drivers/scsi/aic94xx/aic94xx_reg.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Aic94xx SAS/SATA driver hardware registers definitions.
   4  *
   5  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   6  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   7  */
   8
   9 #ifndef _AIC94XX_REG_H_
  10 #define _AIC94XX_REG_H_
  11
  12 #include <asm/io.h>
  13 #include "aic94xx_hwi.h"
  14
  15 /* Values */
  16 #define AIC9410_DEV_REV_B0            0x8
  17
  18 /* MBAR0, SWA, SWB, SWC, internal memory space addresses */
  19 #define REG_BASE_ADDR                 0xB8000000
  20 #define REG_BASE_ADDR_CSEQCIO         0xB8002000
  21 #define REG_BASE_ADDR_EXSI            0xB8042800
  22
  23 #define MBAR0_SWA_SIZE                0x58
  24 extern  u32    MBAR0_SWB_SIZE;
  25 #define MBAR0_SWC_SIZE                0x8
  26
  27 /* MBAR1, points to On Chip Memory */
  28 #define OCM_BASE_ADDR                 0xA0000000
  29 #define OCM_MAX_SIZE                  0x20000
  30
  31 /* Smallest address possible to reference */
  32 #define ALL_BASE_ADDR                 OCM_BASE_ADDR
  33
  34 /* PCI configuration space registers */
  35 #define PCI_IOBAR_OFFSET              4
  36
  37 #define PCI_CONF_MBAR1                0x6C
  38 #define PCI_CONF_MBAR0_SWA            0x70
  39 #define PCI_CONF_MBAR0_SWB            0x74
  40 #define PCI_CONF_MBAR0_SWC            0x78
  41 #define PCI_CONF_MBAR_KEY             0x7C
  42 #define PCI_CONF_FLSH_BAR             0xB8
  43
  44 #include "aic94xx_reg_def.h"
  45
  46 u8  asd_read_reg_byte(struct asd_ha_struct *asd_ha, u32 reg);
  47 u16 asd_read_reg_word(struct asd_ha_struct *asd_ha, u32 reg);
  48 u32 asd_read_reg_dword(struct asd_ha_struct *asd_ha, u32 reg);
  49
  50 void asd_write_reg_byte(struct asd_ha_struct *asd_ha, u32 reg, u8 val);
  51 void asd_write_reg_word(struct asd_ha_struct *asd_ha, u32 reg, u16 val);
  52 void asd_write_reg_dword(struct asd_ha_struct *asd_ha, u32 reg, u32 val);
  53
  54 void asd_read_reg_string(struct asd_ha_struct *asd_ha, void *dst,
  55                          u32 offs, int count);
  56 void asd_write_reg_string(struct asd_ha_struct *asd_ha, void *src,
  57                           u32 offs, int count);
  58
  59 #define ASD_READ_OCM(type, ord, S)                                    \
  60 static inline type asd_read_ocm_##ord (struct asd_ha_struct *asd_ha,  \
  61                                          u32 offs)                    \
  62 {                                                                     \
  63         struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[1];   \
  64         type val = read##S (io_handle->addr + (unsigned long) offs);  \
  65         rmb();                                                        \
  66         return val;                                                   \
  67 }
  68
  69 ASD_READ_OCM(u8, byte, b);
  70 ASD_READ_OCM(u16,word, w);
  71 ASD_READ_OCM(u32,dword,l);
  72
  73 #define ASD_WRITE_OCM(type, ord, S)                                    \
  74 static inline void asd_write_ocm_##ord (struct asd_ha_struct *asd_ha,  \
  75                                          u32 offs, type val)          \
  76 {                                                                     \
  77         struct asd_ha_addrspace *io_handle = &asd_ha->io_handle[1];   \
  78         write##S (val, io_handle->addr + (unsigned long) offs);       \
  79         return;                                                       \
  80 }
  81
  82 ASD_WRITE_OCM(u8, byte, b);
  83 ASD_WRITE_OCM(u16,word, w);
  84 ASD_WRITE_OCM(u32,dword,l);
  85
  86 #define ASD_DDBSITE_READ(type, ord)                                        \
  87 static inline type asd_ddbsite_read_##ord (struct asd_ha_struct *asd_ha,   \
  88                                            u16 ddb_site_no,                \
  89                                            u16 offs)                       \
  90 {                                                                          \
  91         asd_write_reg_word(asd_ha, ALTCIOADR, MnDDB_SITE + offs);          \
  92         asd_write_reg_word(asd_ha, ADDBPTR, ddb_site_no);                  \
  93         return asd_read_reg_##ord (asd_ha, CTXACCESS);                     \
  94 }
  95
  96 ASD_DDBSITE_READ(u32, dword);
  97 ASD_DDBSITE_READ(u16, word);
  98
  99 static inline u8 asd_ddbsite_read_byte(struct asd_ha_struct *asd_ha,
 100                                        u16 ddb_site_no,
 101                                        u16 offs)
 102 {
 103         if (offs & 1)
 104                 return asd_ddbsite_read_word(asd_ha, ddb_site_no,
 105                                              offs & ~1) >> 8;
 106         else
 107                 return asd_ddbsite_read_word(asd_ha, ddb_site_no,
 108                                              offs) & 0xFF;
 109 }
 110
 111
 112 #define ASD_DDBSITE_WRITE(type, ord)                                       \
 113 static inline void asd_ddbsite_write_##ord (struct asd_ha_struct *asd_ha,  \
 114                                         u16 ddb_site_no,                   \
 115                                         u16 offs, type val)                \
 116 {                                                                          \
 117         asd_write_reg_word(asd_ha, ALTCIOADR, MnDDB_SITE + offs);          \
 118         asd_write_reg_word(asd_ha, ADDBPTR, ddb_site_no);                  \
 119         asd_write_reg_##ord (asd_ha, CTXACCESS, val);                      \
 120 }
 121
 122 ASD_DDBSITE_WRITE(u32, dword);
 123 ASD_DDBSITE_WRITE(u16, word);
 124
 125 static inline void asd_ddbsite_write_byte(struct asd_ha_struct *asd_ha,
 126                                           u16 ddb_site_no,
 127                                           u16 offs, u8 val)
 128 {
 129         u16 base = offs & ~1;
 130         u16 rval = asd_ddbsite_read_word(asd_ha, ddb_site_no, base);
 131         if (offs & 1)
 132                 rval = (val << 8) | (rval & 0xFF);
 133         else
 134                 rval = (rval & 0xFF00) | val;
 135         asd_ddbsite_write_word(asd_ha, ddb_site_no, base, rval);
 136 }
 137
 138
 139 #define ASD_SCBSITE_READ(type, ord)                                        \
 140 static inline type asd_scbsite_read_##ord (struct asd_ha_struct *asd_ha,   \
 141                                            u16 scb_site_no,                \
 142                                            u16 offs)                       \
 143 {                                                                          \
 144         asd_write_reg_word(asd_ha, ALTCIOADR, MnSCB_SITE + offs);          \
 145         asd_write_reg_word(asd_ha, ASCBPTR, scb_site_no);                  \
 146         return asd_read_reg_##ord (asd_ha, CTXACCESS);                     \
 147 }
 148
 149 ASD_SCBSITE_READ(u32, dword);
 150 ASD_SCBSITE_READ(u16, word);
 151
 152 static inline u8 asd_scbsite_read_byte(struct asd_ha_struct *asd_ha,
 153                                        u16 scb_site_no,
 154                                        u16 offs)
 155 {
 156         if (offs & 1)
 157                 return asd_scbsite_read_word(asd_ha, scb_site_no,
 158                                              offs & ~1) >> 8;
 159         else
 160                 return asd_scbsite_read_word(asd_ha, scb_site_no,
 161                                              offs) & 0xFF;
 162 }
 163
 164
 165 #define ASD_SCBSITE_WRITE(type, ord)                                       \
 166 static inline void asd_scbsite_write_##ord (struct asd_ha_struct *asd_ha,  \
 167                                         u16 scb_site_no,                   \
 168                                         u16 offs, type val)                \
 169 {                                                                          \
 170         asd_write_reg_word(asd_ha, ALTCIOADR, MnSCB_SITE + offs);          \
 171         asd_write_reg_word(asd_ha, ASCBPTR, scb_site_no);                  \
 172         asd_write_reg_##ord (asd_ha, CTXACCESS, val);                      \
 173 }
 174
 175 ASD_SCBSITE_WRITE(u32, dword);
 176 ASD_SCBSITE_WRITE(u16, word);
 177
 178 static inline void asd_scbsite_write_byte(struct asd_ha_struct *asd_ha,
 179                                           u16 scb_site_no,
 180                                           u16 offs, u8 val)
 181 {
 182         u16 base = offs & ~1;
 183         u16 rval = asd_scbsite_read_word(asd_ha, scb_site_no, base);
 184         if (offs & 1)
 185                 rval = (val << 8) | (rval & 0xFF);
 186         else
 187                 rval = (rval & 0xFF00) | val;
 188         asd_scbsite_write_word(asd_ha, scb_site_no, base, rval);
 189 }
 190
 191 /**
 192  * asd_ddbsite_update_word -- atomically update a word in a ddb site
 193  * @asd_ha: pointer to host adapter structure
 194  * @ddb_site_no: the DDB site number
 195  * @offs: the offset into the DDB
 196  * @oldval: old value found in that offset
 197  * @newval: the new value to replace it
 198  *
 199  * This function is used when the sequencers are running and we need to
 200  * update a DDB site atomically without expensive pausing and upausing
 201  * of the sequencers and accessing the DDB site through the CIO bus.
 202  *
 203  * Return 0 on success; -EFAULT on parity error; -EAGAIN if the old value
 204  * is different than the current value at that offset.
 205  */
 206 static inline int asd_ddbsite_update_word(struct asd_ha_struct *asd_ha,
 207                                           u16 ddb_site_no, u16 offs,
 208                                           u16 oldval, u16 newval)
 209 {
 210         u8  done;
 211         u16 oval = asd_ddbsite_read_word(asd_ha, ddb_site_no, offs);
 212         if (oval != oldval)
 213                 return -EAGAIN;
 214         asd_write_reg_word(asd_ha, AOLDDATA, oldval);
 215         asd_write_reg_word(asd_ha, ANEWDATA, newval);
 216         do {
 217                 done = asd_read_reg_byte(asd_ha, ATOMICSTATCTL);
 218         } while (!(done & ATOMICDONE));
 219         if (done & ATOMICERR)
 220                 return -EFAULT;   /* parity error */
 221         else if (done & ATOMICWIN)
 222                 return 0;         /* success */
 223         else
 224                 return -EAGAIN;   /* oldval different than current value */
 225 }
 226
 227 static inline int asd_ddbsite_update_byte(struct asd_ha_struct *asd_ha,
 228                                           u16 ddb_site_no, u16 offs,
 229                                           u8 _oldval, u8 _newval)
 230 {
 231         u16 base = offs & ~1;
 232         u16 oval;
 233         u16 nval = asd_ddbsite_read_word(asd_ha, ddb_site_no, base);
 234         if (offs & 1) {
 235                 if ((nval >> 8) != _oldval)
 236                         return -EAGAIN;
 237                 nval = (_newval << 8) | (nval & 0xFF);
 238                 oval = (_oldval << 8) | (nval & 0xFF);
 239         } else {
 240                 if ((nval & 0xFF) != _oldval)
 241                         return -EAGAIN;
 242                 nval = (nval & 0xFF00) | _newval;
 243                 oval = (nval & 0xFF00) | _oldval;
 244         }
 245         return asd_ddbsite_update_word(asd_ha, ddb_site_no, base, oval, nval);
 246 }
 247
 248 static inline void asd_write_reg_addr(struct asd_ha_struct *asd_ha, u32 reg,
 249                                       dma_addr_t dma_handle)
 250 {
 251         asd_write_reg_dword(asd_ha, reg,   ASD_BUSADDR_LO(dma_handle));
 252         asd_write_reg_dword(asd_ha, reg+4, ASD_BUSADDR_HI(dma_handle));
 253 }
 254
 255 static inline u32 asd_get_cmdctx_size(struct asd_ha_struct *asd_ha)
 256 {
 257         /* DCHREVISION returns 0, possibly broken */
 258         u32 ctxmemsize = asd_read_reg_dword(asd_ha, LmMnINT(0,0)) & CTXMEMSIZE;
 259         return ctxmemsize ? 65536 : 32768;
 260 }
 261
 262 static inline u32 asd_get_devctx_size(struct asd_ha_struct *asd_ha)
 263 {
 264         u32 ctxmemsize = asd_read_reg_dword(asd_ha, LmMnINT(0,0)) & CTXMEMSIZE;
 265         return ctxmemsize ? 8192 : 4096;
 266 }
 267
 268 static inline void asd_disable_ints(struct asd_ha_struct *asd_ha)
 269 {
 270         asd_write_reg_dword(asd_ha, CHIMINTEN, RST_CHIMINTEN);
 271 }
 272
 273 static inline void asd_enable_ints(struct asd_ha_struct *asd_ha)
 274 {
 275         /* Enable COM SAS interrupt on errors, COMSTAT */
 276         asd_write_reg_dword(asd_ha, COMSTATEN,
 277                             EN_CSBUFPERR | EN_CSERR | EN_OVLYERR);
 278         /* Enable DCH SAS CFIFTOERR */
 279         asd_write_reg_dword(asd_ha, DCHSTATUS, EN_CFIFTOERR);
 280         /* Enable Host Device interrupts */
 281         asd_write_reg_dword(asd_ha, CHIMINTEN, SET_CHIMINTEN);
 282 }
 283
 284 #endif