include/scsi.h

   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 /* Fix this to the maximum */
  13 #define SCSI_MAX_DEVICE \
  14         (CONFIG_SYS_SCSI_MAX_SCSI_ID * CONFIG_SYS_SCSI_MAX_LUN)
  15
  16 struct udevice;
  17
  18 /**
  19  * struct scsi_cmd - information about a SCSI command to be processed
  20  *
  21  * @cmd: command
  22  * @sense_buf: for request sense
  23  * @status: SCSI Status
  24  * @target: Target ID
  25  * @lun: Target LUN
  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
  38  */
  39 struct scsi_cmd {
  40         unsigned char cmd[16];
  41         unsigned char sense_buf[64]
  42                 __attribute__((aligned(ARCH_DMA_MINALIGN)));
  43         unsigned char status;
  44         unsigned char target;
  45         unsigned char lun;
  46         unsigned char cmdlen;
  47         unsigned long datalen;
  48         unsigned char *pdata;
  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;
  56
  57         unsigned int priv;
  58         enum dma_data_direction dma_dir;
  59 };
  60
  61 /*-----------------------------------------------------------
  62 **
  63 **      SCSI  constants.
  64 **
  65 **-----------------------------------------------------------
  66 */
  67
  68 /*
  69 **      Messages
  70 */
  71
  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)
  80 #define M_NOOP          (0x08)
  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)
  95
  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)
 100
 101
 102 /*
 103 **      Status
 104 */
 105
 106 #define S_GOOD          (0x00)
 107 #define S_CHECK_COND    (0x02)
 108 #define S_COND_MET      (0x04)
 109 #define S_BUSY          (0x08)
 110 #define S_INT           (0x10)
 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)
 117
 118 /*
 119  * Sense_keys
 120  */
 121
 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
 136
 137
 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) */
 189
 190 /**
 191  * struct scsi_plat - stores information about SCSI controller
 192  *
 193  * @base: Controller base address
 194  * @max_lun: Maximum number of logical units
 195  * @max_id: Maximum number of target ids
 196  * @max_bytes_per_req: Maximum number of bytes per read/write request
 197  */
 198 struct scsi_plat {
 199         unsigned long base;
 200         unsigned long max_lun;
 201         unsigned long max_id;
 202         unsigned long max_bytes_per_req;
 203 };
 204
 205 /* Operations for SCSI */
 206 struct scsi_ops {
 207         /**
 208          * exec() - execute a command
 209          *
 210          * @dev:        SCSI bus
 211          * @cmd:        Command to execute
 212          * @return 0 if OK, -ve on error
 213          */
 214         int (*exec)(struct udevice *dev, struct scsi_cmd *cmd);
 215
 216         /**
 217          * bus_reset() - reset the bus
 218          *
 219          * @dev:        SCSI bus to reset
 220          * @return 0 if OK, -ve on error
 221          */
 222         int (*bus_reset)(struct udevice *dev);
 223 };
 224
 225 #define scsi_get_ops(dev)        ((struct scsi_ops *)(dev)->driver->ops)
 226
 227 extern struct scsi_ops scsi_ops;
 228
 229 /**
 230  * scsi_exec() - execute a command
 231  *
 232  * @dev:        SCSI bus
 233  * @cmd:        Command to execute
 234  * Return: 0 if OK, -ve on error
 235  */
 236 int scsi_exec(struct udevice *dev, struct scsi_cmd *cmd);
 237
 238 /**
 239  * scsi_bus_reset() - reset the bus
 240  *
 241  * @dev:        SCSI bus to reset
 242  * Return: 0 if OK, -ve on error
 243  */
 244 int scsi_bus_reset(struct udevice *dev);
 245
 246 /**
 247  * scsi_scan() - Scan all SCSI controllers for available devices
 248  *
 249  * @vebose: true to show information about each device found
 250  */
 251 int scsi_scan(bool verbose);
 252
 253 /**
 254  * scsi_scan_dev() - scan a SCSI bus and create devices
 255  *
 256  * @dev:        SCSI bus
 257  * @verbose:    true to show information about each device found
 258  */
 259 int scsi_scan_dev(struct udevice *dev, bool verbose);
 260
 261 #ifndef CONFIG_DM_SCSI
 262 void scsi_low_level_init(int busdevfunc);
 263 void scsi_init(void);
 264 #endif
 265
 266 #define SCSI_IDENTIFY                                   0xC0  /* not used */
 267
 268 /* Hardware errors  */
 269 #define SCSI_SEL_TIME_OUT                        0x00000101      /* Selection time out */
 270 #define SCSI_HNS_TIME_OUT                        0x00000102  /* Handshake */
 271 #define SCSI_MA_TIME_OUT                         0x00000103  /* Phase error */
 272 #define SCSI_UNEXP_DIS                           0x00000104  /* unexpected disconnect */
 273
 274 #define SCSI_INT_STATE                           0x00010000  /* unknown Interrupt number is stored in 16 LSB */
 275
 276 #endif /* _SCSI_H */