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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* SCSI definitions.
*/
#ifndef USB_MS_SCSI_H
#define USB_MS_SCSI_H
#define SCSI_MAX_LUN 0
/* Status values */
#define SCSI_STATUS_GOOD 0x00
#define SCSI_STATUS_CHECK_CONDITION 0x02
#define SCSI_STATUS_CONDITION_MET 0x04
#define SCSI_STATUS_BUSY 0x08
#define SCSI_STATUS_RESERVATION_CONFLICT 0x18
#define SCSI_STATUS_TASK_SET_FULL 0x28
#define SCSI_STATUS_ACA_ACTIVE 0x30
#define SCSI_STATUS_TASK_ABORTED 0x40
/* Not part of standard, indicates operation not complete*/
#define SCSI_STATUS_CONTINUE 0xFF
/* Sense key values */
#define SCSI_SENSE_NO_SENSE 0x0
#define SCSI_SENSE_RECOVERED_ERROR 0x1
#define SCSI_SENSE_NOT_READY 0x2
#define SCSI_SENSE_MEDIUM_ERROR 0x3
#define SCSI_SENSE_HARDWARE_ERROR 0x4
#define SCSI_SENSE_ILLEGAL_REQUEST 0x5
#define SCSI_SENSE_UNIT_ATTENTION 0x6
#define SCSI_SENSE_DATA_PROTECT 0x7
#define SCSI_SENSE_BLANK_CHECK 0x8
#define SCSI_SENSE_VENDOR_SPECIFIC 0x9
#define SCSI_SENSE_COPY_ABORTED 0xa
#define SCSI_SENSE_ABORTED_COMMAND 0xb
#define SCSI_SENSE_VOLUME_OVERFLOW 0xd
#define SCSI_SENSE_MISCOMPARE 0xe
#define SCSI_SENSE_COMPLETED 0xf
/* Additional sense code (ASC) and additional sense code qualifier (ASCQ)
* fields. Stored as ASC | ACSQ */
#define SCSI_SENSE_CODE_NONE ((0x00 << 4) | 0x00)
#define SCSI_SENSE_CODE_INVALID_COMMAND_OPERATION_CODE ((0x20 << 4) | 0x00)
#define SCSI_SENSE_CODE_INVALID_FIELD_IN_CDB ((0x24 << 4) | 0x00)
#define SCSI_SENSE_CODE_UNRECOVERED_READ_ERROR ((0x11 << 4) | 0x00)
#define SCSI_SENSE_CODE_NOT_READY ((0x04 << 4) | 0x00)
#define SCSI_SENSE_CODE_COMMAND_TO_LUN_FAILED ((0x6e << 4) | 0x00)
#define SCSI_SENSE_CODE_LBA_OUT_OF_RANGE ((0x21 << 4) | 0x00)
#define SCSI_SENSE_CODE_WRITE_PROTECTED ((0x27 << 4) | 0x00)
#define SCSI_SENSE_CODE_TIMEOUT ((0x3e) | 0x02)
#define SCSI_SENSE_CODE_ASC(x) ((x & 0xf0) >> 8)
#define SCSI_SENSE_CODE_ASCQ(x) (x & 0x0f)
/* Version descriptor values */
#define SCSI_VERSION_SBC3 0x04, 0xc0
#define SCSI_VERSION_SPC4 0x04, 0x60
/* Vital product data page codes */
#define SCSI_VPD_CODE_SUPPORTED_PAGES 0x00
#define SCSI_VPD_CODE_SERIAL_NUMBER 0x80
#define SCSI_VPD_CODE_DEVICE_ID 0x83
/* Mode pages */
#define SCSI_MODE_PAGE_ALL 0x3f
/* Response values for fixed-format sense data */
#define SCSI_SENSE_RESPONSE_CURRENT 0x70
#define SCSI_SENSE_RESPONSE_DEFERRED 0x71
/* Size of various SCSI data structures */
#define SCSI_CDB6_SIZE 6
#define SCSI_CDB10_SIZE 10
#define SCSI_CDB12_SIZE 12
/* Block size for LBA addressing */
#define SCSI_BLOCK_SIZE_BYTES (4 * 1024)
/* USB mass storage SCSI state machine */
enum usb_ms_scsi_state {
USB_MS_SCSI_STATE_IDLE,
USB_MS_SCSI_STATE_PARSE,
USB_MS_SCSI_STATE_DATA_IN,
USB_MS_SCSI_STATE_DATA_OUT,
USB_MS_SCSI_STATE_REPLY,
};
/* Structure defining sense key entry */
struct scsi_sense_entry {
uint8_t key; /* Sense Key */
uint8_t ASC; /* Additional Sense Code */
uint8_t ASCQ; /* Additional Sense Qualifier */
};
/* Structure defining read format capacities response */
struct scsi_capacity_list_response {
uint32_t header; /* Reserved | List Length */
uint32_t blocks; /* Number of Blocks */
uint32_t block_length; /* Reserved | Descriptor Code | Block Length */
};
/* USB endpoint buffers */
extern usb_uint ms_ep_tx[USB_MS_PACKET_SIZE] __usb_ram;
extern usb_uint ms_ep_rx[USB_MS_PACKET_SIZE] __usb_ram;
int scsi_parse(uint8_t *block, uint8_t length);
void scsi_reset(void);
#endif /* USB_MS_SCSI_H */
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