Subject: [PATCH] m68k: remove the dead PCI code From: Adrian Bunk This patch removes the no longer used m68k PCI code. Signed-off-by: Adrian Bunk Signed-off-by: Geert Uytterhoeven --- 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 @@ -124,10 +124,6 @@ config ATARI this kernel on an Atari, say Y here and browse the material available in ; 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 -#include - -#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 -#include -#include - -#include -#include -#include - -#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 #include -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.