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