1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2001 4 * Denis Peter, MPL AG Switzerland 5 */ 6 #ifndef _SCSI_H 7 #define _SCSI_H 8 9 #include <asm/cache.h> 10 #include <linux/dma-direction.h> 11 12 struct udevice; 13 14 struct scsi_cmd { 15 unsigned char cmd[16]; /* command */ 16 /* for request sense */ 17 unsigned char sense_buf[64] 18 __attribute__((aligned(ARCH_DMA_MINALIGN))); 19 unsigned char status; /* SCSI Status */ 20 unsigned char target; /* Target ID */ 21 unsigned char lun; /* Target LUN */ 22 unsigned char cmdlen; /* command len */ 23 unsigned long datalen; /* Total data length */ 24 unsigned char * pdata; /* pointer to data */ 25 unsigned char msgout[12]; /* Messge out buffer (NOT USED) */ 26 unsigned char msgin[12]; /* Message in buffer */ 27 unsigned char sensecmdlen; /* Sense command len */ 28 unsigned long sensedatalen; /* Sense data len */ 29 unsigned char sensecmd[6]; /* Sense command */ 30 unsigned long contr_stat; /* Controller Status */ 31 unsigned long trans_bytes; /* tranfered bytes */ 32 33 unsigned int priv; 34 enum dma_data_direction dma_dir; 35 }; 36 37 /*----------------------------------------------------------- 38 ** 39 ** SCSI constants. 40 ** 41 **----------------------------------------------------------- 42 */ 43 44 /* 45 ** Messages 46 */ 47 48 #define M_COMPLETE (0x00) 49 #define M_EXTENDED (0x01) 50 #define M_SAVE_DP (0x02) 51 #define M_RESTORE_DP (0x03) 52 #define M_DISCONNECT (0x04) 53 #define M_ID_ERROR (0x05) 54 #define M_ABORT (0x06) 55 #define M_REJECT (0x07) 56 #define M_NOOP (0x08) 57 #define M_PARITY (0x09) 58 #define M_LCOMPLETE (0x0a) 59 #define M_FCOMPLETE (0x0b) 60 #define M_RESET (0x0c) 61 #define M_ABORT_TAG (0x0d) 62 #define M_CLEAR_QUEUE (0x0e) 63 #define M_INIT_REC (0x0f) 64 #define M_REL_REC (0x10) 65 #define M_TERMINATE (0x11) 66 #define M_SIMPLE_TAG (0x20) 67 #define M_HEAD_TAG (0x21) 68 #define M_ORDERED_TAG (0x22) 69 #define M_IGN_RESIDUE (0x23) 70 #define M_IDENTIFY (0x80) 71 72 #define M_X_MODIFY_DP (0x00) 73 #define M_X_SYNC_REQ (0x01) 74 #define M_X_WIDE_REQ (0x03) 75 #define M_X_PPR_REQ (0x04) 76 77 78 /* 79 ** Status 80 */ 81 82 #define S_GOOD (0x00) 83 #define S_CHECK_COND (0x02) 84 #define S_COND_MET (0x04) 85 #define S_BUSY (0x08) 86 #define S_INT (0x10) 87 #define S_INT_COND_MET (0x14) 88 #define S_CONFLICT (0x18) 89 #define S_TERMINATED (0x20) 90 #define S_QUEUE_FULL (0x28) 91 #define S_ILLEGAL (0xff) 92 #define S_SENSE (0x80) 93 94 /* 95 * Sense_keys 96 */ 97 98 #define SENSE_NO_SENSE 0x0 99 #define SENSE_RECOVERED_ERROR 0x1 100 #define SENSE_NOT_READY 0x2 101 #define SENSE_MEDIUM_ERROR 0x3 102 #define SENSE_HARDWARE_ERROR 0x4 103 #define SENSE_ILLEGAL_REQUEST 0x5 104 #define SENSE_UNIT_ATTENTION 0x6 105 #define SENSE_DATA_PROTECT 0x7 106 #define SENSE_BLANK_CHECK 0x8 107 #define SENSE_VENDOR_SPECIFIC 0x9 108 #define SENSE_COPY_ABORTED 0xA 109 #define SENSE_ABORTED_COMMAND 0xB 110 #define SENSE_VOLUME_OVERFLOW 0xD 111 #define SENSE_MISCOMPARE 0xE 112 113 114 #define SCSI_CHANGE_DEF 0x40 /* Change Definition (Optional) */ 115 #define SCSI_COMPARE 0x39 /* Compare (O) */ 116 #define SCSI_COPY 0x18 /* Copy (O) */ 117 #define SCSI_COP_VERIFY 0x3A /* Copy and Verify (O) */ 118 #define SCSI_INQUIRY 0x12 /* Inquiry (MANDATORY) */ 119 #define SCSI_LOG_SELECT 0x4C /* Log Select (O) */ 120 #define SCSI_LOG_SENSE 0x4D /* Log Sense (O) */ 121 #define SCSI_MODE_SEL6 0x15 /* Mode Select 6-byte (Device Specific) */ 122 #define SCSI_MODE_SEL10 0x55 /* Mode Select 10-byte (Device Specific) */ 123 #define SCSI_MODE_SEN6 0x1A /* Mode Sense 6-byte (Device Specific) */ 124 #define SCSI_MODE_SEN10 0x5A /* Mode Sense 10-byte (Device Specific) */ 125 #define SCSI_READ_BUFF 0x3C /* Read Buffer (O) */ 126 #define SCSI_REQ_SENSE 0x03 /* Request Sense (MANDATORY) */ 127 #define SCSI_SEND_DIAG 0x1D /* Send Diagnostic (O) */ 128 #define SCSI_TST_U_RDY 0x00 /* Test Unit Ready (MANDATORY) */ 129 #define SCSI_WRITE_BUFF 0x3B /* Write Buffer (O) */ 130 /*************************************************************************** 131 * %%% Commands Unique to Direct Access Devices %%% 132 ***************************************************************************/ 133 #define SCSI_COMPARE 0x39 /* Compare (O) */ 134 #define SCSI_FORMAT 0x04 /* Format Unit (MANDATORY) */ 135 #define SCSI_LCK_UN_CAC 0x36 /* Lock Unlock Cache (O) */ 136 #define SCSI_PREFETCH 0x34 /* Prefetch (O) */ 137 #define SCSI_MED_REMOVL 0x1E /* Prevent/Allow medium Removal (O) */ 138 #define SCSI_READ6 0x08 /* Read 6-byte (MANDATORY) */ 139 #define SCSI_READ10 0x28 /* Read 10-byte (MANDATORY) */ 140 #define SCSI_READ16 0x48 141 #define SCSI_RD_CAPAC 0x25 /* Read Capacity (MANDATORY) */ 142 #define SCSI_RD_CAPAC10 SCSI_RD_CAPAC /* Read Capacity (10) */ 143 #define SCSI_RD_CAPAC16 0x9e /* Read Capacity (16) */ 144 #define SCSI_RD_DEFECT 0x37 /* Read Defect Data (O) */ 145 #define SCSI_READ_LONG 0x3E /* Read Long (O) */ 146 #define SCSI_REASS_BLK 0x07 /* Reassign Blocks (O) */ 147 #define SCSI_RCV_DIAG 0x1C /* Receive Diagnostic Results (O) */ 148 #define SCSI_RELEASE 0x17 /* Release Unit (MANDATORY) */ 149 #define SCSI_REZERO 0x01 /* Rezero Unit (O) */ 150 #define SCSI_SRCH_DAT_E 0x31 /* Search Data Equal (O) */ 151 #define SCSI_SRCH_DAT_H 0x30 /* Search Data High (O) */ 152 #define SCSI_SRCH_DAT_L 0x32 /* Search Data Low (O) */ 153 #define SCSI_SEEK6 0x0B /* Seek 6-Byte (O) */ 154 #define SCSI_SEEK10 0x2B /* Seek 10-Byte (O) */ 155 #define SCSI_SEND_DIAG 0x1D /* Send Diagnostics (MANDATORY) */ 156 #define SCSI_SET_LIMIT 0x33 /* Set Limits (O) */ 157 #define SCSI_START_STP 0x1B /* Start/Stop Unit (O) */ 158 #define SCSI_SYNC_CACHE 0x35 /* Synchronize Cache (O) */ 159 #define SCSI_VERIFY 0x2F /* Verify (O) */ 160 #define SCSI_WRITE6 0x0A /* Write 6-Byte (MANDATORY) */ 161 #define SCSI_WRITE10 0x2A /* Write 10-Byte (MANDATORY) */ 162 #define SCSI_WRT_VERIFY 0x2E /* Write and Verify (O) */ 163 #define SCSI_WRITE_LONG 0x3F /* Write Long (O) */ 164 #define SCSI_WRITE_SAME 0x41 /* Write Same (O) */ 165 166 /** 167 * struct scsi_plat - stores information about SCSI controller 168 * 169 * @base: Controller base address 170 * @max_lun: Maximum number of logical units 171 * @max_id: Maximum number of target ids 172 * @max_bytes_per_req: Maximum number of bytes per read/write request 173 */ 174 struct scsi_plat { 175 unsigned long base; 176 unsigned long max_lun; 177 unsigned long max_id; 178 unsigned long max_bytes_per_req; 179 }; 180 181 /* Operations for SCSI */ 182 struct scsi_ops { 183 /** 184 * exec() - execute a command 185 * 186 * @dev: SCSI bus 187 * @cmd: Command to execute 188 * @return 0 if OK, -ve on error 189 */ 190 int (*exec)(struct udevice *dev, struct scsi_cmd *cmd); 191 192 /** 193 * bus_reset() - reset the bus 194 * 195 * @dev: SCSI bus to reset 196 * @return 0 if OK, -ve on error 197 */ 198 int (*bus_reset)(struct udevice *dev); 199 }; 200 201 #define scsi_get_ops(dev) ((struct scsi_ops *)(dev)->driver->ops) 202 203 extern struct scsi_ops scsi_ops; 204 205 /** 206 * scsi_exec() - execute a command 207 * 208 * @dev: SCSI bus 209 * @cmd: Command to execute 210 * @return 0 if OK, -ve on error 211 */ 212 int scsi_exec(struct udevice *dev, struct scsi_cmd *cmd); 213 214 /** 215 * scsi_bus_reset() - reset the bus 216 * 217 * @dev: SCSI bus to reset 218 * @return 0 if OK, -ve on error 219 */ 220 int scsi_bus_reset(struct udevice *dev); 221 222 /** 223 * scsi_scan() - Scan all SCSI controllers for available devices 224 * 225 * @vebose: true to show information about each device found 226 */ 227 int scsi_scan(bool verbose); 228 229 /** 230 * scsi_scan_dev() - scan a SCSI bus and create devices 231 * 232 * @dev: SCSI bus 233 * @verbose: true to show information about each device found 234 */ 235 int scsi_scan_dev(struct udevice *dev, bool verbose); 236 237 #ifndef CONFIG_DM_SCSI 238 void scsi_low_level_init(int busdevfunc); 239 void scsi_init(void); 240 #endif 241 242 #define SCSI_IDENTIFY 0xC0 /* not used */ 243 244 /* Hardware errors */ 245 #define SCSI_SEL_TIME_OUT 0x00000101 /* Selection time out */ 246 #define SCSI_HNS_TIME_OUT 0x00000102 /* Handshake */ 247 #define SCSI_MA_TIME_OUT 0x00000103 /* Phase error */ 248 #define SCSI_UNEXP_DIS 0x00000104 /* unexpected disconnect */ 249 250 #define SCSI_INT_STATE 0x00010000 /* unknown Interrupt number is stored in 16 LSB */ 251 252 #endif /* _SCSI_H */ 253