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246 lines
5.7 KiB
246 lines
5.7 KiB
/* |
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* Zorro Bus Services |
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* |
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* Copyright (C) 1995-2003 Geert Uytterhoeven |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/zorro.h> |
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#include <linux/bitops.h> |
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#include <linux/string.h> |
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#include <linux/platform_device.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/slab.h> |
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#include <asm/byteorder.h> |
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#include <asm/setup.h> |
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#include <asm/amigahw.h> |
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#include "zorro.h" |
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/* |
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* Zorro Expansion Devices |
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*/ |
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unsigned int zorro_num_autocon; |
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struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata; |
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struct zorro_dev *zorro_autocon; |
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/* |
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* Zorro bus |
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*/ |
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struct zorro_bus { |
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struct device dev; |
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struct zorro_dev devices[]; |
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}; |
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/* |
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* Find Zorro Devices |
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*/ |
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struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from) |
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{ |
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struct zorro_dev *z; |
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if (!zorro_num_autocon) |
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return NULL; |
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for (z = from ? from+1 : &zorro_autocon[0]; |
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z < zorro_autocon+zorro_num_autocon; |
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z++) |
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if (id == ZORRO_WILDCARD || id == z->id) |
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return z; |
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return NULL; |
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} |
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EXPORT_SYMBOL(zorro_find_device); |
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/* |
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* Bitmask indicating portions of available Zorro II RAM that are unused |
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* by the system. Every bit represents a 64K chunk, for a maximum of 8MB |
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* (128 chunks, physical 0x00200000-0x009fffff). |
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* |
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* If you want to use (= allocate) portions of this RAM, you should clear |
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* the corresponding bits. |
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* |
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* Possible uses: |
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* - z2ram device |
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* - SCSI DMA bounce buffers |
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* |
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* FIXME: use the normal resource management |
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*/ |
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DECLARE_BITMAP(zorro_unused_z2ram, 128); |
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EXPORT_SYMBOL(zorro_unused_z2ram); |
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static void __init mark_region(unsigned long start, unsigned long end, |
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int flag) |
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{ |
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if (flag) |
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start += Z2RAM_CHUNKMASK; |
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else |
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end += Z2RAM_CHUNKMASK; |
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start &= ~Z2RAM_CHUNKMASK; |
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end &= ~Z2RAM_CHUNKMASK; |
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if (end <= Z2RAM_START || start >= Z2RAM_END) |
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return; |
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start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START; |
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end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START; |
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while (start < end) { |
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u32 chunk = start>>Z2RAM_CHUNKSHIFT; |
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if (flag) |
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set_bit(chunk, zorro_unused_z2ram); |
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else |
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clear_bit(chunk, zorro_unused_z2ram); |
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start += Z2RAM_CHUNKSIZE; |
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} |
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} |
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static struct resource __init *zorro_find_parent_resource( |
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struct platform_device *bridge, struct zorro_dev *z) |
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{ |
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int i; |
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for (i = 0; i < bridge->num_resources; i++) { |
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struct resource *r = &bridge->resource[i]; |
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if (zorro_resource_start(z) >= r->start && |
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zorro_resource_end(z) <= r->end) |
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return r; |
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} |
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return &iomem_resource; |
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} |
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static int __init amiga_zorro_probe(struct platform_device *pdev) |
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{ |
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struct zorro_bus *bus; |
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struct zorro_dev_init *zi; |
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struct zorro_dev *z; |
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struct resource *r; |
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unsigned int i; |
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int error; |
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/* Initialize the Zorro bus */ |
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bus = kzalloc(struct_size(bus, devices, zorro_num_autocon), |
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GFP_KERNEL); |
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if (!bus) |
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return -ENOMEM; |
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zorro_autocon = bus->devices; |
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bus->dev.parent = &pdev->dev; |
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dev_set_name(&bus->dev, zorro_bus_type.name); |
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error = device_register(&bus->dev); |
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if (error) { |
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pr_err("Zorro: Error registering zorro_bus\n"); |
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put_device(&bus->dev); |
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kfree(bus); |
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return error; |
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} |
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platform_set_drvdata(pdev, bus); |
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pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n", |
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zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s"); |
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/* First identify all devices ... */ |
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for (i = 0; i < zorro_num_autocon; i++) { |
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zi = &zorro_autocon_init[i]; |
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z = &zorro_autocon[i]; |
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z->rom = zi->rom; |
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z->id = (be16_to_cpu(z->rom.er_Manufacturer) << 16) | |
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(z->rom.er_Product << 8); |
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if (z->id == ZORRO_PROD_GVP_EPC_BASE) { |
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/* GVP quirk */ |
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unsigned long magic = zi->boardaddr + 0x8000; |
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z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK; |
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} |
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z->slotaddr = zi->slotaddr; |
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z->slotsize = zi->slotsize; |
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sprintf(z->name, "Zorro device %08x", z->id); |
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zorro_name_device(z); |
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z->resource.start = zi->boardaddr; |
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z->resource.end = zi->boardaddr + zi->boardsize - 1; |
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z->resource.name = z->name; |
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r = zorro_find_parent_resource(pdev, z); |
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error = request_resource(r, &z->resource); |
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if (error && !(z->rom.er_Type & ERTF_MEMLIST)) |
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dev_err(&bus->dev, |
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"Address space collision on device %s %pR\n", |
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z->name, &z->resource); |
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z->dev.parent = &bus->dev; |
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z->dev.bus = &zorro_bus_type; |
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z->dev.id = i; |
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switch (z->rom.er_Type & ERT_TYPEMASK) { |
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case ERT_ZORROIII: |
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z->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
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break; |
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case ERT_ZORROII: |
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default: |
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z->dev.coherent_dma_mask = DMA_BIT_MASK(24); |
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break; |
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} |
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z->dev.dma_mask = &z->dev.coherent_dma_mask; |
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} |
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/* ... then register them */ |
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for (i = 0; i < zorro_num_autocon; i++) { |
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z = &zorro_autocon[i]; |
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error = device_register(&z->dev); |
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if (error) { |
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dev_err(&bus->dev, "Error registering device %s\n", |
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z->name); |
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put_device(&z->dev); |
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continue; |
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} |
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} |
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/* Mark all available Zorro II memory */ |
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zorro_for_each_dev(z) { |
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if (z->rom.er_Type & ERTF_MEMLIST) |
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mark_region(zorro_resource_start(z), |
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zorro_resource_end(z)+1, 1); |
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} |
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/* Unmark all used Zorro II memory */ |
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for (i = 0; i < m68k_num_memory; i++) |
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if (m68k_memory[i].addr < 16*1024*1024) |
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mark_region(m68k_memory[i].addr, |
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m68k_memory[i].addr+m68k_memory[i].size, |
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0); |
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return 0; |
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} |
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static struct platform_driver amiga_zorro_driver = { |
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.driver = { |
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.name = "amiga-zorro", |
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}, |
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}; |
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static int __init amiga_zorro_init(void) |
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{ |
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return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe); |
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} |
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module_init(amiga_zorro_init); |
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MODULE_LICENSE("GPL");
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