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m68k: Remove the broken Hades support

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This patch removes the Hades support that was marked as BROKEN 5 years ago.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adrian Bunk 2008-10-13 21:58:59 +02:00 committed by Linus Torvalds
parent 7477fb6fbc
commit 29c8a24672
14 changed files with 23 additions and 1000 deletions
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13
arch/m68k/Kconfig
View file

@ -122,22 +122,9 @@ config ATARI
this kernel on an Atari, say Y here and browse the material
available in <file:Documentation/m68k>; otherwise say N.
config HADES
bool "Hades support"
depends on ATARI && BROKEN
help
This option enables support for the Hades Atari clone. If you plan
to use this kernel on a Hades, say Y here; otherwise say N.
config PCI
bool
depends on HADES
default y
help
Find out whether you have a PCI motherboard. PCI is the name of a
bus system, i.e. the way the CPU talks to the other stuff inside
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
VESA. If you have PCI, say Y, otherwise N.
config MAC
bool "Macintosh support"

3
arch/m68k/atari/Makefile
View file

@ -5,7 +5,4 @@
obj-y := config.o time.o debug.o ataints.o stdma.o \
atasound.o stram.o
ifeq ($(CONFIG_PCI),y)
obj-$(CONFIG_HADES) += hades-pci.o
endif
obj-$(CONFIG_ATARI_KBD_CORE) += atakeyb.o

6
arch/m68k/atari/ataints.c
View file

@ -407,10 +407,8 @@ void __init atari_init_IRQ(void)
* gets overruns)
*/
if (!MACH_IS_HADES) {
vectors[VEC_INT2] = falcon_hblhandler;
vectors[VEC_INT4] = falcon_hblhandler;
}
vectors[VEC_INT2] = falcon_hblhandler;
vectors[VEC_INT4] = falcon_hblhandler;
}
if (ATARIHW_PRESENT(PCM_8BIT) && ATARIHW_PRESENT(MICROWIRE)) {

37
arch/m68k/atari/config.c
View file

@ -231,7 +231,7 @@ void __init config_atari(void)
*/
printk("Atari hardware found: ");
if (MACH_IS_MEDUSA || MACH_IS_HADES) {
if (MACH_IS_MEDUSA) {
/* There's no Atari video hardware on the Medusa, but all the
* addresses below generate a DTACK so no bus error occurs! */
} else if (hwreg_present(f030_xreg)) {
@ -269,10 +269,6 @@ void __init config_atari(void)
ATARIHW_SET(SCSI_DMA);
printk("TT_SCSI_DMA ");
}
if (!MACH_IS_HADES && hwreg_present(&st_dma.dma_hi)) {
ATARIHW_SET(STND_DMA);
printk("STND_DMA ");
}
/*
* The ST-DMA address registers aren't readable
* on all Medusas, so the test below may fail
@ -294,12 +290,11 @@ void __init config_atari(void)
ATARIHW_SET(YM_2149);
printk("YM2149 ");
}
if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
hwreg_present(&tt_dmasnd.ctrl)) {
if (!MACH_IS_MEDUSA && hwreg_present(&tt_dmasnd.ctrl)) {
ATARIHW_SET(PCM_8BIT);
printk("PCM ");
}
if (!MACH_IS_HADES && hwreg_present(&falcon_codec.unused5)) {
if (hwreg_present(&falcon_codec.unused5)) {
ATARIHW_SET(CODEC);
printk("CODEC ");
}
@ -313,7 +308,7 @@ void __init config_atari(void)
(tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) &&
(tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0)
#else
!MACH_IS_MEDUSA && !MACH_IS_HADES
!MACH_IS_MEDUSA
#endif
) {
ATARIHW_SET(SCC_DMA);
@ -327,10 +322,7 @@ void __init config_atari(void)
ATARIHW_SET(ST_ESCC);
printk("ST_ESCC ");
}
if (MACH_IS_HADES) {
ATARIHW_SET(VME);
printk("VME ");
} else if (hwreg_present(&tt_scu.sys_mask)) {
if (hwreg_present(&tt_scu.sys_mask)) {
ATARIHW_SET(SCU);
/* Assume a VME bus if there's a SCU */
ATARIHW_SET(VME);
@ -340,7 +332,7 @@ void __init config_atari(void)
ATARIHW_SET(ANALOG_JOY);
printk("ANALOG_JOY ");
}
if (!MACH_IS_HADES && hwreg_present(blitter.halftone)) {
if (hwreg_present(blitter.halftone)) {
ATARIHW_SET(BLITTER);
printk("BLITTER ");
}
@ -349,8 +341,7 @@ void __init config_atari(void)
printk("IDE ");
}
#if 1 /* This maybe wrong */
if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
hwreg_present(&tt_microwire.data) &&
if (!MACH_IS_MEDUSA && hwreg_present(&tt_microwire.data) &&
hwreg_present(&tt_microwire.mask) &&
(tt_microwire.mask = 0x7ff,
udelay(1),
@ -369,19 +360,18 @@ void __init config_atari(void)
mach_hwclk = atari_tt_hwclk;
mach_set_clock_mmss = atari_tt_set_clock_mmss;
}
if (!MACH_IS_HADES && hwreg_present(&mste_rtc.sec_ones)) {
if (hwreg_present(&mste_rtc.sec_ones)) {
ATARIHW_SET(MSTE_CLK);
printk("MSTE_CLK ");
mach_hwclk = atari_mste_hwclk;
mach_set_clock_mmss = atari_mste_set_clock_mmss;
}
if (!MACH_IS_MEDUSA && !MACH_IS_HADES &&
hwreg_present(&dma_wd.fdc_speed) &&
if (!MACH_IS_MEDUSA && hwreg_present(&dma_wd.fdc_speed) &&
hwreg_write(&dma_wd.fdc_speed, 0)) {
ATARIHW_SET(FDCSPEED);
printk("FDC_SPEED ");
}
if (!MACH_IS_HADES && !ATARIHW_PRESENT(ST_SCSI)) {
if (!ATARIHW_PRESENT(ST_SCSI)) {
ATARIHW_SET(ACSI);
printk("ACSI ");
}
@ -449,7 +439,7 @@ void __init config_atari(void)
* 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible
* in the last 16MB of the address space.
*/
tos_version = (MACH_IS_MEDUSA || MACH_IS_HADES) ?
tos_version = (MACH_IS_MEDUSA) ?
0xfff : *(unsigned short *)0xff000002;
atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68;
}
@ -511,8 +501,7 @@ static void atari_reset(void)
* On the Medusa, phys. 0x4 may contain garbage because it's no
* ROM. See above for explanation why we cannot use PTOV(4).
*/
reset_addr = MACH_IS_HADES ? 0x7fe00030 :
MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 :
reset_addr = MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 :
*(unsigned long *) 0xff000004;
/* reset ACIA for switch off OverScan, if it's active */
@ -606,8 +595,6 @@ static void atari_get_model(char *model)
if (MACH_IS_MEDUSA)
/* Medusa has TT _MCH cookie */
strcat(model, "Medusa");
else if (MACH_IS_HADES)
strcat(model, "Hades");
else
strcat(model, "TT");
break;

440
arch/m68k/atari/hades-pci.c
View file

@ -1,440 +0,0 @@
/*
* hades-pci.c - Hardware specific PCI BIOS functions the Hades Atari clone.
*
* Written by Wout Klaren.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <asm/io.h>
#if 0
# define DBG_DEVS(args) printk args
#else
# define DBG_DEVS(args)
#endif
#if defined(CONFIG_PCI) && defined(CONFIG_HADES)
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/byteorder.h>
#include <asm/pci.h>
#define HADES_MEM_BASE 0x80000000
#define HADES_MEM_SIZE 0x20000000
#define HADES_CONFIG_BASE 0xA0000000
#define HADES_CONFIG_SIZE 0x10000000
#define HADES_IO_BASE 0xB0000000
#define HADES_IO_SIZE 0x10000000
#define HADES_VIRT_IO_SIZE 0x00010000 /* Only 64k is remapped and actually used. */
#define N_SLOTS 4 /* Number of PCI slots. */
static const char pci_mem_name[] = "PCI memory space";
static const char pci_io_name[] = "PCI I/O space";
static const char pci_config_name[] = "PCI config space";
static struct resource config_space = {
.name = pci_config_name,
.start = HADES_CONFIG_BASE,
.end = HADES_CONFIG_BASE + HADES_CONFIG_SIZE - 1
};
static struct resource io_space = {
.name = pci_io_name,
.start = HADES_IO_BASE,
.end = HADES_IO_BASE + HADES_IO_SIZE - 1
};
static const unsigned long pci_conf_base_phys[] = {
0xA0080000, 0xA0040000, 0xA0020000, 0xA0010000
};
static unsigned long pci_conf_base_virt[N_SLOTS];
static unsigned long pci_io_base_virt;
/*
* static void *mk_conf_addr(unsigned char bus, unsigned char device_fn,
* unsigned char where)
*
* Calculate the address of the PCI configuration area of the given
* device.
*
* BUG: boards with multiple functions are probably not correctly
* supported.
*/
static void *mk_conf_addr(struct pci_dev *dev, int where)
{
int device = dev->devfn >> 3, function = dev->devfn & 7;
void *result;
DBG_DEVS(("mk_conf_addr(bus=%d ,device_fn=0x%x, where=0x%x, pci_addr=0x%p)\n",
dev->bus->number, dev->devfn, where, pci_addr));
if (device > 3)
{
DBG_DEVS(("mk_conf_addr: device (%d) > 3, returning NULL\n", device));
return NULL;
}
if (dev->bus->number != 0)
{
DBG_DEVS(("mk_conf_addr: bus (%d) > 0, returning NULL\n", device));
return NULL;
}
result = (void *) (pci_conf_base_virt[device] | (function << 8) | (where));
DBG_DEVS(("mk_conf_addr: returning pci_addr 0x%lx\n", (unsigned long) result));
return result;
}
static int hades_read_config_byte(struct pci_dev *dev, int where, u8 *value)
{
volatile unsigned char *pci_addr;
*value = 0xff;
if ((pci_addr = (unsigned char *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
*value = *pci_addr;
return PCIBIOS_SUCCESSFUL;
}
static int hades_read_config_word(struct pci_dev *dev, int where, u16 *value)
{
volatile unsigned short *pci_addr;
*value = 0xffff;
if (where & 0x1)
return PCIBIOS_BAD_REGISTER_NUMBER;
if ((pci_addr = (unsigned short *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
*value = le16_to_cpu(*pci_addr);
return PCIBIOS_SUCCESSFUL;
}
static int hades_read_config_dword(struct pci_dev *dev, int where, u32 *value)
{
volatile unsigned int *pci_addr;
unsigned char header_type;
int result;
*value = 0xffffffff;
if (where & 0x3)
return PCIBIOS_BAD_REGISTER_NUMBER;
if ((pci_addr = (unsigned int *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
*value = le32_to_cpu(*pci_addr);
/*
* Check if the value is an address on the bus. If true, add the
* base address of the PCI memory or PCI I/O area on the Hades.
*/
if ((result = hades_read_config_byte(dev, PCI_HEADER_TYPE,
&header_type)) != PCIBIOS_SUCCESSFUL)
return result;
if (((where >= PCI_BASE_ADDRESS_0) && (where <= PCI_BASE_ADDRESS_1)) ||
((header_type != PCI_HEADER_TYPE_BRIDGE) && ((where >= PCI_BASE_ADDRESS_2) &&
(where <= PCI_BASE_ADDRESS_5))))
{
if ((*value & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO)
{
/*
* Base address register that contains an I/O address. If the
* address is valid on the Hades (0 <= *value < HADES_VIRT_IO_SIZE),
* add 'pci_io_base_virt' to the value.
*/
if (*value < HADES_VIRT_IO_SIZE)
*value += pci_io_base_virt;
}
else
{
/*
* Base address register that contains an memory address. If the
* address is valid on the Hades (0 <= *value < HADES_MEM_SIZE),
* add HADES_MEM_BASE to the value.
*/
if (*value == 0)
{
/*
* Base address is 0. Test if this base
* address register is used.
*/
*pci_addr = 0xffffffff;
if (*pci_addr != 0)
{
*pci_addr = *value;
if (*value < HADES_MEM_SIZE)
*value += HADES_MEM_BASE;
}
}
else
{
if (*value < HADES_MEM_SIZE)
*value += HADES_MEM_BASE;
}
}
}
return PCIBIOS_SUCCESSFUL;
}
static int hades_write_config_byte(struct pci_dev *dev, int where, u8 value)
{
volatile unsigned char *pci_addr;
if ((pci_addr = (unsigned char *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
*pci_addr = value;
return PCIBIOS_SUCCESSFUL;
}
static int hades_write_config_word(struct pci_dev *dev, int where, u16 value)
{
volatile unsigned short *pci_addr;
if ((pci_addr = (unsigned short *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
*pci_addr = cpu_to_le16(value);
return PCIBIOS_SUCCESSFUL;
}
static int hades_write_config_dword(struct pci_dev *dev, int where, u32 value)
{
volatile unsigned int *pci_addr;
unsigned char header_type;
int result;
if ((pci_addr = (unsigned int *) mk_conf_addr(dev, where)) == NULL)
return PCIBIOS_DEVICE_NOT_FOUND;
/*
* Check if the value is an address on the bus. If true, subtract the
* base address of the PCI memory or PCI I/O area on the Hades.
*/
if ((result = hades_read_config_byte(dev, PCI_HEADER_TYPE,
&header_type)) != PCIBIOS_SUCCESSFUL)
return result;
if (((where >= PCI_BASE_ADDRESS_0) && (where <= PCI_BASE_ADDRESS_1)) ||
((header_type != PCI_HEADER_TYPE_BRIDGE) && ((where >= PCI_BASE_ADDRESS_2) &&
(where <= PCI_BASE_ADDRESS_5))))
{
if ((value & PCI_BASE_ADDRESS_SPACE) ==
PCI_BASE_ADDRESS_SPACE_IO)
{
/*
* I/O address. Check if the address is valid address on
* the Hades (pci_io_base_virt <= value < pci_io_base_virt +
* HADES_VIRT_IO_SIZE) or if the value is 0xffffffff. If not
* true do not write the base address register. If it is a
* valid base address subtract 'pci_io_base_virt' from the value.
*/
if ((value >= pci_io_base_virt) && (value < (pci_io_base_virt +
HADES_VIRT_IO_SIZE)))
value -= pci_io_base_virt;
else
{
if (value != 0xffffffff)
return PCIBIOS_SET_FAILED;
}
}
else
{
/*
* Memory address. Check if the address is valid address on
* the Hades (HADES_MEM_BASE <= value < HADES_MEM_BASE + HADES_MEM_SIZE) or
* if the value is 0xffffffff. If not true do not write
* the base address register. If it is a valid base address
* subtract HADES_MEM_BASE from the value.
*/
if ((value >= HADES_MEM_BASE) && (value < (HADES_MEM_BASE + HADES_MEM_SIZE)))
value -= HADES_MEM_BASE;
else
{
if (value != 0xffffffff)
return PCIBIOS_SET_FAILED;
}
}
}
*pci_addr = cpu_to_le32(value);
return PCIBIOS_SUCCESSFUL;
}
/*
* static inline void hades_fixup(void)
*
* Assign IRQ numbers as used by Linux to the interrupt pins
* of the PCI cards.
*/
static void __init hades_fixup(int pci_modify)
{
char irq_tab[4] = {
[0] = IRQ_TT_MFP_IO0, /* Slot 0. */
[1] = IRQ_TT_MFP_IO1, /* Slot 1. */
[2] = IRQ_TT_MFP_SCC, /* Slot 2. */
[3] = IRQ_TT_MFP_SCSIDMA /* Slot 3. */
};
struct pci_dev *dev = NULL;
unsigned char slot;
/*
* Go through all devices, fixing up irqs as we see fit:
*/
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL)
{
if (dev->class >> 16 != PCI_BASE_CLASS_BRIDGE)
{
slot = PCI_SLOT(dev->devfn); /* Determine slot number. */
dev->irq = irq_tab[slot];
if (pci_modify)
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}
}
}
/*
* static void hades_conf_device(struct pci_dev *dev)
*
* Machine dependent Configure the given device.
*
* Parameters:
*
* dev - the pci device.
*/
static void __init hades_conf_device(struct pci_dev *dev)
{
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0);
}
static struct pci_ops hades_pci_ops = {
.read_byte = hades_read_config_byte,
.read_word = hades_read_config_word,
.read_dword = hades_read_config_dword,
.write_byte = hades_write_config_byte,
.write_word = hades_write_config_word,
.write_dword = hades_write_config_dword
};
/*
* struct pci_bus_info *init_hades_pci(void)
*
* Machine specific initialisation:
*
* - Allocate and initialise a 'pci_bus_info' structure
* - Initialise hardware
*
* Result: pointer to 'pci_bus_info' structure.
*/
struct pci_bus_info * __init init_hades_pci(void)
{
struct pci_bus_info *bus;
int i;
/*
* Remap I/O and configuration space.
*/
pci_io_base_virt = (unsigned long) ioremap(HADES_IO_BASE, HADES_VIRT_IO_SIZE);
for (i = 0; i < N_SLOTS; i++)
pci_conf_base_virt[i] = (unsigned long) ioremap(pci_conf_base_phys[i], 0x10000);
/*
* Allocate memory for bus info structure.
*/
bus = kzalloc(sizeof(struct pci_bus_info), GFP_KERNEL);
if (unlikely(!bus))
goto iounmap_base_virt;
/*
* Claim resources. The m68k has no separate I/O space, both
* PCI memory space and PCI I/O space are in memory space. Therefore
* the I/O resources are requested in memory space as well.
*/
if (unlikely(request_resource(&iomem_resource, &config_space) != 0))
goto free_bus;
if (unlikely(request_resource(&iomem_resource, &io_space) != 0))
goto release_config_space;
bus->mem_space.start = HADES_MEM_BASE;
bus->mem_space.end = HADES_MEM_BASE + HADES_MEM_SIZE - 1;
bus->mem_space.name = pci_mem_name;
#if 1
if (unlikely(request_resource(&iomem_resource, &bus->mem_space) != 0))
goto release_io_space;
#endif
bus->io_space.start = pci_io_base_virt;
bus->io_space.end = pci_io_base_virt + HADES_VIRT_IO_SIZE - 1;
bus->io_space.name = pci_io_name;
#if 1
if (unlikely(request_resource(&ioport_resource, &bus->io_space) != 0))
goto release_bus_mem_space;
#endif
/*
* Set hardware dependent functions.
*/
bus->m68k_pci_ops = &hades_pci_ops;
bus->fixup = hades_fixup;
bus->conf_device = hades_conf_device;
/*
* Select high to low edge for PCI interrupts.
*/
tt_mfp.active_edge &= ~0x27;
return bus;
release_bus_mem_space:
release_resource(&bus->mem_space);
release_io_space:
release_resource(&io_space);
release_config_space:
release_resource(&config_space);
free_bus:
kfree(bus);
iounmap_base_virt:
iounmap((void *)pci_io_base_virt);
for (i = 0; i < N_SLOTS; i++)
iounmap((void *)pci_conf_base_virt[i]);
return NULL;
}
#endif

6
arch/m68k/kernel/bios32.c
View file

@ -476,10 +476,12 @@ void __init pcibios_init(void)
printk("Linux/m68k PCI BIOS32 revision %x.%02x\n", MAJOR_REV, MINOR_REV);
bus_info = NULL;
#ifdef CONFIG_HADES
/* Hades code was:
if (MACH_IS_HADES)
bus_info = init_hades_pci();
#endif
*/
if (bus_info != NULL)
{
printk("PCI: Probing PCI hardware\n");

2
arch/m68k/kernel/process.c
View file

@ -78,7 +78,7 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
static void default_idle(void)
{
if (!need_resched())
#if defined(MACH_ATARI_ONLY) && !defined(CONFIG_HADES)
#if defined(MACH_ATARI_ONLY)
/* block out HSYNC on the atari (falcon) */
__asm__("stop #0x2200" : : : "cc");
#else

4
drivers/block/ataflop.c
View file

@ -1882,10 +1882,6 @@ static int __init atari_floppy_init (void)
/* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
return -ENODEV;
if (MACH_IS_HADES)
/* Hades doesn't have Atari-compatible floppy */
return -ENODEV;
if (register_blkdev(FLOPPY_MAJOR,"fd"))
return -EBUSY;

8
drivers/scsi/Kconfig
View file

@ -1670,14 +1670,6 @@ config ATARI_SCSI_RESET_BOOT
boot process fractionally longer but may assist recovery from errors
that leave the devices with SCSI operations partway completed.
config TT_DMA_EMUL
bool "Hades SCSI DMA emulator"
depends on ATARI_SCSI && HADES
help
This option enables code which emulates the TT SCSI DMA chip on the
Hades. This increases the SCSI transfer rates at least ten times
compared to PIO transfers.
config MAC_SCSI
bool "Macintosh NCR5380 SCSI"
depends on MAC && SCSI=y

468
drivers/scsi/atari_dma_emul.c
View file

@ -1,468 +0,0 @@
/*
* atari_dma_emul.c -- TT SCSI DMA emulator for the Hades.
*
* Copyright 1997 Wout Klaren <W.Klaren@inter.nl.net>
*
* 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.
*
* This code was written using the Hades TOS source code as a
* reference. This source code can be found on the home page
* of Medusa Computer Systems.
*
* Version 0.1, 1997-09-24.
*
* This code should be considered experimental. It has only been
* tested on a Hades with a 68060. It might not work on a Hades
* with a 68040. Make backups of your hard drives before using
* this code.
*/
#include <linux/compiler.h>
#include <asm/thread_info.h>
#include <asm/uaccess.h>
#define hades_dma_ctrl (*(unsigned char *) 0xffff8717)
#define hades_psdm_reg (*(unsigned char *) 0xffff8741)
#define TRANSFER_SIZE 16
struct m68040_frame {
unsigned long effaddr; /* effective address */
unsigned short ssw; /* special status word */
unsigned short wb3s; /* write back 3 status */
unsigned short wb2s; /* write back 2 status */
unsigned short wb1s; /* write back 1 status */
unsigned long faddr; /* fault address */
unsigned long wb3a; /* write back 3 address */
unsigned long wb3d; /* write back 3 data */
unsigned long wb2a; /* write back 2 address */
unsigned long wb2d; /* write back 2 data */
unsigned long wb1a; /* write back 1 address */
unsigned long wb1dpd0; /* write back 1 data/push data 0*/
unsigned long pd1; /* push data 1*/
unsigned long pd2; /* push data 2*/
unsigned long pd3; /* push data 3*/
};
static void writeback (unsigned short wbs, unsigned long wba,
unsigned long wbd, void *old_buserr)
{
mm_segment_t fs = get_fs();
static void *save_buserr;
__asm__ __volatile__ ("movec.l %%vbr,%%a0\n\t"
"move.l %0,8(%%a0)\n\t"
:
: "r" (&&bus_error)
: "a0" );
save_buserr = old_buserr;
set_fs (MAKE_MM_SEG(wbs & WBTM_040));
switch (wbs & WBSIZ_040) {
case BA_SIZE_BYTE:
put_user (wbd & 0xff, (char *)wba);
break;
case BA_SIZE_WORD:
put_user (wbd & 0xffff, (short *)wba);
break;
case BA_SIZE_LONG:
put_user (wbd, (int *)wba);
break;
}
set_fs (fs);
return;
bus_error:
__asm__ __volatile__ ("cmp.l %0,2(%%sp)\n\t"
"bcs.s .jump_old\n\t"
"cmp.l %1,2(%%sp)\n\t"
"bls.s .restore_old\n"
".jump_old:\n\t"
"move.l %2,-(%%sp)\n\t"
"rts\n"
".restore_old:\n\t"
"move.l %%a0,-(%%sp)\n\t"
"movec.l %%vbr,%%a0\n\t"
"move.l %2,8(%%a0)\n\t"
"move.l (%%sp)+,%%a0\n\t"
"rte\n\t"
:
: "i" (writeback), "i" (&&bus_error),
"m" (save_buserr) );
}
/*
* static inline void set_restdata_reg(unsigned char *cur_addr)
*
* Set the rest data register if necessary.
*/
static inline void set_restdata_reg(unsigned char *cur_addr)
{
if (((long) cur_addr & ~3) != 0)
tt_scsi_dma.dma_restdata =
*((unsigned long *) ((long) cur_addr & ~3));
}
/*
* void hades_dma_emulator(int irq, void *dummy)
*
* This code emulates TT SCSI DMA on the Hades.
*
* Note the following:
*
* 1. When there is no byte available to read from the SCSI bus, or
* when a byte cannot yet bet written to the SCSI bus, a bus
* error occurs when reading or writing the pseudo DMA data
* register (hades_psdm_reg). We have to catch this bus error
* and try again to read or write the byte. If after several tries
* we still get a bus error, the interrupt handler is left. When
* the byte can be read or written, the interrupt handler is
* called again.
*
* 2. The SCSI interrupt must be disabled in this interrupt handler.
*
* 3. If we set the EOP signal, the SCSI controller still expects one
* byte to be read or written. Therefore the last byte is transferred
* separately, after setting the EOP signal.
*
* 4. When this function is left, the address pointer (start_addr) is
* converted to a physical address. Because it points one byte
* further than the last transferred byte, it can point outside the
* current page. If virt_to_phys() is called with this address we
* might get an access error. Therefore virt_to_phys() is called with
* start_addr - 1 if the count has reached zero. The result is
* increased with one.
*/
static irqreturn_t hades_dma_emulator(int irq, void *dummy)
{
unsigned long dma_base;
register unsigned long dma_cnt asm ("d3");
static long save_buserr;
register unsigned long save_sp asm ("d4");
register int tries asm ("d5");
register unsigned char *start_addr asm ("a3"), *end_addr asm ("a4");
register unsigned char *eff_addr;
register unsigned char *psdm_reg;
unsigned long rem;
atari_disable_irq(IRQ_TT_MFP_SCSI);
/*
* Read the dma address and count registers.
*/
dma_base = SCSI_DMA_READ_P(dma_addr);
dma_cnt = SCSI_DMA_READ_P(dma_cnt);
/*
* Check if DMA is still enabled.
*/
if ((tt_scsi_dma.dma_ctrl & 2) == 0)
{
atari_enable_irq(IRQ_TT_MFP_SCSI);
return IRQ_HANDLED;
}
if (dma_cnt == 0)
{
printk(KERN_NOTICE "DMA emulation: count is zero.\n");
tt_scsi_dma.dma_ctrl &= 0xfd; /* DMA ready. */
atari_enable_irq(IRQ_TT_MFP_SCSI);
return IRQ_HANDLED;
}
/*
* Install new bus error routine.
*/
__asm__ __volatile__ ("movec.l %%vbr,%%a0\n\t"
"move.l 8(%%a0),%0\n\t"
"move.l %1,8(%%a0)\n\t"
: "=&r" (save_buserr)
: "r" (&&scsi_bus_error)
: "a0" );
hades_dma_ctrl &= 0xfc; /* Bus error and EOP off. */
/*
* Save the stack pointer.
*/
__asm__ __volatile__ ("move.l %%sp,%0\n\t"
: "=&r" (save_sp) );
tries = 100; /* Maximum number of bus errors. */
start_addr = phys_to_virt(dma_base);
end_addr = start_addr + dma_cnt;
scsi_loop:
dma_cnt--;
rem = dma_cnt & (TRANSFER_SIZE - 1);
dma_cnt &= ~(TRANSFER_SIZE - 1);
psdm_reg = &hades_psdm_reg;
if (tt_scsi_dma.dma_ctrl & 1) /* Read or write? */
{
/*
* SCSI write. Abort when count is zero.
*/
switch (rem)
{
case 0:
while (dma_cnt > 0)
{
dma_cnt -= TRANSFER_SIZE;
*psdm_reg = *start_addr++;
case 15:
*psdm_reg = *start_addr++;
case 14:
*psdm_reg = *start_addr++;
case 13:
*psdm_reg = *start_addr++;
case 12:
*psdm_reg = *start_addr++;
case 11:
*psdm_reg = *start_addr++;
case 10:
*psdm_reg = *start_addr++;
case 9:
*psdm_reg = *start_addr++;
case 8:
*psdm_reg = *start_addr++;
case 7:
*psdm_reg = *start_addr++;
case 6:
*psdm_reg = *start_addr++;
case 5:
*psdm_reg = *start_addr++;
case 4:
*psdm_reg = *start_addr++;
case 3:
*psdm_reg = *start_addr++;
case 2:
*psdm_reg = *start_addr++;
case 1:
*psdm_reg = *start_addr++;
}
}
hades_dma_ctrl |= 1; /* Set EOP. */
udelay(10);
*psdm_reg = *start_addr++; /* Dummy byte. */
tt_scsi_dma.dma_ctrl &= 0xfd; /* DMA ready. */
}
else
{
/*
* SCSI read. Abort when count is zero.
*/
switch (rem)
{
case 0:
while (dma_cnt > 0)
{
dma_cnt -= TRANSFER_SIZE;
*start_addr++ = *psdm_reg;
case 15:
*start_addr++ = *psdm_reg;
case 14:
*start_addr++ = *psdm_reg;
case 13:
*start_addr++ = *psdm_reg;
case 12:
*start_addr++ = *psdm_reg;
case 11:
*start_addr++ = *psdm_reg;
case 10:
*start_addr++ = *psdm_reg;
case 9:
*start_addr++ = *psdm_reg;
case 8:
*start_addr++ = *psdm_reg;
case 7:
*start_addr++ = *psdm_reg;
case 6:
*start_addr++ = *psdm_reg;
case 5:
*start_addr++ = *psdm_reg;
case 4:
*start_addr++ = *psdm_reg;
case 3:
*start_addr++ = *psdm_reg;
case 2:
*start_addr++ = *psdm_reg;
case 1:
*start_addr++ = *psdm_reg;
}
}
hades_dma_ctrl |= 1; /* Set EOP. */
udelay(10);
*start_addr++ = *psdm_reg;
tt_scsi_dma.dma_ctrl &= 0xfd; /* DMA ready. */
set_restdata_reg(start_addr);
}
if (start_addr != end_addr)
printk(KERN_CRIT "DMA emulation: FATAL: Count is not zero at end of transfer.\n");
dma_cnt = end_addr - start_addr;
scsi_end:
dma_base = (dma_cnt == 0) ? virt_to_phys(start_addr - 1) + 1 :
virt_to_phys(start_addr);
SCSI_DMA_WRITE_P(dma_addr, dma_base);
SCSI_DMA_WRITE_P(dma_cnt, dma_cnt);
/*
* Restore old bus error routine.
*/
__asm__ __volatile__ ("movec.l %%vbr,%%a0\n\t"
"move.l %0,8(%%a0)\n\t"
:
: "r" (save_buserr)
: "a0" );
atari_enable_irq(IRQ_TT_MFP_SCSI);
return IRQ_HANDLED;
scsi_bus_error:
/*
* First check if the bus error is caused by our code.
* If not, call the original handler.
*/
__asm__ __volatile__ ("cmp.l %0,2(%%sp)\n\t"
"bcs.s .old_vector\n\t"
"cmp.l %1,2(%%sp)\n\t"
"bls.s .scsi_buserr\n"
".old_vector:\n\t"
"move.l %2,-(%%sp)\n\t"
"rts\n"
".scsi_buserr:\n\t"
:
: "i" (&&scsi_loop), "i" (&&scsi_end),
"m" (save_buserr) );
if (CPU_IS_060)
{
/*
* Get effective address and restore the stack.
*/
__asm__ __volatile__ ("move.l 8(%%sp),%0\n\t"
"move.l %1,%%sp\n\t"
: "=a&" (eff_addr)
: "r" (save_sp) );
}
else
{
register struct m68040_frame *frame;
__asm__ __volatile__ ("lea 8(%%sp),%0\n\t"
: "=a&" (frame) );
if (tt_scsi_dma.dma_ctrl & 1)
{
/*
* Bus error while writing.
*/
if (frame->wb3s & WBV_040)
{
if (frame->wb3a == (long) &hades_psdm_reg)
start_addr--;
else
writeback(frame->wb3s, frame->wb3a,
frame->wb3d, &&scsi_bus_error);
}
if (frame->wb2s & WBV_040)
{
if (frame->wb2a == (long) &hades_psdm_reg)
start_addr--;
else
writeback(frame->wb2s, frame->wb2a,
frame->wb2d, &&scsi_bus_error);
}
if (frame->wb1s & WBV_040)
{
if (frame->wb1a == (long) &hades_psdm_reg)
start_addr--;
}
}
else
{
/*
* Bus error while reading.
*/
if (frame->wb3s & WBV_040)
writeback(frame->wb3s, frame->wb3a,
frame->wb3d, &&scsi_bus_error);
}
eff_addr = (unsigned char *) frame->faddr;
__asm__ __volatile__ ("move.l %0,%%sp\n\t"
:
: "r" (save_sp) );
}
dma_cnt = end_addr - start_addr;
if (eff_addr == &hades_psdm_reg)
{
/*
* Bus error occurred while reading the pseudo
* DMA register. Time out.
*/
tries--;
if (tries <= 0)
{
if ((tt_scsi_dma.dma_ctrl & 1) == 0) /* Read or write? */
set_restdata_reg(start_addr);
if (dma_cnt <= 1)
printk(KERN_CRIT "DMA emulation: Fatal "
"error while %s the last byte.\n",
(tt_scsi_dma.dma_ctrl & 1)
? "writing" : "reading");
goto scsi_end;
}
else
goto scsi_loop;
}
else
{
/*
* Bus error during pseudo DMA transfer.
* Terminate the DMA transfer.
*/
hades_dma_ctrl |= 3; /* Set EOP and bus error. */
if ((tt_scsi_dma.dma_ctrl & 1) == 0) /* Read or write? */
set_restdata_reg(start_addr);
goto scsi_end;
}
}

27
drivers/scsi/atari_scsi.c
View file

@ -249,10 +249,6 @@ static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
#if defined(CONFIG_TT_DMA_EMUL)
#include "atari_dma_emul.c"
#endif
#if defined(REAL_DMA)
static int scsi_dma_is_ignored_buserr(unsigned char dma_stat)
@ -695,21 +691,8 @@ int atari_scsi_detect(struct scsi_host_template *host)
#ifdef REAL_DMA
tt_scsi_dma.dma_ctrl = 0;
atari_dma_residual = 0;
#ifdef CONFIG_TT_DMA_EMUL
if (MACH_IS_HADES) {
if (request_irq(IRQ_AUTO_2, hades_dma_emulator,
IRQ_TYPE_PRIO, "Hades DMA emulator",
hades_dma_emulator)) {
printk(KERN_ERR "atari_scsi_detect: cannot allocate irq %d, aborting (MACH_IS_HADES)",IRQ_AUTO_2);
free_irq(IRQ_TT_MFP_SCSI, instance);
scsi_unregister(atari_scsi_host);
atari_stram_free(atari_dma_buffer);
atari_dma_buffer = 0;
return 0;
}
}
#endif
if (MACH_IS_MEDUSA || MACH_IS_HADES) {
if (MACH_IS_MEDUSA) {
/* While the read overruns (described by Drew Eckhardt in
* NCR5380.c) never happened on TTs, they do in fact on the Medusa
* (This was the cause why SCSI didn't work right for so long
@ -1007,11 +990,7 @@ static unsigned long atari_dma_xfer_len(unsigned long wanted_len,
Scsi_Cmnd *cmd, int write_flag)
{
unsigned long possible_len, limit;
#ifndef CONFIG_TT_DMA_EMUL
if (MACH_IS_HADES)
/* Hades has no SCSI DMA at all :-( Always force use of PIO */
return 0;
#endif
if (IS_A_TT())
/* TT SCSI DMA can transfer arbitrary #bytes */
return wanted_len;

1
include/asm-m68k/atarihw.h
View file

@ -39,7 +39,6 @@ extern int atari_dont_touch_floppy_select;
#define MACH_IS_TT ((atari_mch_cookie >> 16) == ATARI_MCH_TT)
#define MACH_IS_FALCON ((atari_mch_cookie >> 16) == ATARI_MCH_FALCON)
#define MACH_IS_MEDUSA (atari_mch_type == ATARI_MACH_MEDUSA)
#define MACH_IS_HADES (atari_mch_type == ATARI_MACH_HADES)
#define MACH_IS_AB40 (atari_mch_type == ATARI_MACH_AB40)
/* values for atari_switches */

2
include/asm-m68k/entry.h
View file

@ -31,7 +31,7 @@
*/
/* the following macro is used when enabling interrupts */
#if defined(MACH_ATARI_ONLY) && !defined(CONFIG_HADES)
#if defined(MACH_ATARI_ONLY)
/* block out HSYNC on the atari */
#define ALLOWINT (~0x400)
#define MAX_NOINT_IPL 3

6
include/asm-m68k/virtconvert.h
View file

@ -40,15 +40,9 @@ static inline void *phys_to_virt(unsigned long address)
/*
* IO bus memory addresses are 1:1 with the physical address,
* except on the PCI bus of the Hades.
*/
#ifdef CONFIG_HADES
#define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0))
#define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0)))
#else
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#endif
#endif
#endif