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