
- if (dev_id == (void *) NULL)
- return;
-
- /* Check if this interrupt handler is lodged */
- for (i = 0; (i < COMEM_MAXPCI); i++) {
- if (pci_irqlist[i].dev_id == dev_id) {
- pci_irqlist[i].handler = NULL;
- pci_irqlist[i].device = NULL;
- pci_irqlist[i].dev_id = NULL;
- break;
- }
- }
-}
-
-/*****************************************************************************/
-
-void pci_interrupt(int irq, void *id, struct pt_regs *fp)
-{
- int i;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_interrupt(irq=%d,id=%x,fp=%x)\n", irq, (int) id, (int) fp);
-#endif
-
- for (i = 0; (i < COMEM_MAXPCI); i++) {
- if (pci_irqlist[i].handler)
- (*pci_irqlist[i].handler)(irq,pci_irqlist[i].dev_id,fp);
- }
-}
-
-/*****************************************************************************/
-
-/*
- * The shared memory region is broken up into contiguous 512 byte
- * regions for easy allocation... This is not an optimal solution
- * but it makes allocation and freeing regions really easy.
- */
-
-#define PCI_MEMSLOTSIZE 512
-#define PCI_MEMSLOTS (COMEM_SHMEMSIZE / PCI_MEMSLOTSIZE)
-
-char pci_shmemmap[PCI_MEMSLOTS];
-
-
-void *pci_bmalloc(int size)
-{
- int i, j, nrslots;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_bmalloc(size=%d)\n", size);
-#endif
-
- if (size <= 0)
- return((void *) NULL);
-
- nrslots = (size - 1) / PCI_MEMSLOTSIZE;
-
- for (i = 0; (i < (PCI_MEMSLOTS-nrslots)); i++) {
- if (pci_shmemmap[i] == 0) {
- for (j = i+1; (j < (i+nrslots)); j++) {
- if (pci_shmemmap[j])
- goto restart;
- }
-
- for (j = i; (j <= i+nrslots); j++)
- pci_shmemmap[j] = 1;
- break;
- }
-restart:
- }
-
- return((void *) (COMEM_BASE + COMEM_SHMEM + (i * PCI_MEMSLOTSIZE)));
-}
-
-/*****************************************************************************/
-
-void pci_bmfree(void *mp, int size)
-{
- int i, j, nrslots;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_bmfree(mp=%x,size=%d)\n", (int) mp, size);
-#endif
-
- nrslots = size / PCI_MEMSLOTSIZE;
- i = (((unsigned long) mp) - (COMEM_BASE + COMEM_SHMEM)) /
- PCI_MEMSLOTSIZE;
-
- for (j = i; (j < (i+nrslots)); j++)
- pci_shmemmap[j] = 0;
-}
-
-/*****************************************************************************/
-
-unsigned long pci_virt_to_bus(volatile void *address)
-{
- unsigned long l;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_virt_to_bus(address=%x)", (int) address);
-#endif
-
- l = ((unsigned long) address) - COMEM_BASE;
-#ifdef DEBUGIO
- printk(KERN_DEBUG "=%x\n", (int) (l+pci_shmemaddr));
-#endif
- return(l + pci_shmemaddr);
-}
-
-/*****************************************************************************/
-
-void *pci_bus_to_virt(unsigned long address)
-{
- unsigned long l;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_bus_to_virt(address=%x)", (int) address);
-#endif
-
- l = address - pci_shmemaddr;
-#ifdef DEBUGIO
- printk(KERN_DEBUG "=%x\n", (int) (address + COMEM_BASE));
-#endif
- return((void *) (address + COMEM_BASE));
-}
-
-/*****************************************************************************/
-
-void pci_bmcpyto(void *dst, void *src, int len)
-{
- unsigned long *dp, *sp, val;
- unsigned char *dcp, *scp;
- int i, j;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_bmcpyto(dst=%x,src=%x,len=%d)\n", (int)dst, (int)src, len);
-#endif
-
- dp = (unsigned long *) dst;
- sp = (unsigned long *) src;
- i = len >> 2;
-
-#if 0
- printk(KERN_INFO "DATA:");
- scp = (unsigned char *) sp;
- for (i = 0; (i < len); i++) {
- if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
- printk(KERN_INFO "%02x ", *scp++);
- }
- printk(KERN_INFO "\n");
-#endif
-
- for (j = 0; (i >= 0); i--, j++) {
- val = *sp++;
- val = (val << 24) | ((val & 0x0000ff00) << 8) |
- ((val & 0x00ff0000) >> 8) | (val >> 24);
- *dp++ = val;
- }
-
- if (len & 0x3) {
- dcp = (unsigned char *) dp;
- scp = ((unsigned char *) sp) + 3;
- for (i = 0; (i < (len & 0x3)); i++)
- *dcp++ = *scp--;
- }
-}
-
-/*****************************************************************************/
-
-void pci_bmcpyfrom(void *dst, void *src, int len)
-{
- unsigned long *dp, *sp, val;
- unsigned char *dcp, *scp;
- int i;
-
-#ifdef DEBUGIO
- printk(KERN_DEBUG "pci_bmcpyfrom(dst=%x,src=%x,len=%d)\n",(int)dst,(int)src,len);
-#endif
-
- dp = (unsigned long *) dst;
- sp = (unsigned long *) src;
- i = len >> 2;
-
- for (; (i >= 0); i--) {
- val = *sp++;
- val = (val << 24) | ((val & 0x0000ff00) << 8) |
- ((val & 0x00ff0000) >> 8) | (val >> 24);
- *dp++ = val;
- }
-
- if (len & 0x3) {
- dcp = ((unsigned char *) dp) + 3;
- scp = (unsigned char *) sp;
- for (i = 0; (i < (len & 0x3)); i++)
- *dcp++ = *scp--;
- }
-
-#if 0
- printk(KERN_INFO "DATA:");
- dcp = (unsigned char *) dst;
- for (i = 0; (i < len); i++) {
- if ((i % 16) == 0) printk(KERN_INFO "\n%04x: ", i);
- printk(KERN_INFO "%02x ", *dcp++);
- }
- printk(KERN_INFO "\n");
-#endif
-}
-
-/*****************************************************************************/
-
-void *pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma_addr)
-{
- void *mp;
- if ((mp = pci_bmalloc(size)) != NULL) {
- dma_addr = mp - (COMEM_BASE + COMEM_SHMEM);
- return(mp);
- }
- *dma_addr = (dma_addr_t) NULL;
- return(NULL);
-}
-
-/*****************************************************************************/
-
-void pci_free_consistent(struct pci_dev *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr)
-{
- pci_bmfree(cpu_addr, size);
-}
-
-/*****************************************************************************/


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