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Diffstat (limited to '')
| -rw-r--r-- | drivers/bus/mhi/common.h | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/drivers/bus/mhi/common.h b/drivers/bus/mhi/common.h new file mode 100644 index 000000000..f794b9c80 --- /dev/null +++ b/drivers/bus/mhi/common.h @@ -0,0 +1,326 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2022, Linaro Ltd. + * + */ + +#ifndef _MHI_COMMON_H +#define _MHI_COMMON_H + +#include <linux/bitfield.h> +#include <linux/mhi.h> + +/* MHI registers */ +#define MHIREGLEN 0x00 +#define MHIVER 0x08 +#define MHICFG 0x10 +#define CHDBOFF 0x18 +#define ERDBOFF 0x20 +#define BHIOFF 0x28 +#define BHIEOFF 0x2c +#define DEBUGOFF 0x30 +#define MHICTRL 0x38 +#define MHISTATUS 0x48 +#define CCABAP_LOWER 0x58 +#define CCABAP_HIGHER 0x5c +#define ECABAP_LOWER 0x60 +#define ECABAP_HIGHER 0x64 +#define CRCBAP_LOWER 0x68 +#define CRCBAP_HIGHER 0x6c +#define CRDB_LOWER 0x70 +#define CRDB_HIGHER 0x74 +#define MHICTRLBASE_LOWER 0x80 +#define MHICTRLBASE_HIGHER 0x84 +#define MHICTRLLIMIT_LOWER 0x88 +#define MHICTRLLIMIT_HIGHER 0x8c +#define MHIDATABASE_LOWER 0x98 +#define MHIDATABASE_HIGHER 0x9c +#define MHIDATALIMIT_LOWER 0xa0 +#define MHIDATALIMIT_HIGHER 0xa4 + +/* MHI BHI registers */ +#define BHI_BHIVERSION_MINOR 0x00 +#define BHI_BHIVERSION_MAJOR 0x04 +#define BHI_IMGADDR_LOW 0x08 +#define BHI_IMGADDR_HIGH 0x0c +#define BHI_IMGSIZE 0x10 +#define BHI_RSVD1 0x14 +#define BHI_IMGTXDB 0x18 +#define BHI_RSVD2 0x1c +#define BHI_INTVEC 0x20 +#define BHI_RSVD3 0x24 +#define BHI_EXECENV 0x28 +#define BHI_STATUS 0x2c +#define BHI_ERRCODE 0x30 +#define BHI_ERRDBG1 0x34 +#define BHI_ERRDBG2 0x38 +#define BHI_ERRDBG3 0x3c +#define BHI_SERIALNU 0x40 +#define BHI_SBLANTIROLLVER 0x44 +#define BHI_NUMSEG 0x48 +#define BHI_MSMHWID(n) (0x4c + (0x4 * (n))) +#define BHI_OEMPKHASH(n) (0x64 + (0x4 * (n))) +#define BHI_RSVD5 0xc4 + +/* BHI register bits */ +#define BHI_TXDB_SEQNUM_BMSK GENMASK(29, 0) +#define BHI_TXDB_SEQNUM_SHFT 0 +#define BHI_STATUS_MASK GENMASK(31, 30) +#define BHI_STATUS_ERROR 0x03 +#define BHI_STATUS_SUCCESS 0x02 +#define BHI_STATUS_RESET 0x00 + +/* MHI BHIE registers */ +#define BHIE_MSMSOCID_OFFS 0x00 +#define BHIE_TXVECADDR_LOW_OFFS 0x2c +#define BHIE_TXVECADDR_HIGH_OFFS 0x30 +#define BHIE_TXVECSIZE_OFFS 0x34 +#define BHIE_TXVECDB_OFFS 0x3c +#define BHIE_TXVECSTATUS_OFFS 0x44 +#define BHIE_RXVECADDR_LOW_OFFS 0x60 +#define BHIE_RXVECADDR_HIGH_OFFS 0x64 +#define BHIE_RXVECSIZE_OFFS 0x68 +#define BHIE_RXVECDB_OFFS 0x70 +#define BHIE_RXVECSTATUS_OFFS 0x78 + +/* BHIE register bits */ +#define BHIE_TXVECDB_SEQNUM_BMSK GENMASK(29, 0) +#define BHIE_TXVECDB_SEQNUM_SHFT 0 +#define BHIE_TXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0) +#define BHIE_TXVECSTATUS_SEQNUM_SHFT 0 +#define BHIE_TXVECSTATUS_STATUS_BMSK GENMASK(31, 30) +#define BHIE_TXVECSTATUS_STATUS_SHFT 30 +#define BHIE_TXVECSTATUS_STATUS_RESET 0x00 +#define BHIE_TXVECSTATUS_STATUS_XFER_COMPL 0x02 +#define BHIE_TXVECSTATUS_STATUS_ERROR 0x03 +#define BHIE_RXVECDB_SEQNUM_BMSK GENMASK(29, 0) +#define BHIE_RXVECDB_SEQNUM_SHFT 0 +#define BHIE_RXVECSTATUS_SEQNUM_BMSK GENMASK(29, 0) +#define BHIE_RXVECSTATUS_SEQNUM_SHFT 0 +#define BHIE_RXVECSTATUS_STATUS_BMSK GENMASK(31, 30) +#define BHIE_RXVECSTATUS_STATUS_SHFT 30 +#define BHIE_RXVECSTATUS_STATUS_RESET 0x00 +#define BHIE_RXVECSTATUS_STATUS_XFER_COMPL 0x02 +#define BHIE_RXVECSTATUS_STATUS_ERROR 0x03 + +/* MHI register bits */ +#define MHICFG_NHWER_MASK GENMASK(31, 24) +#define MHICFG_NER_MASK GENMASK(23, 16) +#define MHICFG_NHWCH_MASK GENMASK(15, 8) +#define MHICFG_NCH_MASK GENMASK(7, 0) +#define MHICTRL_MHISTATE_MASK GENMASK(15, 8) +#define MHICTRL_RESET_MASK BIT(1) +#define MHISTATUS_MHISTATE_MASK GENMASK(15, 8) +#define MHISTATUS_SYSERR_MASK BIT(2) +#define MHISTATUS_READY_MASK BIT(0) + +/* Command Ring Element macros */ +/* No operation command */ +#define MHI_TRE_CMD_NOOP_PTR 0 +#define MHI_TRE_CMD_NOOP_DWORD0 0 +#define MHI_TRE_CMD_NOOP_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), MHI_CMD_NOP)) + +/* Channel reset command */ +#define MHI_TRE_CMD_RESET_PTR 0 +#define MHI_TRE_CMD_RESET_DWORD0 0 +#define MHI_TRE_CMD_RESET_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ + FIELD_PREP(GENMASK(23, 16), \ + MHI_CMD_RESET_CHAN)) + +/* Channel stop command */ +#define MHI_TRE_CMD_STOP_PTR 0 +#define MHI_TRE_CMD_STOP_DWORD0 0 +#define MHI_TRE_CMD_STOP_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ + FIELD_PREP(GENMASK(23, 16), \ + MHI_CMD_STOP_CHAN)) + +/* Channel start command */ +#define MHI_TRE_CMD_START_PTR 0 +#define MHI_TRE_CMD_START_DWORD0 0 +#define MHI_TRE_CMD_START_DWORD1(chid) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ + FIELD_PREP(GENMASK(23, 16), \ + MHI_CMD_START_CHAN)) + +#define MHI_TRE_GET_DWORD(tre, word) le32_to_cpu((tre)->dword[(word)]) +#define MHI_TRE_GET_CMD_CHID(tre) FIELD_GET(GENMASK(31, 24), MHI_TRE_GET_DWORD(tre, 1)) +#define MHI_TRE_GET_CMD_TYPE(tre) FIELD_GET(GENMASK(23, 16), MHI_TRE_GET_DWORD(tre, 1)) + +/* Event descriptor macros */ +#define MHI_TRE_EV_PTR(ptr) cpu_to_le64(ptr) +#define MHI_TRE_EV_DWORD0(code, len) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code) | \ + FIELD_PREP(GENMASK(15, 0), len)) +#define MHI_TRE_EV_DWORD1(chid, type) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), chid) | \ + FIELD_PREP(GENMASK(23, 16), type)) +#define MHI_TRE_GET_EV_PTR(tre) le64_to_cpu((tre)->ptr) +#define MHI_TRE_GET_EV_CODE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) +#define MHI_TRE_GET_EV_LEN(tre) FIELD_GET(GENMASK(15, 0), (MHI_TRE_GET_DWORD(tre, 0))) +#define MHI_TRE_GET_EV_CHID(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1))) +#define MHI_TRE_GET_EV_TYPE(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 1))) +#define MHI_TRE_GET_EV_STATE(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) +#define MHI_TRE_GET_EV_EXECENV(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 0))) +#define MHI_TRE_GET_EV_SEQ(tre) MHI_TRE_GET_DWORD(tre, 0) +#define MHI_TRE_GET_EV_TIME(tre) MHI_TRE_GET_EV_PTR(tre) +#define MHI_TRE_GET_EV_COOKIE(tre) lower_32_bits(MHI_TRE_GET_EV_PTR(tre)) +#define MHI_TRE_GET_EV_VEID(tre) FIELD_GET(GENMASK(23, 16), (MHI_TRE_GET_DWORD(tre, 0))) +#define MHI_TRE_GET_EV_LINKSPEED(tre) FIELD_GET(GENMASK(31, 24), (MHI_TRE_GET_DWORD(tre, 1))) +#define MHI_TRE_GET_EV_LINKWIDTH(tre) FIELD_GET(GENMASK(7, 0), (MHI_TRE_GET_DWORD(tre, 0))) + +/* State change event */ +#define MHI_SC_EV_PTR 0 +#define MHI_SC_EV_DWORD0(state) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), state)) +#define MHI_SC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) + +/* EE event */ +#define MHI_EE_EV_PTR 0 +#define MHI_EE_EV_DWORD0(ee) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), ee)) +#define MHI_EE_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) + + +/* Command Completion event */ +#define MHI_CC_EV_PTR(ptr) cpu_to_le64(ptr) +#define MHI_CC_EV_DWORD0(code) cpu_to_le32(FIELD_PREP(GENMASK(31, 24), code)) +#define MHI_CC_EV_DWORD1(type) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), type)) + +/* Transfer descriptor macros */ +#define MHI_TRE_DATA_PTR(ptr) cpu_to_le64(ptr) +#define MHI_TRE_DATA_DWORD0(len) cpu_to_le32(FIELD_PREP(GENMASK(15, 0), len)) +#define MHI_TRE_TYPE_TRANSFER 2 +#define MHI_TRE_DATA_DWORD1(bei, ieot, ieob, chain) cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \ + MHI_TRE_TYPE_TRANSFER) | \ + FIELD_PREP(BIT(10), bei) | \ + FIELD_PREP(BIT(9), ieot) | \ + FIELD_PREP(BIT(8), ieob) | \ + FIELD_PREP(BIT(0), chain)) +#define MHI_TRE_DATA_GET_PTR(tre) le64_to_cpu((tre)->ptr) +#define MHI_TRE_DATA_GET_LEN(tre) FIELD_GET(GENMASK(15, 0), MHI_TRE_GET_DWORD(tre, 0)) +#define MHI_TRE_DATA_GET_CHAIN(tre) (!!(FIELD_GET(BIT(0), MHI_TRE_GET_DWORD(tre, 1)))) +#define MHI_TRE_DATA_GET_IEOB(tre) (!!(FIELD_GET(BIT(8), MHI_TRE_GET_DWORD(tre, 1)))) +#define MHI_TRE_DATA_GET_IEOT(tre) (!!(FIELD_GET(BIT(9), MHI_TRE_GET_DWORD(tre, 1)))) +#define MHI_TRE_DATA_GET_BEI(tre) (!!(FIELD_GET(BIT(10), MHI_TRE_GET_DWORD(tre, 1)))) + +/* RSC transfer descriptor macros */ +#define MHI_RSCTRE_DATA_PTR(ptr, len) cpu_to_le64(FIELD_PREP(GENMASK(64, 48), len) | ptr) +#define MHI_RSCTRE_DATA_DWORD0(cookie) cpu_to_le32(cookie) +#define MHI_RSCTRE_DATA_DWORD1 cpu_to_le32(FIELD_PREP(GENMASK(23, 16), \ + MHI_PKT_TYPE_COALESCING)) + +enum mhi_pkt_type { + MHI_PKT_TYPE_INVALID = 0x0, + MHI_PKT_TYPE_NOOP_CMD = 0x1, + MHI_PKT_TYPE_TRANSFER = 0x2, + MHI_PKT_TYPE_COALESCING = 0x8, + MHI_PKT_TYPE_RESET_CHAN_CMD = 0x10, + MHI_PKT_TYPE_STOP_CHAN_CMD = 0x11, + MHI_PKT_TYPE_START_CHAN_CMD = 0x12, + MHI_PKT_TYPE_STATE_CHANGE_EVENT = 0x20, + MHI_PKT_TYPE_CMD_COMPLETION_EVENT = 0x21, + MHI_PKT_TYPE_TX_EVENT = 0x22, + MHI_PKT_TYPE_RSC_TX_EVENT = 0x28, + MHI_PKT_TYPE_EE_EVENT = 0x40, + MHI_PKT_TYPE_TSYNC_EVENT = 0x48, + MHI_PKT_TYPE_BW_REQ_EVENT = 0x50, + MHI_PKT_TYPE_STALE_EVENT, /* internal event */ +}; + +/* MHI transfer completion events */ +enum mhi_ev_ccs { + MHI_EV_CC_INVALID = 0x0, + MHI_EV_CC_SUCCESS = 0x1, + MHI_EV_CC_EOT = 0x2, /* End of transfer event */ + MHI_EV_CC_OVERFLOW = 0x3, + MHI_EV_CC_EOB = 0x4, /* End of block event */ + MHI_EV_CC_OOB = 0x5, /* Out of block event */ + MHI_EV_CC_DB_MODE = 0x6, + MHI_EV_CC_UNDEFINED_ERR = 0x10, + MHI_EV_CC_BAD_TRE = 0x11, +}; + +/* Channel state */ +enum mhi_ch_state { + MHI_CH_STATE_DISABLED, + MHI_CH_STATE_ENABLED, + MHI_CH_STATE_RUNNING, + MHI_CH_STATE_SUSPENDED, + MHI_CH_STATE_STOP, + MHI_CH_STATE_ERROR, +}; + +enum mhi_cmd_type { + MHI_CMD_NOP = 1, + MHI_CMD_RESET_CHAN = 16, + MHI_CMD_STOP_CHAN = 17, + MHI_CMD_START_CHAN = 18, +}; + +#define EV_CTX_RESERVED_MASK GENMASK(7, 0) +#define EV_CTX_INTMODC_MASK GENMASK(15, 8) +#define EV_CTX_INTMODT_MASK GENMASK(31, 16) +struct mhi_event_ctxt { + __le32 intmod; + __le32 ertype; + __le32 msivec; + + __le64 rbase __packed __aligned(4); + __le64 rlen __packed __aligned(4); + __le64 rp __packed __aligned(4); + __le64 wp __packed __aligned(4); +}; + +#define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0) +#define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8) +#define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10) +#define CHAN_CTX_RESERVED_MASK GENMASK(31, 16) +struct mhi_chan_ctxt { + __le32 chcfg; + __le32 chtype; + __le32 erindex; + + __le64 rbase __packed __aligned(4); + __le64 rlen __packed __aligned(4); + __le64 rp __packed __aligned(4); + __le64 wp __packed __aligned(4); +}; + +struct mhi_cmd_ctxt { + __le32 reserved0; + __le32 reserved1; + __le32 reserved2; + + __le64 rbase __packed __aligned(4); + __le64 rlen __packed __aligned(4); + __le64 rp __packed __aligned(4); + __le64 wp __packed __aligned(4); +}; + +struct mhi_ring_element { + __le64 ptr; + __le32 dword[2]; +}; + +static inline const char *mhi_state_str(enum mhi_state state) +{ + switch (state) { + case MHI_STATE_RESET: + return "RESET"; + case MHI_STATE_READY: + return "READY"; + case MHI_STATE_M0: + return "M0"; + case MHI_STATE_M1: + return "M1"; + case MHI_STATE_M2: + return "M2"; + case MHI_STATE_M3: + return "M3"; + case MHI_STATE_M3_FAST: + return "M3 FAST"; + case MHI_STATE_BHI: + return "BHI"; + case MHI_STATE_SYS_ERR: + return "SYS ERROR"; + default: + return "Unknown state"; + } +}; + +#endif /* _MHI_COMMON_H */ |