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Control channel framework 

Building the framework for communicating with the GreenSCSI command line over the SCSI bus.
This commit is contained in:
David Kuder 2022-06-11 10:59:23 -04:00
parent 5aeb32e928
commit 968f3336af
5 changed files with 148 additions and 1 deletions
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9
src/cmd.ino
View File

@ -1506,6 +1506,12 @@ void createcmd(int argc, char **argv) {
goto success;
}
#endif /* SUPPORT_TAPE */
#if SUPPORT_CONTROL
if(!strcasecmp(argv[1], "control")) {
ConfigureControl(h, NULL);
goto success;
}
#endif /* SUPPORT_CONTROL */
//failure:
errorlevel = -1;
@ -1711,6 +1717,9 @@ void saveconfig(int argc, char **argv) {
if(h->m_enabled) {
// The create command automatically changes directory to the created object
switch(h->m_type) {
case DEV_PROCESSOR:
config_file.print("create control\r\n");
break;
case DEV_DISK:
config_file.print("create disk\r\n");
break;

2
src/config.h
View File

@ -22,6 +22,7 @@
#define MAX_BLOCKSIZE (1 << 15) // Maximum BLOCK size (2048 to 8192 tested, 16384 had issues)
#define SCSI_INQUIRY_RESPONSE_SIZE 96
extern uint8_t SCSI_INQUIRY_RESPONSE[][SCSI_INQUIRY_RESPONSE_SIZE];
// Supported Device Types
#define SUPPORT_DISK true
@ -29,6 +30,7 @@
#define SUPPORT_TAPE false
#define SUPPORT_MO false
#define SUPPORT_INITIATOR true
#define SUPPORT_CONTROL true
// Compatibility Settings
#define SUPPORT_SASI false // Enable SASI compatiblity for Sharp X68000

111
src/control.ino Normal file
View File

@ -0,0 +1,111 @@
#include "config.h"
#include "scsi_defs.h"
#if SUPPORT_CONTROL
/*
* RECEIVE Command processing.
*/
void onControlReceiveCommand(uint32_t adds, uint32_t len)
{
LOG("-R ");
LOGHEX4N(len);
if(!m_sel) {
m_sts |= STATUS_CHECK;
m_phase = PHASE_STATUSIN;
return;
}
switch(m_cmd[1] & 0x3) {
case 0:
if(len == 0) return;
break;
case 1: // Fixed
break;
case 2: // SILI
break;
case 3: // Illegal Request
m_sts = 0x02;
m_sel->m_sense.m_key = ILLEGAL_REQUEST;
m_sel->m_sense.m_code = INVALID_FIELD_IN_CDB; /* "Invalid field in CDB" */
m_sel->m_sense.m_key_specific[0] = ERROR_IN_OPCODE; /* "Error in Byte 1" */
m_sel->m_sense.m_key_specific[1] = 0x00;
m_sel->m_sense.m_key_specific[2] = 0x01;
m_phase = PHASE_STATUSIN;
return;
}
LED_ON();
writeDataPhase(len, m_responsebuffer);
LED_OFF();
m_phase = PHASE_STATUSIN;
}
/*
* SEND Command processing.
*/
void onControlSendCommand(uint32_t adds, uint32_t len)
{
LOG("-W ");
LOGHEX4N(len);
if(!m_sel) {
m_sts |= STATUS_CHECK;
m_phase = PHASE_STATUSIN;
return;
}
if(len > MAX_BLOCKSIZE) {
m_sel->m_sense.m_key = ILLEGAL_REQUEST;
m_sel->m_sense.m_code = INVALID_FIELD_IN_CDB; /* "Invalid field in CDB" */
m_sel->m_sense.m_key_specific[0] = ERROR_IN_OPCODE; /* "Error in Byte 4" */
m_sel->m_sense.m_key_specific[1] = 0x00;
m_sel->m_sense.m_key_specific[2] = 0x04;
m_sts |= STATUS_CHECK;
m_phase = PHASE_STATUSIN;
return;
}
LED_ON();
readDataPhase(len, m_responsebuffer);
LED_OFF();
m_phase = PHASE_STATUSIN;
}
void ControlReceive6CommandHandler() {
LOG("[Receive6]");
onControlReceiveCommand((((uint32_t)m_cmd[1] & 0x1F) << 16) | ((uint32_t)m_cmd[2] << 8) | m_cmd[3], (m_cmd[4] == 0) ? 0x100 : m_cmd[4]);
}
void ControlSend6CommandHandler() {
LOG("[Send6]");
onControlSendCommand((((uint32_t)m_cmd[1] & 0x1F) << 16) | ((uint32_t)m_cmd[2] << 8) | m_cmd[3], (m_cmd[4] == 0) ? 0x100 : m_cmd[4]);
}
void ConfigureControlHandlers(VirtualDevice_t *vdev) {
for(int c = 0; c < 256; c++)
vdev->m_handler[c] = &UnknownCommandHandler;
vdev->m_handler[CMD_TEST_UNIT_READY] = &TestUnitCommandHandler;
vdev->m_handler[CMD_REQUEST_SENSE] = &RequestSenseCommandHandler;
vdev->m_handler[CMD_READ6] = &ControlReceive6CommandHandler;
vdev->m_handler[CMD_WRITE6] = &ControlSend6CommandHandler;
vdev->m_handler[CMD_INQUIRY] = &InquiryCommandHandler;
vdev->m_handler[CMD_SEND_DIAGNOSTIC] = &SendDiagnosticCommandHandler;
}
// If config file exists, read the first three lines and copy the contents.
// File must be well formed or you will get junk in the SCSI Vendor fields.
void ConfigureControl(VirtualDevice_t *vdev, const char *image_name) {
for(int i = 0; SCSI_INQUIRY_RESPONSE[i][0] != 0xff; i++) {
if(SCSI_INQUIRY_RESPONSE[i][0] == DEV_PROCESSOR) {
memcpy(vdev->m_inquiryresponse, SCSI_INQUIRY_RESPONSE[i], SCSI_INQUIRY_RESPONSE_SIZE);
break;
}
}
vdev->m_type = DEV_PROCESSOR;
ConfigureControlHandlers(vdev);
}
#endif

20
src/defaults.ino
View File

@ -2,7 +2,7 @@
// SCSI Drive Vendor information
static uint8_t SCSI_INQUIRY_RESPONSE[][SCSI_INQUIRY_RESPONSE_SIZE] = {
uint8_t SCSI_INQUIRY_RESPONSE[][SCSI_INQUIRY_RESPONSE_SIZE] = {
#if SUPPORT_SASI
{
0x00, //Device type
@ -163,6 +163,24 @@ static uint8_t SCSI_INQUIRY_RESPONSE[][SCSI_INQUIRY_RESPONSE_SIZE] = {
},
#endif /* SUPPORT_TAPE */
#if SUPPORT_CONTROL
{
DEV_PROCESSOR, //device type
0x80, //RMB = 0
0x03, //ISO, ECMA, ANSI version
0x02, //Response data format
37 - 4, //Additional data length
0, //Reserve
0x00, // Support function
0x00, // Support function
'G', 'R', 'N', 'S', 'C', 'S', 'I', ' ', // vendor 8
'G', 'R', 'E', 'E', 'N', 'S', 'C', 'S', 'I', 'C', 'T','R', 'L', ' ', ' ', ' ', // product 16
'G', 'S', 'C', '0', // version 4
0
},
#endif /* SUPPORT_CONTROL */
// Invalid entry to mark end of data
{
0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00,

7
src/scsi_defs.h
View File

@ -93,7 +93,14 @@
*/
#define DEV_DISK 0x00
#define DEV_TAPE 0x01
#define DEV_PRINTER 0x02
#define DEV_PROCESSOR 0x03
#define DEV_WORM 0x04
#define DEV_OPTICAL 0x05
#define DEV_SCANNER 0x06
#define DEV_OMS 0x07
#define DEV_CHANGER 0x08
#define DEV_COMM 0x09
/*
* SCSI MESSAGE CODES