diff options
Diffstat (limited to 'arch/frv/mb93090-mb00')
| -rw-r--r-- | arch/frv/mb93090-mb00/Makefile | 16 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/flash.c | 90 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-dma-nommu.c | 176 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-dma.c | 118 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-frv.c | 193 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-frv.h | 33 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-irq.c | 62 | ||||
| -rw-r--r-- | arch/frv/mb93090-mb00/pci-vdk.c | 419 |
8 files changed, 0 insertions, 1107 deletions
diff --git a/arch/frv/mb93090-mb00/Makefile b/arch/frv/mb93090-mb00/Makefile deleted file mode 100644 index bcb03ebb3583..000000000000 --- a/arch/frv/mb93090-mb00/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for the MB93090-MB00 motherboard stuff -# - -ifeq "$(CONFIG_PCI)" "y" -obj-y := pci-frv.o pci-irq.o pci-vdk.o - -ifeq "$(CONFIG_MMU)" "y" -obj-y += pci-dma.o -else -obj-y += pci-dma-nommu.o -endif -endif - -obj-$(CONFIG_MTD) += flash.o diff --git a/arch/frv/mb93090-mb00/flash.c b/arch/frv/mb93090-mb00/flash.c deleted file mode 100644 index e1cf802d1639..000000000000 --- a/arch/frv/mb93090-mb00/flash.c +++ /dev/null @@ -1,90 +0,0 @@ -/* Flash mappings for the MB93090-MB00 motherboard - * - * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ - -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/mtd/partitions.h> -#include <linux/mtd/physmap.h> - -#define MB93090_BOOTROM_ADDR 0xFF000000 /* Boot ROM */ -#define MB93090_BOOTROM_SIZE (2 * 1024 * 1024) -#define MB93090_USERROM_ADDR 0xFF200000 /* User ROM */ -#define MB93090_USERROM_SIZE (2 * 1024 * 1024) - -/* - * default MTD partition table for both main flash devices, expected to be - * overridden by RedBoot - */ -static struct mtd_partition mb93090_partitions[] = { - { - .name = "Filesystem", - .size = MTDPART_SIZ_FULL, - .offset = 0, - } -}; - -/* - * Definition of the MB93090 Boot ROM (on the CPU card) - */ -static struct physmap_flash_data mb93090_bootrom_data = { - .width = 2, - .nr_parts = 2, - .parts = mb93090_partitions, -}; - -static struct resource mb93090_bootrom_resource = { - .start = MB93090_BOOTROM_ADDR, - .end = MB93090_BOOTROM_ADDR + MB93090_BOOTROM_SIZE - 1, - .flags = IORESOURCE_MEM, -}; - -static struct platform_device mb93090_bootrom = { - .name = "physmap-flash", - .id = 0, - .dev.platform_data = &mb93090_bootrom_data, - .num_resources = 1, - .resource = &mb93090_bootrom_resource, -}; - -/* - * Definition of the MB93090 User ROM definition (on the motherboard) - */ -static struct physmap_flash_data mb93090_userrom_data = { - .width = 2, - .nr_parts = 2, - .parts = mb93090_partitions, -}; - -static struct resource mb93090_userrom_resource = { - .start = MB93090_USERROM_ADDR, - .end = MB93090_USERROM_ADDR + MB93090_USERROM_SIZE - 1, - .flags = IORESOURCE_MEM, -}; - -static struct platform_device mb93090_userrom = { - .name = "physmap-flash", - .id = 1, - .dev.platform_data = &mb93090_userrom_data, - .num_resources = 1, - .resource = &mb93090_userrom_resource, -}; - -/* - * register the MB93090 flashes - */ -static int __init mb93090_mtd_init(void) -{ - platform_device_register(&mb93090_bootrom); - platform_device_register(&mb93090_userrom); - return 0; -} - -module_init(mb93090_mtd_init); diff --git a/arch/frv/mb93090-mb00/pci-dma-nommu.c b/arch/frv/mb93090-mb00/pci-dma-nommu.c deleted file mode 100644 index 4a96de7f0af4..000000000000 --- a/arch/frv/mb93090-mb00/pci-dma-nommu.c +++ /dev/null @@ -1,176 +0,0 @@ -/* pci-dma-nommu.c: Dynamic DMA mapping support for the FRV - * - * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. - * Written by David Woodhouse (dwmw2@infradead.org) - * - * 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. - */ - -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/export.h> -#include <linux/dma-mapping.h> -#include <linux/list.h> -#include <linux/pci.h> -#include <asm/io.h> - -#if 1 -#define DMA_SRAM_START dma_coherent_mem_start -#define DMA_SRAM_END dma_coherent_mem_end -#else // Use video RAM on Matrox -#define DMA_SRAM_START 0xe8900000 -#define DMA_SRAM_END 0xe8a00000 -#endif - -struct dma_alloc_record { - struct list_head list; - unsigned long ofs; - unsigned long len; -}; - -static DEFINE_SPINLOCK(dma_alloc_lock); -static LIST_HEAD(dma_alloc_list); - -static void *frv_dma_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, - gfp_t gfp, unsigned long attrs) -{ - struct dma_alloc_record *new; - struct list_head *this = &dma_alloc_list; - unsigned long flags; - unsigned long start = DMA_SRAM_START; - unsigned long end; - - if (!DMA_SRAM_START) { - printk("%s called without any DMA area reserved!\n", __func__); - return NULL; - } - - new = kmalloc(sizeof (*new), GFP_ATOMIC); - if (!new) - return NULL; - - /* Round up to a reasonable alignment */ - new->len = (size + 31) & ~31; - - spin_lock_irqsave(&dma_alloc_lock, flags); - - list_for_each (this, &dma_alloc_list) { - struct dma_alloc_record *this_r = list_entry(this, struct dma_alloc_record, list); - end = this_r->ofs; - - if (end - start >= size) - goto gotone; - - start = this_r->ofs + this_r->len; - } - /* Reached end of list. */ - end = DMA_SRAM_END; - this = &dma_alloc_list; - - if (end - start >= size) { - gotone: - new->ofs = start; - list_add_tail(&new->list, this); - spin_unlock_irqrestore(&dma_alloc_lock, flags); - - *dma_handle = start; - return (void *)start; - } - - kfree(new); - spin_unlock_irqrestore(&dma_alloc_lock, flags); - return NULL; -} - -static void frv_dma_free(struct device *hwdev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - struct dma_alloc_record *rec; - unsigned long flags; - - spin_lock_irqsave(&dma_alloc_lock, flags); - - list_for_each_entry(rec, &dma_alloc_list, list) { - if (rec->ofs == dma_handle) { - list_del(&rec->list); - kfree(rec); - spin_unlock_irqrestore(&dma_alloc_lock, flags); - return; - } - } - spin_unlock_irqrestore(&dma_alloc_lock, flags); - BUG(); -} - -static int frv_dma_map_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - struct scatterlist *sg; - int i; - - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return nents; - - for_each_sg(sglist, sg, nents, i) { - frv_cache_wback_inv(sg_dma_address(sg), - sg_dma_address(sg) + sg_dma_len(sg)); - } - - return nents; -} - -static dma_addr_t frv_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - BUG_ON(direction == DMA_NONE); - - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - flush_dcache_page(page); - - return (dma_addr_t) page_to_phys(page) + offset; -} - -static void frv_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - flush_write_buffers(); -} - -static void frv_dma_sync_sg_for_device(struct device *dev, - struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - flush_write_buffers(); -} - - -static int frv_dma_supported(struct device *dev, u64 mask) -{ - /* - * we fall back to GFP_DMA when the mask isn't all 1s, - * so we can't guarantee allocations that must be - * within a tighter range than GFP_DMA.. - */ - if (mask < 0x00ffffff) - return 0; - return 1; -} - -const struct dma_map_ops frv_dma_ops = { - .alloc = frv_dma_alloc, - .free = frv_dma_free, - .map_page = frv_dma_map_page, - .map_sg = frv_dma_map_sg, - .sync_single_for_device = frv_dma_sync_single_for_device, - .sync_sg_for_device = frv_dma_sync_sg_for_device, - .dma_supported = frv_dma_supported, -}; -EXPORT_SYMBOL(frv_dma_ops); diff --git a/arch/frv/mb93090-mb00/pci-dma.c b/arch/frv/mb93090-mb00/pci-dma.c deleted file mode 100644 index e7130abc0dae..000000000000 --- a/arch/frv/mb93090-mb00/pci-dma.c +++ /dev/null @@ -1,118 +0,0 @@ -/* pci-dma.c: Dynamic DMA mapping support for the FRV CPUs that have MMUs - * - * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * 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. - */ - -#include <linux/types.h> -#include <linux/dma-mapping.h> -#include <linux/list.h> -#include <linux/pci.h> -#include <linux/export.h> -#include <linux/highmem.h> -#include <linux/scatterlist.h> -#include <asm/io.h> - -static void *frv_dma_alloc(struct device *hwdev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) -{ - void *ret; - - ret = consistent_alloc(gfp, size, dma_handle); - if (ret) - memset(ret, 0, size); - - return ret; -} - -static void frv_dma_free(struct device *hwdev, size_t size, void *vaddr, - dma_addr_t dma_handle, unsigned long attrs) -{ - consistent_free(vaddr); -} - -static int frv_dma_map_sg(struct device *dev, struct scatterlist *sglist, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - struct scatterlist *sg; - unsigned long dampr2; - void *vaddr; - int i; - - BUG_ON(direction == DMA_NONE); - - if (attrs & DMA_ATTR_SKIP_CPU_SYNC) - return nents; - - dampr2 = __get_DAMPR(2); - - for_each_sg(sglist, sg, nents, i) { - vaddr = kmap_atomic_primary(sg_page(sg)); - - frv_dcache_writeback((unsigned long) vaddr, - (unsigned long) vaddr + PAGE_SIZE); - - } - - kunmap_atomic_primary(vaddr); - if (dampr2) { - __set_DAMPR(2, dampr2); - __set_IAMPR(2, dampr2); - } - - return nents; -} - -static dma_addr_t frv_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction, unsigned long attrs) -{ - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC)) - flush_dcache_page(page); - - return (dma_addr_t) page_to_phys(page) + offset; -} - -static void frv_dma_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - flush_write_buffers(); -} - -static void frv_dma_sync_sg_for_device(struct device *dev, - struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - flush_write_buffers(); -} - - -static int frv_dma_supported(struct device *dev, u64 mask) -{ - /* - * we fall back to GFP_DMA when the mask isn't all 1s, - * so we can't guarantee allocations that must be - * within a tighter range than GFP_DMA.. - */ - if (mask < 0x00ffffff) - return 0; - return 1; -} - -const struct dma_map_ops frv_dma_ops = { - .alloc = frv_dma_alloc, - .free = frv_dma_free, - .map_page = frv_dma_map_page, - .map_sg = frv_dma_map_sg, - .sync_single_for_device = frv_dma_sync_single_for_device, - .sync_sg_for_device = frv_dma_sync_sg_for_device, - .dma_supported = frv_dma_supported, -}; -EXPORT_SYMBOL(frv_dma_ops); diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c deleted file mode 100644 index c452ddb5620f..000000000000 --- a/arch/frv/mb93090-mb00/pci-frv.c +++ /dev/null @@ -1,193 +0,0 @@ -/* pci-frv.c: low-level PCI access routines - * - * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - Derived from the i386 equivalent stuff - * - * 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. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/errno.h> - -#include "pci-frv.h" - -/* - * We need to avoid collisions with `mirrored' VGA ports - * and other strange ISA hardware, so we always want the - * addresses to be allocated in the 0x000-0x0ff region - * modulo 0x400. - * - * Why? Because some silly external IO cards only decode - * the low 10 bits of the IO address. The 0x00-0xff region - * is reserved for motherboard devices that decode all 16 - * bits, so it's ok to allocate at, say, 0x2800-0x28ff, - * but we want to try to avoid allocating at 0x2900-0x2bff - * which might have be mirrored at 0x0100-0x03ff.. - */ -resource_size_t -pcibios_align_resource(void *data, const struct resource *res, - resource_size_t size, resource_size_t align) -{ - resource_size_t start = res->start; - - if ((res->flags & IORESOURCE_IO) && (start & 0x300)) - start = (start + 0x3ff) & ~0x3ff; - - return start; -} - - -/* - * Handle resources of PCI devices. If the world were perfect, we could - * just allocate all the resource regions and do nothing more. It isn't. - * On the other hand, we cannot just re-allocate all devices, as it would - * require us to know lots of host bridge internals. So we attempt to - * keep as much of the original configuration as possible, but tweak it - * when it's found to be wrong. - * - * Known BIOS problems we have to work around: - * - I/O or memory regions not configured - * - regions configured, but not enabled in the command register - * - bogus I/O addresses above 64K used - * - expansion ROMs left enabled (this may sound harmless, but given - * the fact the PCI specs explicitly allow address decoders to be - * shared between expansion ROMs and other resource regions, it's - * at least dangerous) - * - * Our solution: - * (1) Allocate resources for all buses behind PCI-to-PCI bridges. - * This gives us fixed barriers on where we can allocate. - * (2) Allocate resources for all enabled devices. If there is - * a collision, just mark the resource as unallocated. Also - * disable expansion ROMs during this step. - * (3) Try to allocate resources for disabled devices. If the - * resources were assigned correctly, everything goes well, - * if they weren't, they won't disturb allocation of other - * resources. - * (4) Assign new addresses to resources which were either - * not configured at all or misconfigured. If explicitly - * requested by the user, configure expansion ROM address - * as well. - */ - -static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) -{ - struct list_head *ln; - struct pci_bus *bus; - struct pci_dev *dev; - int idx; - struct resource *r; - - /* Depth-First Search on bus tree */ - for (ln=bus_list->next; ln != bus_list; ln=ln->next) { - bus = list_entry(ln, struct pci_bus, node); - if ((dev = bus->self)) { - for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) { - r = &dev->resource[idx]; - if (!r->start) - continue; - pci_claim_bridge_resource(dev, idx); - } - } - pcibios_allocate_bus_resources(&bus->children); - } -} - -static void __init pcibios_allocate_resources(int pass) -{ - struct pci_dev *dev = NULL; - int idx, disabled; - u16 command; - struct resource *r; - - for_each_pci_dev(dev) { - pci_read_config_word(dev, PCI_COMMAND, &command); - for(idx = 0; idx < 6; idx++) { - r = &dev->resource[idx]; - if (r->parent) /* Already allocated */ - continue; - if (!r->start) /* Address not assigned at all */ - continue; - if (r->flags & IORESOURCE_IO) - disabled = !(command & PCI_COMMAND_IO); - else - disabled = !(command & PCI_COMMAND_MEMORY); - if (pass == disabled) { - DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n", - r->start, r->end, r->flags, disabled, pass); - if (pci_claim_resource(dev, idx) < 0) { - /* We'll assign a new address later */ - r->end -= r->start; - r->start = 0; - } - } - } - if (!pass) { - r = &dev->resource[PCI_ROM_RESOURCE]; - if (r->flags & IORESOURCE_ROM_ENABLE) { - /* Turn the ROM off, leave the resource region, but keep it unregistered. */ - u32 reg; - DBG("PCI: Switching off ROM of %s\n", pci_name(dev)); - r->flags &= ~IORESOURCE_ROM_ENABLE; - pci_read_config_dword(dev, dev->rom_base_reg, ®); - pci_write_config_dword(dev, dev->rom_base_reg, reg & ~PCI_ROM_ADDRESS_ENABLE); - } - } - } -} - -static void __init pcibios_assign_resources(void) -{ - struct pci_dev *dev = NULL; - int idx, err; - struct resource *r; - - for_each_pci_dev(dev) { - int class = dev->class >> 8; - - /* Don't touch classless devices and host bridges */ - if (!class || class == PCI_CLASS_BRIDGE_HOST) - continue; - - for(idx=0; idx<6; idx++) { - r = &dev->resource[idx]; - - /* - * Don't touch IDE controllers and I/O ports of video cards! - */ - if ((class == PCI_CLASS_STORAGE_IDE && idx < 4) || - (class == PCI_CLASS_DISPLAY_VGA && (r->flags & IORESOURCE_IO))) - continue; - - /* - * We shall assign a new address to this resource, either because - * the BIOS forgot to do so or because we have decided the old - * address was unusable for some reason. - */ - if (!r->start && r->end) { - err = pci_assign_resource(dev, idx); - if (err) - dev_err(&dev->dev, - "Failed to assign new address to %d\n", - idx); - } - } - } -} - -void __init pcibios_resource_survey(void) -{ - DBG("PCI: Allocating resources\n"); - pcibios_allocate_bus_resources(&pci_root_buses); - pcibios_allocate_resources(0); - pcibios_allocate_resources(1); - pcibios_assign_resources(); -} diff --git a/arch/frv/mb93090-mb00/pci-frv.h b/arch/frv/mb93090-mb00/pci-frv.h deleted file mode 100644 index 41fbb6bae558..000000000000 --- a/arch/frv/mb93090-mb00/pci-frv.h +++ /dev/null @@ -1,33 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Low-Level PCI Access for FRV machines. - * - * (c) 1999 Martin Mares <mj@ucw.cz> - */ - -#include <asm/sections.h> - -#undef DEBUG - -#ifdef DEBUG -#define DBG(x...) printk(x) -#else -#define DBG(x...) -#endif - -extern unsigned int __nongpreldata pci_probe; - -/* pci-frv.c */ - -void pcibios_resource_survey(void); - -/* pci-vdk.c */ - -extern struct pci_ops *__nongpreldata pci_root_ops; - -/* pci-irq.c */ -extern unsigned int pcibios_irq_mask; - -void pcibios_irq_init(void); -void pcibios_fixup_irqs(void); -void pcibios_enable_irq(struct pci_dev *dev); diff --git a/arch/frv/mb93090-mb00/pci-irq.c b/arch/frv/mb93090-mb00/pci-irq.c deleted file mode 100644 index a40aa8663056..000000000000 --- a/arch/frv/mb93090-mb00/pci-irq.c +++ /dev/null @@ -1,62 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* pci-irq.c: PCI IRQ routing on the FRV motherboard - * - * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * derived from: arch/i386/kernel/pci-irq.c: (c) 1999--2000 Martin Mares <mj@suse.cz> - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/irq.h> - -#include <asm/io.h> -#include <asm/smp.h> - -#include "pci-frv.h" - -/* - * DEVICE DEVNO INT#A INT#B INT#C INT#D - * ======= ======= ======= ======= ======= ======= - * MB86943 0 fpga.10 - - - - * RTL8029 16 fpga.12 - - - - * SLOT 1 19 fpga.6 fpga.5 fpga.4 fpga.3 - * SLOT 2 18 fpga.5 fpga.4 fpga.3 fpga.6 - * SLOT 3 17 fpga.4 fpga.3 fpga.6 fpga.5 - * - */ - -static const uint8_t __initconst pci_bus0_irq_routing[32][4] = { - [0 ] = { IRQ_FPGA_MB86943_PCI_INTA }, - [16] = { IRQ_FPGA_RTL8029_INTA }, - [17] = { IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB }, - [18] = { IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD, IRQ_FPGA_PCI_INTA }, - [19] = { IRQ_FPGA_PCI_INTA, IRQ_FPGA_PCI_INTB, IRQ_FPGA_PCI_INTC, IRQ_FPGA_PCI_INTD }, -}; - -void __init pcibios_irq_init(void) -{ -} - -void __init pcibios_fixup_irqs(void) -{ - struct pci_dev *dev = NULL; - uint8_t line, pin; - - for_each_pci_dev(dev) { - pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); - if (pin) { - dev->irq = pci_bus0_irq_routing[PCI_SLOT(dev->devfn)][pin - 1]; - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); - } - pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); - } -} - -void pcibios_enable_irq(struct pci_dev *dev) -{ - pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); -} diff --git a/arch/frv/mb93090-mb00/pci-vdk.c b/arch/frv/mb93090-mb00/pci-vdk.c deleted file mode 100644 index f211839e2cae..000000000000 --- a/arch/frv/mb93090-mb00/pci-vdk.c +++ /dev/null @@ -1,419 +0,0 @@ -/* pci-vdk.c: MB93090-MB00 (VDK) PCI support - * - * Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * 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. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/delay.h> - -#include <asm/segment.h> -#include <asm/io.h> -#include <asm/mb-regs.h> -#include <asm/mb86943a.h> -#include "pci-frv.h" - -unsigned int __nongpreldata pci_probe = 1; - -struct pci_ops *__nongpreldata pci_root_ops; - -/* - * The accessible PCI window does not cover the entire CPU address space, but - * there are devices we want to access outside of that window, so we need to - * insert specific PCI bus resources instead of using the platform-level bus - * resources directly for the PCI root bus. - * - * These are configured and inserted by pcibios_init() and are attached to the - * root bus by pcibios_fixup_bus(). - */ -static struct resource pci_ioport_resource = { - .name = "PCI IO", - .start = 0, - .end = IO_SPACE_LIMIT, - .flags = IORESOURCE_IO, -}; - -static struct resource pci_iomem_resource = { - .name = "PCI mem", - .start = 0, - .end = -1, - .flags = IORESOURCE_MEM, -}; - -/* - * Functions for accessing PCI configuration space - */ - -#define CONFIG_CMD(bus, dev, where) \ - (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3)) - -#define __set_PciCfgAddr(A) writel((A), (volatile void __iomem *) __region_CS1 + 0x80) - -#define __get_PciCfgDataB(A) readb((volatile void __iomem *) __region_CS1 + 0x88 + ((A) & 3)) -#define __get_PciCfgDataW(A) readw((volatile void __iomem *) __region_CS1 + 0x88 + ((A) & 2)) -#define __get_PciCfgDataL(A) readl((volatile void __iomem *) __region_CS1 + 0x88) - -#define __set_PciCfgDataB(A,V) \ - writeb((V), (volatile void __iomem *) __region_CS1 + 0x88 + (3 - ((A) & 3))) - -#define __set_PciCfgDataW(A,V) \ - writew((V), (volatile void __iomem *) __region_CS1 + 0x88 + (2 - ((A) & 2))) - -#define __set_PciCfgDataL(A,V) \ - writel((V), (volatile void __iomem *) __region_CS1 + 0x88) - -#define __get_PciBridgeDataB(A) readb((volatile void __iomem *) __region_CS1 + 0x800 + (A)) -#define __get_PciBridgeDataW(A) readw((volatile void __iomem *) __region_CS1 + 0x800 + (A)) -#define __get_PciBridgeDataL(A) readl((volatile void __iomem *) __region_CS1 + 0x800 + (A)) - -#define __set_PciBridgeDataB(A,V) writeb((V), (volatile void __iomem *) __region_CS1 + 0x800 + (A)) -#define __set_PciBridgeDataW(A,V) writew((V), (volatile void __iomem *) __region_CS1 + 0x800 + (A)) -#define __set_PciBridgeDataL(A,V) writel((V), (volatile void __iomem *) __region_CS1 + 0x800 + (A)) - -static inline int __query(const struct pci_dev *dev) -{ -// return dev->bus->number==0 && (dev->devfn==PCI_DEVFN(0,0)); -// return dev->bus->number==1; -// return dev->bus->number==0 && -// (dev->devfn==PCI_DEVFN(2,0) || dev->devfn==PCI_DEVFN(3,0)); - return 0; -} - -/*****************************************************************************/ -/* - * - */ -static int pci_frv_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size, - u32 *val) -{ - u32 _value; - - if (bus->number == 0 && devfn == PCI_DEVFN(0, 0)) { - _value = __get_PciBridgeDataL(where & ~3); - } - else { - __set_PciCfgAddr(CONFIG_CMD(bus, devfn, where)); - _value = __get_PciCfgDataL(where & ~3); - } - - switch (size) { - case 1: - _value = _value >> ((where & 3) * 8); - break; - - case 2: - _value = _value >> ((where & 2) * 8); - break; - - case 4: - break; - - default: - BUG(); - } - - *val = _value; - return PCIBIOS_SUCCESSFUL; -} - -static int pci_frv_write_config(struct pci_bus *bus, unsigned int devfn, int where, int size, - u32 value) -{ - switch (size) { - case 1: - if (bus->number == 0 && devfn == PCI_DEVFN(0, 0)) { - __set_PciBridgeDataB(where, value); - } - else { - __set_PciCfgAddr(CONFIG_CMD(bus, devfn, where)); - __set_PciCfgDataB(where, value); - } - break; - - case 2: - if (bus->number == 0 && devfn == PCI_DEVFN(0, 0)) { - __set_PciBridgeDataW(where, value); - } - else { - __set_PciCfgAddr(CONFIG_CMD(bus, devfn, where)); - __set_PciCfgDataW(where, value); - } - break; - - case 4: - if (bus->number == 0 && devfn == PCI_DEVFN(0, 0)) { - __set_PciBridgeDataL(where, value); - } - else { - __set_PciCfgAddr(CONFIG_CMD(bus, devfn, where)); - __set_PciCfgDataL(where, value); - } - break; - - default: - BUG(); - } - - return PCIBIOS_SUCCESSFUL; -} - -static struct pci_ops pci_direct_frv = { - .read = pci_frv_read_config, - .write = pci_frv_write_config, -}; - -/* - * Before we decide to use direct hardware access mechanisms, we try to do some - * trivial checks to ensure it at least _seems_ to be working -- we just test - * whether bus 00 contains a host bridge (this is similar to checking - * techniques used in XFree86, but ours should be more reliable since we - * attempt to make use of direct access hints provided by the PCI BIOS). - * - * This should be close to trivial, but it isn't, because there are buggy - * chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID. - */ -static int __init pci_sanity_check(struct pci_ops *o) -{ - struct pci_bus bus; /* Fake bus and device */ - u32 id; - - bus.number = 0; - - if (o->read(&bus, 0, PCI_VENDOR_ID, 4, &id) == PCIBIOS_SUCCESSFUL) { - printk("PCI: VDK Bridge device:vendor: %08x\n", id); - if (id == 0x200e10cf) - return 1; - } - - printk("PCI: VDK Bridge: Sanity check failed\n"); - return 0; -} - -static struct pci_ops * __init pci_check_direct(void) -{ - unsigned long flags; - - local_irq_save(flags); - - /* check if access works */ - if (pci_sanity_check(&pci_direct_frv)) { - local_irq_restore(flags); - printk("PCI: Using configuration frv\n"); -// request_mem_region(0xBE040000, 256, "FRV bridge"); -// request_mem_region(0xBFFFFFF4, 12, "PCI frv"); - return &pci_direct_frv; - } - - local_irq_restore(flags); - return NULL; -} - -/* - * Exceptions for specific devices. Usually work-arounds for fatal design flaws. - */ - -static void __init pci_fixup_umc_ide(struct pci_dev *d) -{ - /* - * UM8886BF IDE controller sets region type bits incorrectly, - * therefore they look like memory despite of them being I/O. - */ - int i; - - printk("PCI: Fixing base address flags for device %s\n", pci_name(d)); - for(i=0; i<4; i++) - d->resource[i].flags |= PCI_BASE_ADDRESS_SPACE_IO; -} - -static void pci_fixup_ide_bases(struct pci_dev *d) -{ - int i; - - /* - * PCI IDE controllers use non-standard I/O port decoding, respect it. - */ - if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE) - return; - printk("PCI: IDE base address fixup for %s\n", pci_name(d)); - for(i=0; i<4; i++) { - struct resource *r = &d->resource[i]; - if ((r->start & ~0x80) == 0x374) { - r->start |= 2; - r->end = r->start; - } - } -} - -static void pci_fixup_ide_trash(struct pci_dev *d) -{ - int i; - - /* - * There exist PCI IDE controllers which have utter garbage - * in first four base registers. Ignore that. - */ - printk("PCI: IDE base address trash cleared for %s\n", pci_name(d)); - for(i=0; i<4; i++) - d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0; -} - -static void pci_fixup_latency(struct pci_dev *d) -{ - /* - * SiS 5597 and 5598 chipsets require latency timer set to - * at most 32 to avoid lockups. - */ - DBG("PCI: Setting max latency to 32\n"); - pcibios_max_latency = 32; -} - -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF, pci_fixup_umc_ide); -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash); -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5597, pci_fixup_latency); -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5598, pci_fixup_latency); -DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases); - -/* - * Called after each bus is probed, but before its children - * are examined. - */ - -void pcibios_fixup_bus(struct pci_bus *bus) -{ -#if 0 - printk("### PCIBIOS_FIXUP_BUS(%d)\n",bus->number); -#endif - - pci_read_bridge_bases(bus); - - if (bus->number == 0) { - struct pci_dev *dev; - list_for_each_entry(dev, &bus->devices, bus_list) { - if (dev->devfn == 0) { - dev->resource[0].start = 0; - dev->resource[0].end = 0; - } - } - } -} - -/* - * Initialization. Try all known PCI access methods. Note that we support - * using both PCI BIOS and direct access: in such cases, we use I/O ports - * to access config space, but we still keep BIOS order of cards to be - * compatible with 2.0.X. This should go away some day. - */ - -int __init pcibios_init(void) -{ - struct pci_bus *bus; - struct pci_ops *dir = NULL; - LIST_HEAD(resources); - - if (!mb93090_mb00_detected) - return -ENXIO; - - __reg_MB86943_sl_ctl |= MB86943_SL_CTL_DRCT_MASTER_SWAP | MB86943_SL_CTL_DRCT_SLAVE_SWAP; - - __reg_MB86943_ecs_base(1) = ((__region_CS2 + 0x01000000) >> 9) | 0x08000000; - __reg_MB86943_ecs_base(2) = ((__region_CS2 + 0x00000000) >> 9) | 0x08000000; - - *(volatile uint32_t *) (__region_CS1 + 0x848) = 0xe0000000; - *(volatile uint32_t *) (__region_CS1 + 0x8b8) = 0x00000000; - - __reg_MB86943_sl_pci_io_base = (__region_CS2 + 0x04000000) >> 9; - __reg_MB86943_sl_pci_mem_base = (__region_CS2 + 0x08000000) >> 9; - __reg_MB86943_pci_sl_io_base = __region_CS2 + 0x04000000; - __reg_MB86943_pci_sl_mem_base = __region_CS2 + 0x08000000; - mb(); - - /* enable PCI arbitration */ - __reg_MB86943_pci_arbiter = MB86943_PCIARB_EN; - - pci_ioport_resource.start = (__reg_MB86943_sl_pci_io_base << 9) & 0xfffffc00; - pci_ioport_resource.end = (__reg_MB86943_sl_pci_io_range << 9) | 0x3ff; - pci_ioport_resource.end += pci_ioport_resource.start; - - printk("PCI IO window: %08llx-%08llx\n", - (unsigned long long) pci_ioport_resource.start, - (unsigned long long) pci_ioport_resource.end); - - pci_iomem_resource.start = (__reg_MB86943_sl_pci_mem_base << 9) & 0xfffffc00; - pci_iomem_resource.end = (__reg_MB86943_sl_pci_mem_range << 9) | 0x3ff; - pci_iomem_resource.end += pci_iomem_resource.start; - - /* Reserve somewhere to write to flush posted writes. This is used by - * __flush_PCI_writes() from asm/io.h to force the write FIFO in the - * CPU-PCI bridge to flush as this doesn't happen automatically when a - * read is performed on the MB93090 development kit motherboard. - */ - pci_iomem_resource.start += 0x400; - - printk("PCI MEM window: %08llx-%08llx\n", - (unsigned long long) pci_iomem_resource.start, - (unsigned long long) pci_iomem_resource.end); - printk("PCI DMA memory: %08lx-%08lx\n", - dma_coherent_mem_start, dma_coherent_mem_end); - - if (insert_resource(&iomem_resource, &pci_iomem_resource) < 0) - panic("Unable to insert PCI IOMEM resource\n"); - if (insert_resource(&ioport_resource, &pci_ioport_resource) < 0) - panic("Unable to insert PCI IOPORT resource\n"); - - if (!pci_probe) - return -ENXIO; - - dir = pci_check_direct(); - if (dir) - pci_root_ops = dir; - else { - printk("PCI: No PCI bus detected\n"); - return -ENXIO; - } - - printk("PCI: Probing PCI hardware\n"); - pci_add_resource(&resources, &pci_ioport_resource); - pci_add_resource(&resources, &pci_iomem_resource); - bus = pci_scan_root_bus(NULL, 0, pci_root_ops, NULL, &resources); - - pcibios_irq_init(); - pcibios_fixup_irqs(); - pcibios_resource_survey(); - if (!bus) - return 0; - - pci_bus_add_devices(bus); - return 0; -} - -arch_initcall(pcibios_init); - -char * __init pcibios_setup(char *str) -{ - if (!strcmp(str, "off")) { - pci_probe = 0; - return NULL; - } - return str; -} - -int pcibios_enable_device(struct pci_dev *dev, int mask) -{ - int err; - - if ((err = pci_enable_resources(dev, mask)) < 0) - return err; - if (!dev->msi_enabled) - pcibios_enable_irq(dev); - return 0; -} |