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/*
* $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $
*
* Zorro Bus Services
*
* Copyright (C) 1995-1998 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/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/zorro.h>
#include <asm/setup.h>
#include <asm/bitops.h>
#include <asm/amigahw.h>
/*
* Expansion Devices
*/
u_int zorro_num_autocon = 0;
struct ConfigDev zorro_autocon[ZORRO_NUM_AUTO];
static u32 zorro_autocon_parts[ZORRO_NUM_AUTO] = { 0, };
/*
* Find the key for the next unconfigured expansion device of a specific
* type.
*
* Part is a device specific number (0 <= part <= 31) to allow for the
* independent configuration of independent parts of an expansion board.
* Thanks to Jes Soerensen for this idea!
*
* Index is used to specify the first board in the autocon list
* to be tested. It was inserted in order to solve the problem
* with the GVP boards that use the same product code, but
* it should help if there are other companies which use the same
* method as GVP. Drivers for boards which are not using this
* method do not need to think of this - just set index = 0.
*
* Example:
*
* while ((key = zorro_find(ZORRO_PROD_MY_BOARD, MY_PART, 0))) {
* cd = zorro_get_board(key);
* initialise_this_board;
* zorro_config_board(key, MY_PART);
* }
*/
u_int zorro_find(zorro_id id, u_int part, u_int index)
{
u16 manuf = ZORRO_MANUF(id);
u8 prod = ZORRO_PROD(id);
u8 epc = ZORRO_EPC(id);
u_int key;
const struct ConfigDev *cd;
u32 addr;
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))
return 0;
if (part > 31) {
printk("zorro_find: bad part %d\n", part);
return 0;
}
for (key = index+1; key <= zorro_num_autocon; key++) {
cd = &zorro_autocon[key-1];
addr = (u32)cd->cd_BoardAddr;
if ((cd->cd_Rom.er_Manufacturer == manuf) &&
(cd->cd_Rom.er_Product == prod) &&
!(zorro_autocon_parts[key-1] & (1<<part)) &&
(manuf != ZORRO_MANUF(ZORRO_PROD_GVP_EPC_BASE) ||
prod != ZORRO_PROD(ZORRO_PROD_GVP_EPC_BASE) || /* GVP quirk */
(*(u16 *)ZTWO_VADDR(addr+0x8000) & GVP_PRODMASK) == epc))
return key;
}
return 0;
}
/*
* Get the board corresponding to a specific key
*/
const struct ConfigDev *zorro_get_board(u_int key)
{
if ((key < 1) || (key > zorro_num_autocon)) {
printk("zorro_get_board: bad key %d\n", key);
return NULL;
}
return &zorro_autocon[key-1];
}
/*
* Mark a part of a board as configured
*/
void zorro_config_board(u_int key, u_int part)
{
if ((key < 1) || (key > zorro_num_autocon))
printk("zorro_config_board: bad key %d\n", key);
else if (part > 31)
printk("zorro_config_board: bad part %d\n", part);
else if (zorro_autocon_parts[key-1] & (1<<part))
printk("zorro_config_board: key %d part %d is already configured\n",
key, part);
else
zorro_autocon_parts[key-1] |= 1<<part;
}
/*
* Mark a part of a board as unconfigured
*
* This function is mainly intended for the unloading of LKMs
*/
void zorro_unconfig_board(u_int key, u_int part)
{
if ((key < 1) || (key > zorro_num_autocon))
printk("zorro_unconfig_board: bad key %d\n", key);
else if (part > 31)
printk("zorro_unconfig_board: bad part %d\n", part);
else if (!(zorro_autocon_parts[key-1] & (1<<part)))
printk("zorro_config_board: key %d part %d is not yet configured\n",
key, part);
else
zorro_autocon_parts[key-1] &= ~(1<<part);
}
/*
* Bitmask indicating portions of available Zorro II RAM that are unused
* by the system. Every bit represents a 64K chunk, for a maximum of 8MB
* (128 chunks, physical 0x00200000-0x009fffff).
*
* If you want to use (= allocate) portions of this RAM, you should clear
* the corresponding bits.
*
* Possible uses:
* - z2ram device
* - SCSI DMA bounce buffers
*/
u32 zorro_unused_z2ram[4] = { 0, 0, 0, 0 };
__initfunc(static void mark_region(u32 addr, u_int size, int flag))
{
u32 start, end;
if (flag) {
start = (addr+Z2RAM_CHUNKMASK) & ~Z2RAM_CHUNKMASK;
end = (addr+size) & ~Z2RAM_CHUNKMASK;
} else {
start = addr & ~Z2RAM_CHUNKMASK;
end = (addr+size+Z2RAM_CHUNKMASK) & ~Z2RAM_CHUNKMASK;
}
if (end <= Z2RAM_START || start >= Z2RAM_END)
return;
start = start < Z2RAM_START ? 0x00000000 : 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;
}
}
/*
* Initialization
*/
__initfunc(void zorro_init(void))
{
u_int i, j;
u32 disabled_z2mem = 0;
if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO)) {
printk("Zorro: No Zorro bus detected\n");
return;
}
printk("Zorro: Probing AutoConfig expansion devices: %d device%s\n",
zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
/* Mark all available Zorro II memory */
for (i = 0; i < zorro_num_autocon; i++) {
const struct ConfigDev *cd = &zorro_autocon[i];
if (cd->cd_Rom.er_Type & ERTF_MEMLIST)
mark_region((u32)cd->cd_BoardAddr, cd->cd_BoardSize, 1);
}
/* Unmark all used Zorro II memory */
for (i = 0; i < m68k_num_memory; i++)
if (m68k_memory[i].addr < 16*1024*1024) {
if (AMIGAHW_PRESENT(ZORRO3)) {
/* don't use Zorro II RAM as system memory on Zorro III */
/* capable machines */
if (i == 0) {
/* don't cut off the branch we're sitting on */
printk("Warning: kernel runs in Zorro II memory\n");
} else {
disabled_z2mem += m68k_memory[i].size;
m68k_num_memory--;
for (j = i; j < m68k_num_memory; j++)
m68k_memory[j] = m68k_memory[j+1];
i--;
continue;
}
}
mark_region(m68k_memory[i].addr, m68k_memory[i].size, 0);
}
if (disabled_z2mem)
printk("%dK of Zorro II memory will not be used as system memory\n",
disabled_z2mem>>10);
}
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