*/
#define ATAPI_PACKET_SIZE 12
+#define ATAPI_BLOCK_SIZE 2048
#include "atapi-types.h"
+
+/* ATAPI sucks...
+ * The OS will write to the cylinder register the number of bytes it wants to read
+ * however the device can change that value
+ *
+ */
+static int atapi_update_req_len(struct vm_device * dev, struct ide_channel * channel, uint_t xfer_len) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ // PrintDebug("Updating request length (pre=%d)\n", drive->req_len);
+
+ if (drive->req_len == 0) {
+ PrintError("ATAPI Error: request of length 0\n");
+ return -1;
+ }
+
+
+ channel->status.busy = 0;
+ channel->status.data_req = 1;
+ channel->status.error = 0;
+
+ drive->irq_flags.io_dir = 1;
+ drive->irq_flags.c_d = 0;
+
+ // make count even
+ if (drive->req_len % 2) {
+ drive->req_len -= 1;
+ }
+
+ // if the device can't return as much as the OS requested
+ if (drive->req_len > xfer_len) {
+ drive->req_len = xfer_len;
+ }
+
+ // PrintDebug("Updating request length (post=%d)\n", drive->req_len);
+
+ return 0;
+}
+
+
+
+// This is for simple commands that don't need to sanity check the req_len
+static void atapi_setup_cmd_resp(struct vm_device * dev, struct ide_channel * channel, uint_t xfer_len) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ drive->transfer_length = xfer_len;
+ drive->transfer_index = 0;
+ drive->req_len = drive->transfer_length;
+
+ drive->irq_flags.io_dir = 1;
+ drive->irq_flags.c_d = 0;
+
+ channel->status.busy = 0;
+ channel->status.data_req = 1;
+ channel->status.error = 0;
+
+ ide_raise_irq(dev, channel);
+}
+
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);
drive->cd_state.sense.sense_key = sense_key;
drive->cd_state.sense.asc = asc;
+
+ drive->irq_flags.io_dir = 1;
+ drive->irq_flags.c_d = 1;
+ drive->irq_flags.rel = 0;
+
ide_raise_irq(dev, channel);
}
static void atapi_cmd_nop(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
channel->status.busy = 0;
channel->status.ready = 1;
channel->status.data_req = 0;
channel->status.error = 0;
+ drive->irq_flags.io_dir = 1;
+ drive->irq_flags.c_d = 1;
+ drive->irq_flags.rel = 0;
+
ide_raise_irq(dev, channel);
}
return 0;
}
+
+static int atapi_update_data_buf(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+
+ switch (drive->cd_state.atapi_cmd) {
+ case 0x28: // read(10)
+ case 0xa8: // read(12)
+
+ // Update lba address to point to next block
+ drive->cd_state.current_lba++;
+
+ // read the next block
+ return atapi_read_chunk(dev, channel);
+
+ default:
+ PrintError("Unhandled ATAPI command in update buffer %x\n", drive->cd_state.atapi_cmd);
+ 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);
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);
- }
+ ide_raise_irq(dev, channel);
+ return 0;}
+
+ // PrintDebug("Reading %d blocks from LBA 0x%x\n", xfer_len, lba);
drive->cd_state.current_lba = lba;
+ // Update the request length value in the cylinder registers
if (atapi_read_chunk(dev, channel) == -1) {
PrintError("IDE: Could not read initial chunk from CD\n");
- return -1;
+ return -1;
}
- drive->transfer_length = xfer_len;
+ drive->transfer_length = xfer_len * ATAPI_BLOCK_SIZE;
drive->transfer_index = 0;
- channel->status.busy = 0;
- channel->status.data_req = 1;
- channel->status.error = 0;
+ // Length of ATAPI buffer sits in cylinder registers
+ // This is weird... The host sets this value to say what it would like to transfer,
+ // if it is larger than the correct size, the device shrinks it to the correct size
+ if (atapi_update_req_len(dev, channel, ATAPI_BLOCK_SIZE) == -1) {
+ PrintError("Could not update initial request length\n");
+ return -1;
+ }
ide_raise_irq(dev, channel);
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));
+ atapi_setup_cmd_resp(dev, channel, 18);
+}
+
+
+
+static int atapi_get_capacity(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ struct atapi_rd_capacity_resp * resp = (struct atapi_rd_capacity_resp *)(drive->data_buf);
+ uint32_t capacity = drive->cd_ops->get_capacity(drive->private_data);
+
+ resp->lba = le_to_be_32(capacity);
+ resp->block_len = le_to_be_32(ATAPI_BLOCK_SIZE);
+
+ atapi_setup_cmd_resp(dev, channel, sizeof(struct atapi_rd_capacity_resp));
+
+ return 0;
+}
+
+
+static int atapi_read_toc(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ struct atapi_rd_toc_cmd * cmd = (struct atapi_rd_toc_cmd *)(drive->data_buf);
+ uint16_t alloc_len = be_to_le_16(cmd->alloc_len);
+
+
+ struct atapi_rd_toc_resp * resp = (struct atapi_rd_toc_resp *)(drive->data_buf);
+
+ resp->data_len = 10;
+
+ return -1;
+
+}
+
+
+static int atapi_mode_sense_cur_values(struct vm_device * dev, struct ide_channel * channel,
+ struct atapi_mode_sense_cmd * sense_cmd) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ struct atapi_mode_sense_hdr * hdr = (struct atapi_mode_sense_hdr *)(drive->data_buf);
+ uint_t resp_len = sizeof(struct atapi_mode_sense_hdr);
+ uint16_t alloc_len = be_to_le_16(sense_cmd->alloc_len);
+ PrintDebug("Page Code: %x\n", sense_cmd->page_code);
+ PrintDebug("Alloc len: %d\n", alloc_len);
+
+ switch (sense_cmd->page_code) {
+
+ case 0x01: { // error recovery
+ struct atapi_error_recovery * err = NULL;
+ err = (struct atapi_error_recovery *)(drive->data_buf +
+ sizeof(struct atapi_mode_sense_hdr));
+
+ memcpy(err, &(drive->cd_state.err_recovery), sizeof(struct atapi_error_recovery));
+
+ resp_len += sizeof(struct atapi_error_recovery);
+
+ hdr->mode_data_len = le_to_be_16(resp_len - 2);
+
+ break;
+ }
+ case 0x2a: { // CDROM caps and mech. status
+ struct atapi_cdrom_caps * caps = NULL;
+ caps = (struct atapi_cdrom_caps *)(drive->data_buf + sizeof(struct atapi_mode_sense_hdr));
+
+
+ memset(caps, 0, sizeof(struct atapi_cdrom_caps));
+
+ resp_len += sizeof(struct atapi_cdrom_caps);
+
+ hdr->mode_data_len = le_to_be_16(resp_len - 2);
+
+ caps->page_code = 0x2a;
+ caps->page_len = 0x12;
+ caps->mode2_form1 = 1;
+ caps->mode2_form2 = 1;
+ caps->multisession = 1;
+ caps->isrc = 1;
+ caps->upc = 1;
+
+ /* JRL TODO: These are dynamic caps */
+ caps->lock = 1;
+ caps->lock_state = 0;
+ caps->eject = 1;
+
+ caps->lmt = 1;
+ caps->obsolete1 = le_to_be_16(0x2c2);
+ caps->num_vols_supp = le_to_be_16(2);
+
+ caps->lun_buf_size = le_to_be_16(512);
+ caps->obsolete2 = le_to_be_16(0x2c2);
+
+ break;
+ }
+ case 0x0d:
+ case 0x0e:
+ case 0x3f:
+ default:
+ PrintError("ATAPI: Mode sense Page Code not supported (%x)\n", sense_cmd->page_code);
+ atapi_cmd_error(dev, channel, ATAPI_SEN_ILL_REQ, ASC_INV_CMD_FIELD);
+ ide_raise_irq(dev, channel);
+ return 0;
+ }
+
+
+ // We do this after error checking, because its only valid if everything worked
+ memset(hdr, 0, sizeof(struct atapi_mode_sense_hdr));
+ hdr->media_type_code = 0x70;
+
+ PrintDebug("resp_len=%d\n", resp_len);
+
+ drive->transfer_length = (resp_len > alloc_len) ? alloc_len : resp_len;
+ drive->transfer_index = 0;
+ atapi_update_req_len(dev, channel, drive->transfer_length);
+
ide_raise_irq(dev, channel);
+
+ return 0;
}
+
+static int atapi_mode_sense(struct vm_device * dev, struct ide_channel * channel) {
+ struct ide_drive * drive = get_selected_drive(channel);
+ struct atapi_mode_sense_cmd * sense_cmd = (struct atapi_mode_sense_cmd *)(drive->data_buf);
+
+ switch (sense_cmd->page_ctrl) {
+ case 0x00: // Current values
+ return atapi_mode_sense_cur_values(dev, channel, sense_cmd);
+ case 0x01: // Changeable values
+ case 0x02: // default values
+ case 0x03: // saved values
+ default:
+ PrintError("ATAPI: Mode sense mode not supported (%x)\n", sense_cmd->page_ctrl);
+ return -1;
+ }
+ return 0;
+}
+
+
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];
+ uint8_t cmd = drive->data_buf[0];
- PrintDebug("IDE: ATAPI Command %x\n", command);
+ PrintDebug("IDE: ATAPI Command %x\n", cmd);
- switch (command) {
+ drive->cd_state.atapi_cmd = cmd;
+
+ switch (cmd) {
case 0x00: // test unit ready
atapi_cmd_nop(dev, channel);
case 0x28: // read(10)
if (atapi_read10(dev, channel) == -1) {
- PrintError("IDE: Error in ATAPI read (%x)\n", command);
+ PrintError("IDE: Error in ATAPI read (%x)\n", cmd);
return -1;
}
+ break;
+ case 0x5a: // mode sense
+ if (atapi_mode_sense(dev, channel) == -1) {
+ PrintError("IDE: Error in ATAPI mode sense (%x)\n", cmd);
+ return -1;
+ }
break;
+
+
+ case 0x25: // read cdrom capacity
+ if (atapi_get_capacity(dev, channel) == -1) {
+ PrintError("IDE: Error getting CDROM capacity (%x)\n", cmd);
+ return -1;
+ }
+ break;
+
+
+ case 0x43: // read TOC
+ if (atapi_read_toc(dev, channel) == -1) {
+ PrintError("IDE: Error getting CDROM TOC (%x)\n", cmd);
+ 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 0x46: // ???
case 0x4a: // ???
default:
- PrintError("Unhandled ATAPI command %x\n", command);
+ PrintError("Unhandled ATAPI command %x\n", cmd);
atapi_cmd_error(dev, channel, ATAPI_SEN_ILL_REQ, ASC_INV_CMD_FIELD);
ide_raise_irq(dev, channel);
return -1;
drive->transfer_length = 512;
drive->transfer_index = 0;
+
+
memset(drive_id->buf, 0, sizeof(drive_id->buf));
drive_id->fixed_drive = 1;
