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esp: add Tekram DC-390 emulation (PC SCSI adapter)

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Difference with AMD PCscsi is that DC-390 contains a EEPROM,
and that a romfile is available to add INT13 support.

This has been successfully tested on:
- MS DOS 6.22 (using DC390 ASPI driver)
- MS Windows 98 SE (using DC390 driver)
- MS Windows NT 3.1 (using DC390 driver)
- MS Windows NT 4.0 (using DC390 driver)
- hard disk and cdrom boot

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Hervé Poussineau 2012-08-04 21:10:06 +02:00 committed by Blue Swirl
parent bde299a247
commit cea936b1b5
1 changed files with 123 additions and 1 deletions
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124
hw/esp-pci.c
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@ -24,10 +24,13 @@
*/
#include "pci.h"
#include "eeprom93xx.h"
#include "esp.h"
#include "trace.h"
#include "qemu-log.h"
#define TYPE_AM53C974_DEVICE "am53c974"
#define DMA_CMD 0x0
#define DMA_STC 0x1
#define DMA_SPA 0x2
@ -382,15 +385,134 @@ static void esp_pci_class_init(ObjectClass *klass, void *data)
}
static const TypeInfo esp_pci_info = {
.name = "am53c974",
.name = TYPE_AM53C974_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIESPState),
.class_init = esp_pci_class_init,
};
typedef struct {
PCIESPState pci;
eeprom_t *eeprom;
} DC390State;
#define TYPE_DC390_DEVICE "dc390"
#define DC390(obj) \
OBJECT_CHECK(DC390State, obj, TYPE_DC390_DEVICE)
#define EE_ADAPT_SCSI_ID 64
#define EE_MODE2 65
#define EE_DELAY 66
#define EE_TAG_CMD_NUM 67
#define EE_ADAPT_OPTIONS 68
#define EE_BOOT_SCSI_ID 69
#define EE_BOOT_SCSI_LUN 70
#define EE_CHKSUM1 126
#define EE_CHKSUM2 127
#define EE_ADAPT_OPTION_F6_F8_AT_BOOT 0x01
#define EE_ADAPT_OPTION_BOOT_FROM_CDROM 0x02
#define EE_ADAPT_OPTION_INT13 0x04
#define EE_ADAPT_OPTION_SCAM_SUPPORT 0x08
static uint32_t dc390_read_config(PCIDevice *dev, uint32_t addr, int l)
{
DC390State *pci = DC390(dev);
uint32_t val;
val = pci_default_read_config(dev, addr, l);
if (addr == 0x00 && l == 1) {
/* First byte of address space is AND-ed with EEPROM DO line */
if (!eeprom93xx_read(pci->eeprom)) {
val &= ~0xff;
}
}
return val;
}
static void dc390_write_config(PCIDevice *dev,
uint32_t addr, uint32_t val, int l)
{
DC390State *pci = DC390(dev);
if (addr == 0x80) {
/* EEPROM write */
int eesk = val & 0x80 ? 1 : 0;
int eedi = val & 0x40 ? 1 : 0;
eeprom93xx_write(pci->eeprom, 1, eesk, eedi);
} else if (addr == 0xc0) {
/* EEPROM CS low */
eeprom93xx_write(pci->eeprom, 0, 0, 0);
} else {
pci_default_write_config(dev, addr, val, l);
}
}
static int dc390_scsi_init(PCIDevice *dev)
{
DC390State *pci = DC390(dev);
uint8_t *contents;
uint16_t chksum = 0;
int i, ret;
/* init base class */
ret = esp_pci_scsi_init(dev);
if (ret < 0) {
return ret;
}
/* EEPROM */
pci->eeprom = eeprom93xx_new(DEVICE(dev), 64);
/* set default eeprom values */
contents = (uint8_t *)eeprom93xx_data(pci->eeprom);
for (i = 0; i < 16; i++) {
contents[i * 2] = 0x57;
contents[i * 2 + 1] = 0x00;
}
contents[EE_ADAPT_SCSI_ID] = 7;
contents[EE_MODE2] = 0x0f;
contents[EE_TAG_CMD_NUM] = 0x04;
contents[EE_ADAPT_OPTIONS] = EE_ADAPT_OPTION_F6_F8_AT_BOOT
| EE_ADAPT_OPTION_BOOT_FROM_CDROM
| EE_ADAPT_OPTION_INT13;
/* update eeprom checksum */
for (i = 0; i < EE_CHKSUM1; i += 2) {
chksum += contents[i] + (((uint16_t)contents[i + 1]) << 8);
}
chksum = 0x1234 - chksum;
contents[EE_CHKSUM1] = chksum & 0xff;
contents[EE_CHKSUM2] = chksum >> 8;
return 0;
}
static void dc390_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->init = dc390_scsi_init;
k->config_read = dc390_read_config;
k->config_write = dc390_write_config;
dc->desc = "Tekram DC-390 SCSI adapter";
}
static const TypeInfo dc390_info = {
.name = "dc390",
.parent = TYPE_AM53C974_DEVICE,
.instance_size = sizeof(DC390State),
.class_init = dc390_class_init,
};
static void esp_pci_register_types(void)
{
type_register_static(&esp_pci_info);
type_register_static(&dc390_info);
}
type_init(esp_pci_register_types)