1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Denis Peter, MPL AG Switzerland
10 #include <linux/dma-direction.h>
12 /* Fix this to the maximum */
13 #define SCSI_MAX_DEVICE \
14 (CONFIG_SYS_SCSI_MAX_SCSI_ID * CONFIG_SYS_SCSI_MAX_LUN)
19 * struct scsi_cmd - information about a SCSI command to be processed
22 * @sense_buf: for request sense
23 * @status: SCSI Status
26 * @cmdlen: command len
27 * @datalen: Total data length
28 * @pdata: pointer to data
29 * @msgout: Messge out buffer (NOT USED)
30 * @msgin: Message in buffer
31 * @sensecmdlen: Sense command len
32 * @sensedatalen: Sense data len
33 * @sensecmd: Sense command
34 * @contr_stat: Controller Status
35 * @trans_bytes: tranfered bytes
36 * @priv: Private value
37 * @dma_dir: Direction of data structure
40 unsigned char cmd[16];
41 unsigned char sense_buf[64]
42 __attribute__((aligned(ARCH_DMA_MINALIGN)));
47 unsigned long datalen;
49 unsigned char msgout[12];
50 unsigned char msgin[12];
51 unsigned char sensecmdlen;
52 unsigned long sensedatalen;
53 unsigned char sensecmd[6];
54 unsigned long contr_stat;
55 unsigned long trans_bytes;
58 enum dma_data_direction dma_dir;
61 /*-----------------------------------------------------------
65 **-----------------------------------------------------------
72 #define M_COMPLETE (0x00)
73 #define M_EXTENDED (0x01)
74 #define M_SAVE_DP (0x02)
75 #define M_RESTORE_DP (0x03)
76 #define M_DISCONNECT (0x04)
77 #define M_ID_ERROR (0x05)
78 #define M_ABORT (0x06)
79 #define M_REJECT (0x07)
81 #define M_PARITY (0x09)
82 #define M_LCOMPLETE (0x0a)
83 #define M_FCOMPLETE (0x0b)
84 #define M_RESET (0x0c)
85 #define M_ABORT_TAG (0x0d)
86 #define M_CLEAR_QUEUE (0x0e)
87 #define M_INIT_REC (0x0f)
88 #define M_REL_REC (0x10)
89 #define M_TERMINATE (0x11)
90 #define M_SIMPLE_TAG (0x20)
91 #define M_HEAD_TAG (0x21)
92 #define M_ORDERED_TAG (0x22)
93 #define M_IGN_RESIDUE (0x23)
94 #define M_IDENTIFY (0x80)
96 #define M_X_MODIFY_DP (0x00)
97 #define M_X_SYNC_REQ (0x01)
98 #define M_X_WIDE_REQ (0x03)
99 #define M_X_PPR_REQ (0x04)
106 #define S_GOOD (0x00)
107 #define S_CHECK_COND (0x02)
108 #define S_COND_MET (0x04)
109 #define S_BUSY (0x08)
111 #define S_INT_COND_MET (0x14)
112 #define S_CONFLICT (0x18)
113 #define S_TERMINATED (0x20)
114 #define S_QUEUE_FULL (0x28)
115 #define S_ILLEGAL (0xff)
116 #define S_SENSE (0x80)
122 #define SENSE_NO_SENSE 0x0
123 #define SENSE_RECOVERED_ERROR 0x1
124 #define SENSE_NOT_READY 0x2
125 #define SENSE_MEDIUM_ERROR 0x3
126 #define SENSE_HARDWARE_ERROR 0x4
127 #define SENSE_ILLEGAL_REQUEST 0x5
128 #define SENSE_UNIT_ATTENTION 0x6
129 #define SENSE_DATA_PROTECT 0x7
130 #define SENSE_BLANK_CHECK 0x8
131 #define SENSE_VENDOR_SPECIFIC 0x9
132 #define SENSE_COPY_ABORTED 0xA
133 #define SENSE_ABORTED_COMMAND 0xB
134 #define SENSE_VOLUME_OVERFLOW 0xD
135 #define SENSE_MISCOMPARE 0xE
138 #define SCSI_CHANGE_DEF 0x40 /* Change Definition (Optional) */
139 #define SCSI_COMPARE 0x39 /* Compare (O) */
140 #define SCSI_COPY 0x18 /* Copy (O) */
141 #define SCSI_COP_VERIFY 0x3A /* Copy and Verify (O) */
142 #define SCSI_INQUIRY 0x12 /* Inquiry (MANDATORY) */
143 #define SCSI_LOG_SELECT 0x4C /* Log Select (O) */
144 #define SCSI_LOG_SENSE 0x4D /* Log Sense (O) */
145 #define SCSI_MODE_SEL6 0x15 /* Mode Select 6-byte (Device Specific) */
146 #define SCSI_MODE_SEL10 0x55 /* Mode Select 10-byte (Device Specific) */
147 #define SCSI_MODE_SEN6 0x1A /* Mode Sense 6-byte (Device Specific) */
148 #define SCSI_MODE_SEN10 0x5A /* Mode Sense 10-byte (Device Specific) */
149 #define SCSI_READ_BUFF 0x3C /* Read Buffer (O) */
150 #define SCSI_REQ_SENSE 0x03 /* Request Sense (MANDATORY) */
151 #define SCSI_SEND_DIAG 0x1D /* Send Diagnostic (O) */
152 #define SCSI_TST_U_RDY 0x00 /* Test Unit Ready (MANDATORY) */
153 #define SCSI_WRITE_BUFF 0x3B /* Write Buffer (O) */
154 /***************************************************************************
155 * %%% Commands Unique to Direct Access Devices %%%
156 ***************************************************************************/
157 #define SCSI_COMPARE 0x39 /* Compare (O) */
158 #define SCSI_FORMAT 0x04 /* Format Unit (MANDATORY) */
159 #define SCSI_LCK_UN_CAC 0x36 /* Lock Unlock Cache (O) */
160 #define SCSI_PREFETCH 0x34 /* Prefetch (O) */
161 #define SCSI_MED_REMOVL 0x1E /* Prevent/Allow medium Removal (O) */
162 #define SCSI_READ6 0x08 /* Read 6-byte (MANDATORY) */
163 #define SCSI_READ10 0x28 /* Read 10-byte (MANDATORY) */
164 #define SCSI_READ16 0x48
165 #define SCSI_RD_CAPAC 0x25 /* Read Capacity (MANDATORY) */
166 #define SCSI_RD_CAPAC10 SCSI_RD_CAPAC /* Read Capacity (10) */
167 #define SCSI_RD_CAPAC16 0x9e /* Read Capacity (16) */
168 #define SCSI_RD_DEFECT 0x37 /* Read Defect Data (O) */
169 #define SCSI_READ_LONG 0x3E /* Read Long (O) */
170 #define SCSI_REASS_BLK 0x07 /* Reassign Blocks (O) */
171 #define SCSI_RCV_DIAG 0x1C /* Receive Diagnostic Results (O) */
172 #define SCSI_RELEASE 0x17 /* Release Unit (MANDATORY) */
173 #define SCSI_REZERO 0x01 /* Rezero Unit (O) */
174 #define SCSI_SRCH_DAT_E 0x31 /* Search Data Equal (O) */
175 #define SCSI_SRCH_DAT_H 0x30 /* Search Data High (O) */
176 #define SCSI_SRCH_DAT_L 0x32 /* Search Data Low (O) */
177 #define SCSI_SEEK6 0x0B /* Seek 6-Byte (O) */
178 #define SCSI_SEEK10 0x2B /* Seek 10-Byte (O) */
179 #define SCSI_SEND_DIAG 0x1D /* Send Diagnostics (MANDATORY) */
180 #define SCSI_SET_LIMIT 0x33 /* Set Limits (O) */
181 #define SCSI_START_STP 0x1B /* Start/Stop Unit (O) */
182 #define SCSI_SYNC_CACHE 0x35 /* Synchronize Cache (O) */
183 #define SCSI_VERIFY 0x2F /* Verify (O) */
184 #define SCSI_WRITE6 0x0A /* Write 6-Byte (MANDATORY) */
185 #define SCSI_WRITE10 0x2A /* Write 10-Byte (MANDATORY) */
186 #define SCSI_WRT_VERIFY 0x2E /* Write and Verify (O) */
187 #define SCSI_WRITE_LONG 0x3F /* Write Long (O) */
188 #define SCSI_WRITE_SAME 0x41 /* Write Same (O) */
191 * enum scsi_cmd_phase - current phase of the SCSI protocol
193 * @SCSIPH_START: Start phase
194 * @SCSIPH_DATA: Data phase
195 * @SCSIPH_STATUS: Status phase
197 enum scsi_cmd_phase {
204 * struct scsi_inquiry_resp - holds a SCSI inquiry command
206 * @type; command type
207 * @flags; command flags
208 * @version; command version
209 * @data_format; data format
210 * @additional_len; additional data length
211 * @spare[3]; spare bytes
212 * @vendor[8]; vendor information
213 * @product[16]; production information
214 * @revision[4]; revision information
216 struct scsi_inquiry_resp {
229 * struct scsi_read_capacity_resp - holds the response to a read-capacity cmd
231 * @last_block_addr: Logical block address of last block
232 * @block_len: Length of each block in bytes
234 struct scsi_read_capacity_resp {
240 * struct scsi_read10_req - holds a SCSI READ10 request
243 * @lun_flags; LUN flags
244 * @lba; Logical block address to start reading from
245 * @spare; spare bytes
246 * @xfer_len: number of blocks to read
247 * @spare2: more spare bytes
249 struct __packed scsi_read10_req {
259 * struct scsi_plat - stores information about SCSI controller
261 * @base: Controller base address
262 * @max_lun: Maximum number of logical units
263 * @max_id: Maximum number of target ids
264 * @max_bytes_per_req: Maximum number of bytes per read/write request
268 unsigned long max_lun;
269 unsigned long max_id;
270 unsigned long max_bytes_per_req;
273 /* Operations for SCSI */
276 * exec() - execute a command
279 * @cmd: Command to execute
280 * @return 0 if OK, -ve on error
282 int (*exec)(struct udevice *dev, struct scsi_cmd *cmd);
285 * bus_reset() - reset the bus
287 * @dev: SCSI bus to reset
288 * @return 0 if OK, -ve on error
290 int (*bus_reset)(struct udevice *dev);
293 #define scsi_get_ops(dev) ((struct scsi_ops *)(dev)->driver->ops)
295 extern struct scsi_ops scsi_ops;
298 * scsi_exec() - execute a command
301 * @cmd: Command to execute
302 * Return: 0 if OK, -ve on error
304 int scsi_exec(struct udevice *dev, struct scsi_cmd *cmd);
307 * scsi_bus_reset() - reset the bus
309 * @dev: SCSI bus to reset
310 * Return: 0 if OK, -ve on error
312 int scsi_bus_reset(struct udevice *dev);
315 * scsi_scan() - Scan all SCSI controllers for available devices
317 * @vebose: true to show information about each device found
319 int scsi_scan(bool verbose);
322 * scsi_scan_dev() - scan a SCSI bus and create devices
325 * @verbose: true to show information about each device found
327 int scsi_scan_dev(struct udevice *dev, bool verbose);
329 #ifndef CONFIG_DM_SCSI
330 void scsi_low_level_init(int busdevfunc);
331 void scsi_init(void);
334 #define SCSI_IDENTIFY 0xC0 /* not used */
336 /* Hardware errors */
337 #define SCSI_SEL_TIME_OUT 0x00000101 /* Selection time out */
338 #define SCSI_HNS_TIME_OUT 0x00000102 /* Handshake */
339 #define SCSI_MA_TIME_OUT 0x00000103 /* Phase error */
340 #define SCSI_UNEXP_DIS 0x00000104 /* unexpected disconnect */
342 #define SCSI_INT_STATE 0x00010000 /* unknown Interrupt number is stored in 16 LSB */