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Subject[patch 14/18] m68k: remove the dead PCI code
From: Adrian Bunk <bunk@kernel.org>

This patch removes the no longer used m68k PCI code.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/m68k/Kconfig | 4
arch/m68k/kernel/Makefile | 1
arch/m68k/kernel/bios32.c | 516 ----------------------------------------------
include/asm-m68k/dma.h | 4
include/asm-m68k/io.h | 66 -----
include/asm-m68k/pci.h | 46 ----
6 files changed, 7 insertions(+), 630 deletions(-)

--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -122,10 +122,6 @@ config ATARI
this kernel on an Atari, say Y here and browse the material
available in <file:Documentation/m68k>; otherwise say N.

-config PCI
- bool
- help
-
config MAC
bool "Macintosh support"
select MMU_MOTOROLA if MMU
--- a/arch/m68k/kernel/Makefile
+++ b/arch/m68k/kernel/Makefile
@@ -14,5 +14,4 @@ obj-y := entry.o process.o traps.o ints.

devres-y = ../../../kernel/irq/devres.o

-obj-$(CONFIG_PCI) += bios32.o
obj-y$(CONFIG_MMU_SUN3) += dma.o # no, it's not a typo
--- a/arch/m68k/kernel/bios32.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * bios32.c - PCI BIOS functions for m68k systems.
- *
- * Written by Wout Klaren.
- *
- * Based on the DEC Alpha bios32.c by Dave Rusling and David Mosberger.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-
-#if 0
-# define DBG_DEVS(args) printk args
-#else
-# define DBG_DEVS(args)
-#endif
-
-#ifdef CONFIG_PCI
-
-/*
- * PCI support for Linux/m68k. Currently only the Hades is supported.
- *
- * The support for PCI bridges in the DEC Alpha version has
- * been removed in this version.
- */
-
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-
-#include <asm/io.h>
-#include <asm/pci.h>
-#include <asm/uaccess.h>
-
-#define KB 1024
-#define MB (1024*KB)
-#define GB (1024*MB)
-
-#define MAJOR_REV 0
-#define MINOR_REV 5
-
-/*
- * Align VAL to ALIGN, which must be a power of two.
- */
-
-#define ALIGN(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
-
-/*
- * Offsets relative to the I/O and memory base addresses from where resources
- * are allocated.
- */
-
-#define IO_ALLOC_OFFSET 0x00004000
-#define MEM_ALLOC_OFFSET 0x04000000
-
-/*
- * Declarations of hardware specific initialisation functions.
- */
-
-extern struct pci_bus_info *init_hades_pci(void);
-
-/*
- * Bus info structure of the PCI bus. A pointer to this structure is
- * put in the sysdata member of the pci_bus structure.
- */
-
-static struct pci_bus_info *bus_info;
-
-static int pci_modify = 1; /* If set, layout the PCI bus ourself. */
-static int skip_vga; /* If set do not modify base addresses
- of vga cards.*/
-static int disable_pci_burst; /* If set do not allow PCI bursts. */
-
-static unsigned int io_base;
-static unsigned int mem_base;
-
-/*
- * static void disable_dev(struct pci_dev *dev)
- *
- * Disable PCI device DEV so that it does not respond to I/O or memory
- * accesses.
- *
- * Parameters:
- *
- * dev - device to disable.
- */
-
-static void __init disable_dev(struct pci_dev *dev)
-{
- unsigned short cmd;
-
- if (((dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA) ||
- (dev->class >> 8 == PCI_CLASS_DISPLAY_VGA) ||
- (dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)) && skip_vga)
- return;
-
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
-
- cmd &= (~PCI_COMMAND_IO & ~PCI_COMMAND_MEMORY & ~PCI_COMMAND_MASTER);
- pci_write_config_word(dev, PCI_COMMAND, cmd);
-}
-
-/*
- * static void layout_dev(struct pci_dev *dev)
- *
- * Layout memory and I/O for a device.
- *
- * Parameters:
- *
- * device - device to layout memory and I/O for.
- */
-
-static void __init layout_dev(struct pci_dev *dev)
-{
- unsigned short cmd;
- unsigned int base, mask, size, reg;
- unsigned int alignto;
- int i;
-
- /*
- * Skip video cards if requested.
- */
-
- if (((dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA) ||
- (dev->class >> 8 == PCI_CLASS_DISPLAY_VGA) ||
- (dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)) && skip_vga)
- return;
-
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
-
- for (reg = PCI_BASE_ADDRESS_0, i = 0; reg <= PCI_BASE_ADDRESS_5; reg += 4, i++)
- {
- /*
- * Figure out how much space and of what type this
- * device wants.
- */
-
- pci_write_config_dword(dev, reg, 0xffffffff);
- pci_read_config_dword(dev, reg, &base);
-
- if (!base)
- {
- /* this base-address register is unused */
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
- continue;
- }
-
- /*
- * We've read the base address register back after
- * writing all ones and so now we must decode it.
- */
-
- if (base & PCI_BASE_ADDRESS_SPACE_IO)
- {
- /*
- * I/O space base address register.
- */
-
- cmd |= PCI_COMMAND_IO;
-
- base &= PCI_BASE_ADDRESS_IO_MASK;
- mask = (~base << 1) | 0x1;
- size = (mask & base) & 0xffffffff;
-
- /*
- * Align to multiple of size of minimum base.
- */
-
- alignto = max_t(unsigned int, 0x040, size);
- base = ALIGN(io_base, alignto);
- io_base = base + size;
- pci_write_config_dword(dev, reg, base | PCI_BASE_ADDRESS_SPACE_IO);
-
- dev->resource[i].start = base;
- dev->resource[i].end = dev->resource[i].start + size - 1;
- dev->resource[i].flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
-
- DBG_DEVS(("layout_dev: IO address: %lX\n", base));
- }
- else
- {
- unsigned int type;
-
- /*
- * Memory space base address register.
- */
-
- cmd |= PCI_COMMAND_MEMORY;
- type = base & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
- base &= PCI_BASE_ADDRESS_MEM_MASK;
- mask = (~base << 1) | 0x1;
- size = (mask & base) & 0xffffffff;
- switch (type)
- {
- case PCI_BASE_ADDRESS_MEM_TYPE_32:
- case PCI_BASE_ADDRESS_MEM_TYPE_64:
- break;
-
- case PCI_BASE_ADDRESS_MEM_TYPE_1M:
- printk("bios32 WARNING: slot %d, function %d "
- "requests memory below 1MB---don't "
- "know how to do that.\n",
- PCI_SLOT(dev->devfn),
- PCI_FUNC(dev->devfn));
- continue;
- }
-
- /*
- * Align to multiple of size of minimum base.
- */
-
- alignto = max_t(unsigned int, 0x1000, size);
- base = ALIGN(mem_base, alignto);
- mem_base = base + size;
- pci_write_config_dword(dev, reg, base);
-
- dev->resource[i].start = base;
- dev->resource[i].end = dev->resource[i].start + size - 1;
- dev->resource[i].flags = IORESOURCE_MEM;
-
- if (type == PCI_BASE_ADDRESS_MEM_TYPE_64)
- {
- /*
- * 64-bit address, set the highest 32 bits
- * to zero.
- */
-
- reg += 4;
- pci_write_config_dword(dev, reg, 0);
-
- i++;
- dev->resource[i].start = 0;
- dev->resource[i].end = 0;
- dev->resource[i].flags = 0;
- }
- }
- }
-
- /*
- * Enable device:
- */
-
- if (dev->class >> 8 == PCI_CLASS_NOT_DEFINED ||
- dev->class >> 8 == PCI_CLASS_NOT_DEFINED_VGA ||
- dev->class >> 8 == PCI_CLASS_DISPLAY_VGA ||
- dev->class >> 8 == PCI_CLASS_DISPLAY_XGA)
- {
- /*
- * All of these (may) have I/O scattered all around
- * and may not use i/o-base address registers at all.
- * So we just have to always enable I/O to these
- * devices.
- */
- cmd |= PCI_COMMAND_IO;
- }
-
- pci_write_config_word(dev, PCI_COMMAND, cmd | PCI_COMMAND_MASTER);
-
- pci_write_config_byte(dev, PCI_LATENCY_TIMER, (disable_pci_burst) ? 0 : 32);
-
- if (bus_info != NULL)
- bus_info->conf_device(dev); /* Machine dependent configuration. */
-
- DBG_DEVS(("layout_dev: bus %d slot 0x%x VID 0x%x DID 0x%x class 0x%x\n",
- dev->bus->number, PCI_SLOT(dev->devfn), dev->vendor, dev->device, dev->class));
-}
-
-/*
- * static void layout_bus(struct pci_bus *bus)
- *
- * Layout memory and I/O for all devices on the given bus.
- *
- * Parameters:
- *
- * bus - bus.
- */
-
-static void __init layout_bus(struct pci_bus *bus)
-{
- unsigned int bio, bmem;
- struct pci_dev *dev;
-
- DBG_DEVS(("layout_bus: starting bus %d\n", bus->number));
-
- if (!bus->devices && !bus->children)
- return;
-
- /*
- * Align the current bases on appropriate boundaries (4K for
- * IO and 1MB for memory).
- */
-
- bio = io_base = ALIGN(io_base, 4*KB);
- bmem = mem_base = ALIGN(mem_base, 1*MB);
-
- /*
- * PCI devices might have been setup by a PCI BIOS emulation
- * running under TOS. In these cases there is a
- * window during which two devices may have an overlapping
- * address range. To avoid this causing trouble, we first
- * turn off the I/O and memory address decoders for all PCI
- * devices. They'll be re-enabled only once all address
- * decoders are programmed consistently.
- */
-
- DBG_DEVS(("layout_bus: disable_dev for bus %d\n", bus->number));
-
- for (dev = bus->devices; dev; dev = dev->sibling)
- {
- if ((dev->class >> 16 != PCI_BASE_CLASS_BRIDGE) ||
- (dev->class >> 8 == PCI_CLASS_BRIDGE_PCMCIA))
- disable_dev(dev);
- }
-
- /*
- * Allocate space to each device:
- */
-
- DBG_DEVS(("layout_bus: starting bus %d devices\n", bus->number));
-
- for (dev = bus->devices; dev; dev = dev->sibling)
- {
- if ((dev->class >> 16 != PCI_BASE_CLASS_BRIDGE) ||
- (dev->class >> 8 == PCI_CLASS_BRIDGE_PCMCIA))
- layout_dev(dev);
- }
-
- DBG_DEVS(("layout_bus: bus %d finished\n", bus->number));
-}
-
-/*
- * static void pcibios_fixup(void)
- *
- * Layout memory and I/O of all devices on the PCI bus if 'pci_modify' is
- * true. This might be necessary because not every m68k machine with a PCI
- * bus has a PCI BIOS. This function should be called right after
- * pci_scan_bus() in pcibios_init().
- */
-
-static void __init pcibios_fixup(void)
-{
- if (pci_modify)
- {
- /*
- * Set base addresses for allocation of I/O and memory space.
- */
-
- io_base = bus_info->io_space.start + IO_ALLOC_OFFSET;
- mem_base = bus_info->mem_space.start + MEM_ALLOC_OFFSET;
-
- /*
- * Scan the tree, allocating PCI memory and I/O space.
- */
-
- layout_bus(pci_bus_b(pci_root.next));
- }
-
- /*
- * Fix interrupt assignments, etc.
- */
-
- bus_info->fixup(pci_modify);
-}
-
-/*
- * static void pcibios_claim_resources(struct pci_bus *bus)
- *
- * Claim all resources that are assigned to devices on the given bus.
- *
- * Parameters:
- *
- * bus - bus.
- */
-
-static void __init pcibios_claim_resources(struct pci_bus *bus)
-{
- struct pci_dev *dev;
- int i;
-
- while (bus)
- {
- for (dev = bus->devices; (dev != NULL); dev = dev->sibling)
- {
- for (i = 0; i < PCI_NUM_RESOURCES; i++)
- {
- struct resource *r = &dev->resource[i];
- struct resource *pr;
- struct pci_bus_info *bus_info = (struct pci_bus_info *) dev->sysdata;
-
- if ((r->start == 0) || (r->parent != NULL))
- continue;
-#if 1
- if (r->flags & IORESOURCE_IO)
- pr = &bus_info->io_space;
- else
- pr = &bus_info->mem_space;
-#else
- if (r->flags & IORESOURCE_IO)
- pr = &ioport_resource;
- else
- pr = &iomem_resource;
-#endif
- if (request_resource(pr, r) < 0)
- {
- printk(KERN_ERR "PCI: Address space collision on region %d of device %s\n", i, dev->name);
- }
- }
- }
-
- if (bus->children)
- pcibios_claim_resources(bus->children);
-
- bus = bus->next;
- }
-}
-
-/*
- * int pcibios_assign_resource(struct pci_dev *dev, int i)
- *
- * Assign a new address to a PCI resource.
- *
- * Parameters:
- *
- * dev - device.
- * i - resource.
- *
- * Result: 0 if successful.
- */
-
-int __init pcibios_assign_resource(struct pci_dev *dev, int i)
-{
- struct resource *r = &dev->resource[i];
- struct resource *pr = pci_find_parent_resource(dev, r);
- unsigned long size = r->end + 1;
-
- if (!pr)
- return -EINVAL;
-
- if (r->flags & IORESOURCE_IO)
- {
- if (size > 0x100)
- return -EFBIG;
-
- if (allocate_resource(pr, r, size, bus_info->io_space.start +
- IO_ALLOC_OFFSET, bus_info->io_space.end, 1024))
- return -EBUSY;
- }
- else
- {
- if (allocate_resource(pr, r, size, bus_info->mem_space.start +
- MEM_ALLOC_OFFSET, bus_info->mem_space.end, size))
- return -EBUSY;
- }
-
- if (i < 6)
- pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + 4 * i, r->start);
-
- return 0;
-}
-
-void __init pcibios_fixup_bus(struct pci_bus *bus)
-{
- struct pci_dev *dev;
- void *sysdata;
-
- sysdata = (bus->parent) ? bus->parent->sysdata : bus->sysdata;
-
- for (dev = bus->devices; (dev != NULL); dev = dev->sibling)
- dev->sysdata = sysdata;
-}
-
-void __init pcibios_init(void)
-{
- printk("Linux/m68k PCI BIOS32 revision %x.%02x\n", MAJOR_REV, MINOR_REV);
-
- bus_info = NULL;
-
-/* Hades code was:
- if (MACH_IS_HADES)
- bus_info = init_hades_pci();
-*/
-
- if (bus_info != NULL)
- {
- printk("PCI: Probing PCI hardware\n");
- pci_scan_bus(0, bus_info->m68k_pci_ops, bus_info);
- pcibios_fixup();
- pcibios_claim_resources(pci_root);
- }
- else
- printk("PCI: No PCI bus detected\n");
-}
-
-char * __init pcibios_setup(char *str)
-{
- if (!strcmp(str, "nomodify"))
- {
- pci_modify = 0;
- return NULL;
- }
- else if (!strcmp(str, "skipvga"))
- {
- skip_vga = 1;
- return NULL;
- }
- else if (!strcmp(str, "noburst"))
- {
- disable_pci_burst = 1;
- return NULL;
- }
-
- return str;
-}
-#endif /* CONFIG_PCI */
--- a/include/asm-m68k/dma.h
+++ b/include/asm-m68k/dma.h
@@ -11,10 +11,6 @@
extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */
extern void free_dma(unsigned int dmanr); /* release it again */

-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
#define isa_dma_bridge_buggy (0)
-#endif

#endif /* _M68K_DMA_H */
--- a/include/asm-m68k/io.h
+++ b/include/asm-m68k/io.h
@@ -7,15 +7,12 @@
* - added skeleton for GG-II and Amiga PCMCIA
* 2/3/01 RZ: - moved a few more defs into raw_io.h
*
- * inX/outX/readX/writeX should not be used by any driver unless it does
- * ISA or PCI access. Other drivers should use function defined in raw_io.h
+ * inX/outX should not be used by any driver unless it does
+ * ISA access. Other drivers should use function defined in raw_io.h
* or define its own macros on top of these.
*
- * inX(),outX() are for PCI and ISA I/O
- * readX(),writeX() are for PCI memory
+ * inX(),outX() are for ISA I/O
* isa_readX(),isa_writeX() are for ISA memory
- *
- * moved mem{cpy,set}_*io inside CONFIG_PCI
*/

#ifndef _IO_H
@@ -256,10 +253,7 @@ static inline void isa_delay(void)
(ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) : \
raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))

-#endif /* CONFIG_ISA */
-

-#if defined(CONFIG_ISA) && !defined(CONFIG_PCI)
#define inb isa_inb
#define inb_p isa_inb_p
#define outb isa_outb
@@ -282,55 +276,9 @@ static inline void isa_delay(void)
#define readw isa_readw
#define writeb isa_writeb
#define writew isa_writew
-#endif /* CONFIG_ISA */

-#if defined(CONFIG_PCI)
+#else /* CONFIG_ISA */

-#define readl(addr) in_le32(addr)
-#define writel(val,addr) out_le32((addr),(val))
-
-/* those can be defined for both ISA and PCI - it won't work though */
-#define readb(addr) in_8(addr)
-#define readw(addr) in_le16(addr)
-#define writeb(val,addr) out_8((addr),(val))
-#define writew(val,addr) out_le16((addr),(val))
-
-#define readb_relaxed(addr) readb(addr)
-#define readw_relaxed(addr) readw(addr)
-#define readl_relaxed(addr) readl(addr)
-
-#ifndef CONFIG_ISA
-#define inb(port) in_8(port)
-#define outb(val,port) out_8((port),(val))
-#define inw(port) in_le16(port)
-#define outw(val,port) out_le16((port),(val))
-#define inl(port) in_le32(port)
-#define outl(val,port) out_le32((port),(val))
-
-#else
-/*
- * kernel with both ISA and PCI compiled in, those have
- * conflicting defs for in/out. Simply consider port < 1024
- * ISA and everything else PCI. read,write not defined
- * in this case
- */
-#define inb(port) ((port)<1024 ? isa_inb(port) : in_8(port))
-#define inb_p(port) ((port)<1024 ? isa_inb_p(port) : in_8(port))
-#define inw(port) ((port)<1024 ? isa_inw(port) : in_le16(port))
-#define inw_p(port) ((port)<1024 ? isa_inw_p(port) : in_le16(port))
-#define inl(port) ((port)<1024 ? isa_inl(port) : in_le32(port))
-#define inl_p(port) ((port)<1024 ? isa_inl_p(port) : in_le32(port))
-
-#define outb(val,port) ((port)<1024 ? isa_outb((val),(port)) : out_8((port),(val)))
-#define outb_p(val,port) ((port)<1024 ? isa_outb_p((val),(port)) : out_8((port),(val)))
-#define outw(val,port) ((port)<1024 ? isa_outw((val),(port)) : out_le16((port),(val)))
-#define outw_p(val,port) ((port)<1024 ? isa_outw_p((val),(port)) : out_le16((port),(val)))
-#define outl(val,port) ((port)<1024 ? isa_outl((val),(port)) : out_le32((port),(val)))
-#define outl_p(val,port) ((port)<1024 ? isa_outl_p((val),(port)) : out_le32((port),(val)))
-#endif
-#endif /* CONFIG_PCI */
-
-#if !defined(CONFIG_ISA) && !defined(CONFIG_PCI)
/*
* We need to define dummy functions for GENERIC_IOMAP support.
*/
@@ -357,11 +305,11 @@ static inline void isa_delay(void)
#define writeb(val,addr) out_8((addr),(val))
#define readw(addr) in_le16(addr)
#define writew(val,addr) out_le16((addr),(val))
-#endif
-#if !defined(CONFIG_PCI)
+
+#endif /* CONFIG_ISA */
+
#define readl(addr) in_le32(addr)
#define writel(val,addr) out_le32((addr),(val))
-#endif

#define mmiowb()

--- a/include/asm-m68k/pci.h
+++ b/include/asm-m68k/pci.h
@@ -1,54 +1,8 @@
#ifndef _ASM_M68K_PCI_H
#define _ASM_M68K_PCI_H

-/*
- * asm-m68k/pci_m68k.h - m68k specific PCI declarations.
- *
- * Written by Wout Klaren.
- */
-
-#include <asm/scatterlist.h>
#include <asm-generic/pci-dma-compat.h>

-struct pci_ops;
-
-/*
- * Structure with hardware dependent information and functions of the
- * PCI bus.
- */
-
-struct pci_bus_info
-{
- /*
- * Resources of the PCI bus.
- */
-
- struct resource mem_space;
- struct resource io_space;
-
- /*
- * System dependent functions.
- */
-
- struct pci_ops *m68k_pci_ops;
-
- void (*fixup)(int pci_modify);
- void (*conf_device)(struct pci_dev *dev);
-};
-
-#define pcibios_assign_all_busses() 0
-#define pcibios_scan_all_fns(a, b) 0
-
-static inline void pcibios_set_master(struct pci_dev *dev)
-{
- /* No special bus mastering setup handling */
-}
-
-static inline void pcibios_penalize_isa_irq(int irq, int active)
-{
- /* We don't do dynamic PCI IRQ allocation */
-}
-
/* The PCI address space does equal the physical memory
* address space. The networking and block device layers use
* this boolean for bounce buffer decisions.
--
Gr{oetje,eeting}s,
Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds



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