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Improved SCSI a bit.
Apple HD SC Setup still doesn't work, but it won't crash anymore. Non-existent SCSI devices can no longer be selected
This commit is contained in:
Peter Rutenbar
parent
ea23ef3ac6
commit
20fedf386b
121
core/scsi.c
121
core/scsi.c
@ -310,45 +310,21 @@ static void scsi_buf_set (uint8_t byte)
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switch_status_phase(0); // switch to the status phase, with a status byte of 0
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break;
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case 0x15: // mode select (6)
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slog("scsi_buf_set: responding to mode-select\n");
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switch_status_phase(0);
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break;
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case 0x25: // read capacity (10)
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slog("scsi_buf_set: responding to read-capacity\n");
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// bytes [0,3] -> BE number of blocks
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shoe.scsi.buf[0] = (dev->num_blocks >> 24) & 0xff;
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shoe.scsi.buf[1] = (dev->num_blocks >> 16) & 0xff;
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shoe.scsi.buf[2] = (dev->num_blocks >> 8) & 0xff;
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shoe.scsi.buf[3] = (dev->num_blocks) & 0xff;
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// bytes [4,7] -> BE block size (needs to be 512)
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shoe.scsi.buf[4] = (dev->block_size >> 24) & 0xff;
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shoe.scsi.buf[5] = (dev->block_size >> 16) & 0xff;
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shoe.scsi.buf[6] = (dev->block_size >> 8) & 0xff;
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shoe.scsi.buf[7] = (dev->block_size) & 0xff;
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shoe.scsi.in_i = 0;
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shoe.scsi.in_len = 8;
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switch_data_in_phase();
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break;
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case 0x12: { // inquiry command (6)
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slog("scsi_buf_set: responding to inquiry\n");
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case 0x3: { // request sense (6)
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const uint8_t alloc_len = shoe.scsi.buf[4];
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const uint8_t control = shoe.scsi.buf[5];
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const _Bool desc = shoe.scsi.buf[1] & 1;
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switch_status_phase(2); // CHECK_CONDITION
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scsi_handle_inquiry_command(alloc_len);
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break;
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}
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case 0x8: { // read (6)
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const uint32_t offset =
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(shoe.scsi.buf[1] << 16) |
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(shoe.scsi.buf[2] << 8 ) |
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(shoe.scsi.buf[3]);
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(shoe.scsi.buf[1] << 16) |
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(shoe.scsi.buf[2] << 8 ) |
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(shoe.scsi.buf[3]);
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const uint16_t len = (shoe.scsi.buf[4]==0) ? 0x100 : shoe.scsi.buf[4]; // len==0 -> 256 sectors
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assert(dev->f);
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@ -374,12 +350,12 @@ static void scsi_buf_set (uint8_t byte)
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switch_data_in_phase();
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break;
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}
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case 0xa: { // write (6)
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const uint32_t offset =
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(shoe.scsi.buf[1] << 16) |
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(shoe.scsi.buf[2] << 8 ) |
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(shoe.scsi.buf[3]);
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(shoe.scsi.buf[1] << 16) |
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(shoe.scsi.buf[2] << 8 ) |
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(shoe.scsi.buf[3]);
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const uint16_t len = (shoe.scsi.buf[4]==0) ? 0x100 : shoe.scsi.buf[4]; // len==0 -> 256 sectors
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slog("scsi_buf_set: Responding to write at off=%u len=%u\n", offset, len);
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@ -394,9 +370,70 @@ static void scsi_buf_set (uint8_t byte)
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switch_data_out_phase();
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break;
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}
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case 0x12: { // inquiry command (6)
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slog("scsi_buf_set: responding to inquiry\n");
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const uint8_t alloc_len = shoe.scsi.buf[4];
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scsi_handle_inquiry_command(alloc_len);
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break;
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}
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case 0x15: // mode select (6)
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slog("scsi_buf_set: responding to mode-select\n");
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switch_status_phase(0);
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break;
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case 0x1a: { // mode sense (6)
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const _Bool dbd = (shoe.scsi.buf[1] >> 3) & 1;
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const uint8_t pc = (shoe.scsi.buf[2] >> 6) & 3;
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const uint8_t page_code = shoe.scsi.buf[2] & 0x3f;
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const uint8_t subpage_code = shoe.scsi.buf[3];
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const uint8_t alloc_len = shoe.scsi.buf[4];
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const uint8_t control = shoe.scsi.buf[6];
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slog("scsi_bug_set: responding to mode-sense\n");
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slog("dbd=%u pc=%u page_code=%u subpage_code=%u alloc_len=%u control=%u\n",
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dbd, pc, page_code, subpage_code, alloc_len, control);
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// FIXME: set sense code!
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switch_status_phase(2); // CHECK_CONDITION
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}
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case 0x25: // read capacity (10)
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slog("scsi_buf_set: responding to read-capacity\n");
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// bytes [0,3] -> BE number of blocks
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shoe.scsi.buf[0] = (dev->num_blocks >> 24) & 0xff;
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shoe.scsi.buf[1] = (dev->num_blocks >> 16) & 0xff;
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shoe.scsi.buf[2] = (dev->num_blocks >> 8) & 0xff;
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shoe.scsi.buf[3] = (dev->num_blocks) & 0xff;
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// bytes [4,7] -> BE block size (needs to be 512)
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shoe.scsi.buf[4] = (dev->block_size >> 24) & 0xff;
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shoe.scsi.buf[5] = (dev->block_size >> 16) & 0xff;
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shoe.scsi.buf[6] = (dev->block_size >> 8) & 0xff;
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shoe.scsi.buf[7] = (dev->block_size) & 0xff;
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shoe.scsi.in_i = 0;
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shoe.scsi.in_len = 8;
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switch_data_in_phase();
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break;
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case 0x28: { // read (10)
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// FIXME: set sense code!
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switch_status_phase(2); // CHECK_CONDITION
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break;
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}
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default:
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assert(!"unknown commmand!");
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printf("unknown scsi command (0x%02x)\n", shoe.scsi.buf[0]);
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// FIXME: set sense code
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switch_status_phase(2); // CHECK_CONDITION
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break;
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}
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@ -548,8 +585,14 @@ void scsi_reg_write ()
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assert(id != 8);
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shoe.scsi.target_id = id;
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slog("scsi_reg_write: selected target id %u\n", id);
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shoe.scsi.target_bsy = 1; // target asserts BSY to acknowledge being selected
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shoe.scsi.phase = SELECTION;
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if (shoe.scsi_devices[shoe.scsi.target_id].f == NULL) {
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shoe.scsi.phase = BUS_FREE;
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}
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else {
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shoe.scsi.target_bsy = 1; // target asserts BSY to acknowledge being selected
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shoe.scsi.phase = SELECTION;
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}
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break;
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}
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