--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#define ATAPI_PACKET_SIZE 12
+
+#include "atapi-types.h"
+
+static void atapi_cmd_error(struct vm_device * dev, struct ide_channel * channel,
+ atapi_sense_key_t sense_key, atapi_add_sense_code_t asc) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ // overload error register with ATAPI value
+ channel->error_reg.val = sense_key << 4;
+
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.write_fault = 0;
+ channel->status.data_req = 0;
+ channel->status.error = 1;
+
+ drive->cd_state.sense.header = 0xf0;
+ drive->cd_state.sense.rsvd1 = 0x00;
+ drive->cd_state.sense.read_len = 0x0a;
+ drive->cd_state.sense.sense_key = sense_key;
+ drive->cd_state.sense.asc = asc;
+
+ ide_raise_irq(dev, channel);
+}
+
+
+static void atapi_cmd_nop(struct vm_device * dev, struct ide_channel * channel) {
+ channel->status.busy = 0;
+ channel->status.ready = 1;
+ channel->status.data_req = 0;
+ channel->status.error = 0;
+
+ ide_raise_irq(dev, channel);
+}
+
+
+
+static int atapi_read_chunk(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ int ret = drive->cd_ops->read(drive->data_buf, drive->cd_state.current_lba, drive->private_data);
+
+ if (ret == -1) {
+ PrintError("IDE: Error reading CD block (LBA=%x)\n", drive->cd_state.current_lba);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int atapi_read10(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ struct atapi_read10_cmd * cmd = (struct atapi_read10_cmd *)(drive->data_buf);
+ uint32_t lba = be_to_le_32(cmd->lba);
+ uint16_t xfer_len = be_to_le_16(cmd->xfer_len);
+
+ /* Check if cd is ready
+ * if not: atapi_cmd_error(... ATAPI_SEN_NOT_RDY, ASC_MEDIA_NOT_PRESENT)
+ */
+
+ if (xfer_len == 0) {
+ atapi_cmd_nop(dev, channel);
+ return 0;
+ }
+
+ if ((lba + xfer_len) > drive->cd_ops->get_capacity(drive->private_data)) {
+ atapi_cmd_error(dev, channel, ATAPI_SEN_ILL_REQ, ASC_LOG_BLK_OOR);
+ }
+
+ drive->cd_state.current_lba = lba;
+
+
+ if (atapi_read_chunk(dev, channel) == -1) {
+ PrintError("IDE: Could not read initial chunk from CD\n");
+ return -1;
+ }
+
+ drive->transfer_length = xfer_len;
+ drive->transfer_index = 0;
+
+ channel->status.busy = 0;
+ channel->status.data_req = 1;
+ channel->status.error = 0;
+
+ ide_raise_irq(dev, channel);
+
+ return 0;
+}
+
+
+
+static void atapi_req_sense(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ drive->transfer_length = 18;
+ drive->transfer_index = 0;
+ memcpy(drive->data_buf, drive->cd_state.sense.buf, sizeof(drive->cd_state.sense.buf));
+
+ ide_raise_irq(dev, channel);
+}
+
+static int atapi_handle_packet(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ uint8_t command = drive->data_buf[0];
+
+ PrintDebug("IDE: ATAPI Command %x\n", command);
+
+ switch (command) {
+ case 0x00: // test unit ready
+ atapi_cmd_nop(dev, channel);
+
+ /* if drive not ready:
+ atapi_cmd_error(... ATAPI_SEN_NOT_RDY, ASC_MEDIA_NOT_PRESENT)
+ */
+ break;
+ case 0x03: // request sense
+ atapi_req_sense(dev, channel);
+ break;
+
+ case 0x28: // read(10)
+ if (atapi_read10(dev, channel) == -1) {
+ PrintError("IDE: Error in ATAPI read (%x)\n", command);
+ return -1;
+ }
+
+ break;
+ case 0xa8: // read(12)
+
+
+ case 0x1b: // start/stop drive
+ case 0xbd: // mechanism status
+ case 0x5a: // mode sense
+ case 0x12: // inquiry
+ case 0x25: // read cdrom capacity
+ case 0xbe: // read cd
+ case 0x43: // read TOC
+
+
+ case 0x2b: // seek
+ case 0x1e: // lock door
+ case 0x42: // read sub-channel
+ case 0x51: // read disk info
+
+
+ case 0x55: // mode select
+ case 0xa6: // load/unload cd
+ case 0x4b: // pause/resume
+ case 0x45: // play audio
+ case 0x47: // play audio msf
+ case 0xbc: // play cd
+ case 0xb9: // read cd msf
+ case 0x44: // read header
+ case 0xba: // scan
+ case 0xbb: // set cd speed
+ case 0x4e: // stop play/scan
+ case 0x46: // ???
+ case 0x4a: // ???
+ default:
+ PrintError("Unhandled ATAPI command %x\n", command);
+ atapi_cmd_error(dev, channel, ATAPI_SEN_ILL_REQ, ASC_INV_CMD_FIELD);
+ ide_raise_irq(dev, channel);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+static void atapi_identify_device(struct ide_drive * drive) {
+ struct ide_drive_id * drive_id = (struct ide_drive_id *)(drive->data_buf);
+ const char* serial_number = " VT00001\0\0\0\0\0\0\0\0\0\0\0\0";
+ const char* firmware = "ALPHA1 ";
+
+ drive->transfer_length = 512;
+ drive->transfer_index = 0;
+ memset(drive_id->buf, 0, sizeof(drive_id->buf));
+
+ drive_id->fixed_drive = 1;
+ drive_id->removable_media = 1;
+
+ // Black magic...
+ drive_id->disk_speed1 = 1;
+ drive_id->disk_speed3 = 1;
+
+ drive_id->cdrom_flag = 1;
+
+ // These buffers do not contain a terminating "\0"
+ memcpy(drive_id->serial_num, serial_number, strlen(serial_number));
+ memcpy(drive_id->firmware_rev, firmware, strlen(firmware));
+ memcpy(drive_id->model_num, drive->model, 40);
+
+ // 32 bits access
+ drive_id->dword_io = 1;
+
+ // enable LBA access
+ drive_id->lba_enable = 1;
+
+
+ // words 64-70, 54-58 valid
+ drive_id->buf[53] = 0x0003;
+
+ // copied from CFA540A
+ drive_id->buf[63] = 0x0103; // variable (DMA stuff)
+ drive_id->buf[64] = 0x0001; // PIO
+ drive_id->buf[65] = 0x00b4;
+ drive_id->buf[66] = 0x00b4;
+ drive_id->buf[67] = 0x012c;
+ drive_id->buf[68] = 0x00b4;
+
+ drive_id->buf[71] = 30; // faked
+ drive_id->buf[72] = 30; // faked
+
+ drive_id->buf[80] = 0x1e; // supports up to ATA/ATAPI-4
+}
