1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2022, Linaro Ltd. 4 * 5 */ 6 7 #ifndef _MHI_COMMON_H 8 #define _MHI_COMMON_H 9 10 #include <linux/bitfield.h> 11 #include <linux/mhi.h> 12 13 /* MHI registers */ 14 #define MHIREGLEN 0x00 15 #define MHIVER 0x08 16 #define MHICFG 0x10 17 #define CHDBOFF 0x18 18 #define ERDBOFF 0x20 19 #define BHIOFF 0x28 20 #define BHIEOFF 0x2c 21 #define DEBUGOFF 0x30 22 #define MHICTRL 0x38 23 #define MHISTATUS 0x48 24 #define CCABAP_LOWER 0x58 25 #define CCABAP_HIGHER 0x5c 26 #define ECABAP_LOWER 0x60 27 #define ECABAP_HIGHER 0x64 28 #define CRCBAP_LOWER 0x68 29 #define CRCBAP_HIGHER 0x6c 30 #define CRDB_LOWER 0x70 31 #define CRDB_HIGHER 0x74 32 #define MHICTRLBASE_LOWER 0x80 33 #define MHICTRLBASE_HIGHER 0x84 34 #define MHICTRLLIMIT_LOWER 0x88 35 #define MHICTRLLIMIT_HIGHER 0x8c 36 #define MHIDATABASE_LOWER 0x98 37 #define MHIDATABASE_HIGHER 0x9c 38 #define MHIDATALIMIT_LOWER 0xa0 39 #define MHIDATALIMIT_HIGHER 0xa4 40 41 /* MHI BHI registers */ 42 #define BHI_BHIVERSION_MINOR 0x00 43 #define BHI_BHIVERSION_MAJOR 0x04 44 #define BHI_IMGADDR_LOW 0x08 45 #define BHI_IMGADDR_HIGH 0x0c 46 #define BHI_IMGSIZE 0x10 47 #define BHI_RSVD1 0x14 48 #define BHI_IMGTXDB 0x18 49 #define BHI_RSVD2 0x1c 50 #define BHI_INTVEC 0x20 51 #define BHI_RSVD3 0x24 52 #define BHI_EXECENV 0x28 53 #define BHI_STATUS 0x2c 54 #define BHI_ERRCODE 0x30 55 #define BHI_ERRDBG1 0x34 56 #define BHI_ERRDBG2 0x38 57 #define BHI_ERRDBG3 0x3c 58 #define BHI_SERIALNU 0x40 59 #define BHI_SBLANTIROLLVER 0x44 60 #define BHI_NUMSEG 0x48 61 #define BHI_MSMHWID(n) (0x4c + (0x4 * (n))) 62 #define BHI_OEMPKHASH(n) (0x64 + (0x4 * (n))) 63 #define BHI_RSVD5 0xc4 64 65 /* BHI register bits */ 66 #define BHI_TXDB_SEQNUM_BMSK GENMASK(29, 0) 67 #define BHI_TXDB_SEQNUM_SHFT 0 68 #define BHI_STATUS_MASK GENMASK(31, 30) 69 #define BHI_STATUS_ERROR 0x03 70 #define BHI_STATUS_SUCCESS 0x02 71 #define BHI_STATUS_RESET 0x00 72 73 /* MHI BHIE registers */ 74 #define BHIE_MSMSOCID_OFFS 0x00 75 #define BHIE_TXVECADDR_LOW_OFFS 0x2c 76 #define BHIE_TXVECADDR_HIGH_OFFS 0x30 77 #define BHIE_TXVECSIZE_OFFS 0x34 78 #define BHIE_TXVECDB_OFFS 0x3c 79 #define BHIE_TXVECSTATUS_OFFS 0x44 80 #define BHIE_RXVECADDR_LOW_OFFS 0x60 81 #define BHIE_RXVECADDR_HIGH_OFFS 0x64 82 #define BHIE_RXVECSIZE_OFFS 0x68 83 #define BHIE_RXVECDB_OFFS 0x70 84 #define BHIE_RXVECSTATUS_OFFS 0x78 85 86 /* BHIE register bits */ 87 #define BHIE_TXVECDB_SEQNUM_BMSK GENMASK(29, 0) 88 #define BHIE_TXVECDB_SEQNUM_SHFT 0 89 #define BHIE_TXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0) 90 #define BHIE_TXVECSTATUS_SEQNUM_SHFT 0 91 #define BHIE_TXVECSTATUS_STATUS_BMSK GENMASK(31, 30) 92 #define BHIE_TXVECSTATUS_STATUS_SHFT 30 93 #define BHIE_TXVECSTATUS_STATUS_RESET 0x00 94 #define BHIE_TXVECSTATUS_STATUS_XFER_COMPL 0x02 95 #define BHIE_TXVECSTATUS_STATUS_ERROR 0x03 96 #define BHIE_RXVECDB_SEQNUM_BMSK GENMASK(29, 0) 97 #define BHIE_RXVECDB_SEQNUM_SHFT 0 98 #define BHIE_RXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0) 99 #define BHIE_RXVECSTATUS_SEQNUM_SHFT 0 100 #define BHIE_RXVECSTATUS_STATUS_BMSK GENMASK(31, 30) 101 #define BHIE_RXVECSTATUS_STATUS_SHFT 30 102 #define BHIE_RXVECSTATUS_STATUS_RESET 0x00 103 #define BHIE_RXVECSTATUS_STATUS_XFER_COMPL 0x02 104 #define BHIE_RXVECSTATUS_STATUS_ERROR 0x03 105 106 /* MHI register bits */ 107 #define MHICFG_NHWER_MASK GENMASK(31, 24) 108 #define MHICFG_NER_MASK GENMASK(23, 16) 109 #define MHICFG_NHWCH_MASK GENMASK(15, 8) 110 #define MHICFG_NCH_MASK GENMASK(7, 0) 111 #define MHICTRL_MHISTATE_MASK GENMASK(15, 8) 112 #define MHICTRL_RESET_MASK BIT(1) 113 #define MHISTATUS_MHISTATE_MASK GENMASK(15, 8) 114 #define MHISTATUS_SYSERR_MASK BIT(2) 115 #define MHISTATUS_READY_MASK BIT(0) 116 117 /* Command Ring Element macros */ 118 /* No operation command */ 119 #define MHI_TRE_CMD_NOOP_PTR 0 120 #define MHI_TRE_CMD_NOOP_DWORD0 0 121 #define MHI_TRE_CMD_NOOP_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), MHI_CMD_NOP)) 122 123 /* Channel reset command */ 124 #define MHI_TRE_CMD_RESET_PTR 0 125 #define MHI_TRE_CMD_RESET_DWORD0 0 126 #define MHI_TRE_CMD_RESET_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ 127 FIELD_PREP(GENMASK(23, 16), \ 128 MHI_CMD_RESET_CHAN)) 129 130 /* Channel stop command */ 131 #define MHI_TRE_CMD_STOP_PTR 0 132 #define MHI_TRE_CMD_STOP_DWORD0 0 133 #define MHI_TRE_CMD_STOP_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ 134 FIELD_PREP(GENMASK(23, 16), \ 135 MHI_CMD_STOP_CHAN)) 136 137 /* Channel start command */ 138 #define MHI_TRE_CMD_START_PTR 0 139 #define MHI_TRE_CMD_START_DWORD0 0 140 #define MHI_TRE_CMD_START_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ 141 FIELD_PREP(GENMASK(23, 16), \ 142 MHI_CMD_START_CHAN)) 143 144 #define MHI_TRE_GET_DWORD(tre, word) le32_to_cpu((tre)->dword[(word)]) 145 #define MHI_TRE_GET_CMD_CHID(tre) FIELD_GET(GENMASK(31, 24), MHI_TRE_GET_DWORD(tre, 1)) 146 #define MHI_TRE_GET_CMD_TYPE(tre) FIELD_GET(GENMASK(23, 16), MHI_TRE_GET_DWORD(tre, 1)) 147 148 /* Event descriptor macros */ 149 #define MHI_TRE_EV_PTR(ptr) cpu_to_le64(ptr) 150 #define MHI_TRE_EV_DWORD0(code, len) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code) | \ 151 FIELD_PREP(GENMASK(15, 0), len)) 152 #define MHI_TRE_EV_DWORD1(chid, type) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ 153 FIELD_PREP(GENMASK(23, 16), type)) 154 #define MHI_TRE_GET_EV_PTR(tre) le64_to_cpu((tre)->ptr) 155 #define MHI_TRE_GET_EV_CODE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) 156 #define MHI_TRE_GET_EV_LEN(tre) FIELD_GET(GENMASK(15, 0), (MHI_TRE_GET_DWORD(tre, 0))) 157 #define MHI_TRE_GET_EV_CHID(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1))) 158 #define MHI_TRE_GET_EV_TYPE(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 1))) 159 #define MHI_TRE_GET_EV_STATE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) 160 #define MHI_TRE_GET_EV_EXECENV(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) 161 #define MHI_TRE_GET_EV_SEQ(tre) MHI_TRE_GET_DWORD(tre, 0) 162 #define MHI_TRE_GET_EV_TIME(tre) MHI_TRE_GET_EV_PTR(tre) 163 #define MHI_TRE_GET_EV_COOKIE(tre) lower_32_bits(MHI_TRE_GET_EV_PTR(tre)) 164 #define MHI_TRE_GET_EV_VEID(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 0))) 165 #define MHI_TRE_GET_EV_LINKSPEED(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1))) 166 #define MHI_TRE_GET_EV_LINKWIDTH(tre) FIELD_GET(GENMASK(7, 0), (MHI_TRE_GET_DWORD(tre, 0))) 167 168 /* State change event */ 169 #define MHI_SC_EV_PTR 0 170 #define MHI_SC_EV_DWORD0(state) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), state)) 171 #define MHI_SC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) 172 173 /* EE event */ 174 #define MHI_EE_EV_PTR 0 175 #define MHI_EE_EV_DWORD0(ee) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), ee)) 176 #define MHI_EE_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) 177 178 179 /* Command Completion event */ 180 #define MHI_CC_EV_PTR(ptr) cpu_to_le64(ptr) 181 #define MHI_CC_EV_DWORD0(code) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code)) 182 #define MHI_CC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) 183 184 /* Transfer descriptor macros */ 185 #define MHI_TRE_DATA_PTR(ptr) cpu_to_le64(ptr) 186 #define MHI_TRE_DATA_DWORD0(len) cpu_to_le32(FIELD_PREP(GENMASK(15, 0), len)) 187 #define MHI_TRE_TYPE_TRANSFER 2 188 #define MHI_TRE_DATA_DWORD1(bei, ieot, ieob, chain) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \ 189 MHI_TRE_TYPE_TRANSFER) | \ 190 FIELD_PREP(BIT(10), bei) | \ 191 FIELD_PREP(BIT(9), ieot) | \ 192 FIELD_PREP(BIT(8), ieob) | \ 193 FIELD_PREP(BIT(0), chain)) 194 #define MHI_TRE_DATA_GET_PTR(tre) le64_to_cpu((tre)->ptr) 195 #define MHI_TRE_DATA_GET_LEN(tre) FIELD_GET(GENMASK(15, 0), MHI_TRE_GET_DWORD(tre, 0)) 196 #define MHI_TRE_DATA_GET_CHAIN(tre) (!!(FIELD_GET(BIT(0), MHI_TRE_GET_DWORD(tre, 1)))) 197 #define MHI_TRE_DATA_GET_IEOB(tre) (!!(FIELD_GET(BIT(8), MHI_TRE_GET_DWORD(tre, 1)))) 198 #define MHI_TRE_DATA_GET_IEOT(tre) (!!(FIELD_GET(BIT(9), MHI_TRE_GET_DWORD(tre, 1)))) 199 #define MHI_TRE_DATA_GET_BEI(tre) (!!(FIELD_GET(BIT(10), MHI_TRE_GET_DWORD(tre, 1)))) 200 201 /* RSC transfer descriptor macros */ 202 #define MHI_RSCTRE_DATA_PTR(ptr, len) cpu_to_le64(FIELD_PREP(GENMASK(64, 48), len) | ptr) 203 #define MHI_RSCTRE_DATA_DWORD0(cookie) cpu_to_le32(cookie) 204 #define MHI_RSCTRE_DATA_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \ 205 MHI_PKT_TYPE_COALESCING)) 206 207 enum mhi_pkt_type { 208 MHI_PKT_TYPE_INVALID = 0x0, 209 MHI_PKT_TYPE_NOOP_CMD = 0x1, 210 MHI_PKT_TYPE_TRANSFER = 0x2, 211 MHI_PKT_TYPE_COALESCING = 0x8, 212 MHI_PKT_TYPE_RESET_CHAN_CMD = 0x10, 213 MHI_PKT_TYPE_STOP_CHAN_CMD = 0x11, 214 MHI_PKT_TYPE_START_CHAN_CMD = 0x12, 215 MHI_PKT_TYPE_STATE_CHANGE_EVENT = 0x20, 216 MHI_PKT_TYPE_CMD_COMPLETION_EVENT = 0x21, 217 MHI_PKT_TYPE_TX_EVENT = 0x22, 218 MHI_PKT_TYPE_RSC_TX_EVENT = 0x28, 219 MHI_PKT_TYPE_EE_EVENT = 0x40, 220 MHI_PKT_TYPE_TSYNC_EVENT = 0x48, 221 MHI_PKT_TYPE_BW_REQ_EVENT = 0x50, 222 MHI_PKT_TYPE_STALE_EVENT, /* internal event */ 223 }; 224 225 /* MHI transfer completion events */ 226 enum mhi_ev_ccs { 227 MHI_EV_CC_INVALID = 0x0, 228 MHI_EV_CC_SUCCESS = 0x1, 229 MHI_EV_CC_EOT = 0x2, /* End of transfer event */ 230 MHI_EV_CC_OVERFLOW = 0x3, 231 MHI_EV_CC_EOB = 0x4, /* End of block event */ 232 MHI_EV_CC_OOB = 0x5, /* Out of block event */ 233 MHI_EV_CC_DB_MODE = 0x6, 234 MHI_EV_CC_UNDEFINED_ERR = 0x10, 235 MHI_EV_CC_BAD_TRE = 0x11, 236 }; 237 238 /* Channel state */ 239 enum mhi_ch_state { 240 MHI_CH_STATE_DISABLED, 241 MHI_CH_STATE_ENABLED, 242 MHI_CH_STATE_RUNNING, 243 MHI_CH_STATE_SUSPENDED, 244 MHI_CH_STATE_STOP, 245 MHI_CH_STATE_ERROR, 246 }; 247 248 enum mhi_cmd_type { 249 MHI_CMD_NOP = 1, 250 MHI_CMD_RESET_CHAN = 16, 251 MHI_CMD_STOP_CHAN = 17, 252 MHI_CMD_START_CHAN = 18, 253 }; 254 255 #define EV_CTX_RESERVED_MASK GENMASK(7, 0) 256 #define EV_CTX_INTMODC_MASK GENMASK(15, 8) 257 #define EV_CTX_INTMODT_MASK GENMASK(31, 16) 258 struct mhi_event_ctxt { 259 __le32 intmod; 260 __le32 ertype; 261 __le32 msivec; 262 263 __le64 rbase __packed __aligned(4); 264 __le64 rlen __packed __aligned(4); 265 __le64 rp __packed __aligned(4); 266 __le64 wp __packed __aligned(4); 267 }; 268 269 #define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0) 270 #define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8) 271 #define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10) 272 #define CHAN_CTX_RESERVED_MASK GENMASK(31, 16) 273 struct mhi_chan_ctxt { 274 __le32 chcfg; 275 __le32 chtype; 276 __le32 erindex; 277 278 __le64 rbase __packed __aligned(4); 279 __le64 rlen __packed __aligned(4); 280 __le64 rp __packed __aligned(4); 281 __le64 wp __packed __aligned(4); 282 }; 283 284 struct mhi_cmd_ctxt { 285 __le32 reserved0; 286 __le32 reserved1; 287 __le32 reserved2; 288 289 __le64 rbase __packed __aligned(4); 290 __le64 rlen __packed __aligned(4); 291 __le64 rp __packed __aligned(4); 292 __le64 wp __packed __aligned(4); 293 }; 294 295 struct mhi_ring_element { 296 __le64 ptr; 297 __le32 dword[2]; 298 }; 299 300 #define MHI_STATE_LIST \ 301 mhi_state(RESET, "RESET") \ 302 mhi_state(READY, "READY") \ 303 mhi_state(M0, "M0") \ 304 mhi_state(M1, "M1") \ 305 mhi_state(M2, "M2") \ 306 mhi_state(M3, "M3") \ 307 mhi_state(M3_FAST, "M3_FAST") \ 308 mhi_state(BHI, "BHI") \ 309 mhi_state_end(SYS_ERR, "SYS ERROR") 310 311 #undef mhi_state 312 #undef mhi_state_end 313 314 #define mhi_state(a, b) case MHI_STATE_##a: return b; 315 #define mhi_state_end(a, b) case MHI_STATE_##a: return b; 316 mhi_state_str(enum mhi_state state)317 static inline const char *mhi_state_str(enum mhi_state state) 318 { 319 switch (state) { 320 MHI_STATE_LIST 321 default: 322 return "Unknown state"; 323 } 324 } 325 326 #endif /* _MHI_COMMON_H */ 327