@@ -19,6 +19,136 @@
#include <linux/wait.h>
#include "internal.h"
+int mhi_init_mmio(struct mhi_controller *mhi_cntrl)
+{
+ u32 val;
+ int i, ret;
+ struct mhi_chan *mhi_chan;
+ struct mhi_event *mhi_event;
+ void __iomem *base = mhi_cntrl->regs;
+ struct {
+ u32 offset;
+ u32 mask;
+ u32 shift;
+ u32 val;
+ } reg_info[] = {
+ {
+ CCABAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
+ },
+ {
+ CCABAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->chan_ctxt_addr),
+ },
+ {
+ ECABAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
+ },
+ {
+ ECABAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->er_ctxt_addr),
+ },
+ {
+ CRCBAP_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
+ },
+ {
+ CRCBAP_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->mhi_ctxt->cmd_ctxt_addr),
+ },
+ {
+ MHICFG, MHICFG_NER_MASK, MHICFG_NER_SHIFT,
+ mhi_cntrl->total_ev_rings,
+ },
+ {
+ MHICFG, MHICFG_NHWER_MASK, MHICFG_NHWER_SHIFT,
+ mhi_cntrl->hw_ev_rings,
+ },
+ {
+ MHICTRLBASE_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHICTRLBASE_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHIDATABASE_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHIDATABASE_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_start),
+ },
+ {
+ MHICTRLLIMIT_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHICTRLLIMIT_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHIDATALIMIT_HIGHER, U32_MAX, 0,
+ upper_32_bits(mhi_cntrl->iova_stop),
+ },
+ {
+ MHIDATALIMIT_LOWER, U32_MAX, 0,
+ lower_32_bits(mhi_cntrl->iova_stop),
+ },
+ { 0, 0, 0 }
+ };
+
+ dev_dbg(mhi_cntrl->dev, "Initializing MHI registers\n");
+
+ /* Read channel db offset */
+ ret = mhi_read_reg_field(mhi_cntrl, base, CHDBOFF, CHDBOFF_CHDBOFF_MASK,
+ CHDBOFF_CHDBOFF_SHIFT, &val);
+ if (ret) {
+ dev_err(mhi_cntrl->dev, "Unable to read CHDBOFF register\n");
+ return -EIO;
+ }
+
+ /* Setup wake db */
+ mhi_cntrl->wake_db = base + val + (8 * MHI_DEV_WAKE_DB);
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 4, 0);
+ mhi_write_reg(mhi_cntrl, mhi_cntrl->wake_db, 0, 0);
+ mhi_cntrl->wake_set = false;
+
+ /* Setup channel db address for each channel in tre_ring */
+ mhi_chan = mhi_cntrl->mhi_chan;
+ for (i = 0; i < mhi_cntrl->max_chan; i++, val += 8, mhi_chan++)
+ mhi_chan->tre_ring.db_addr = base + val;
+
+ /* Read event ring db offset */
+ ret = mhi_read_reg_field(mhi_cntrl, base, ERDBOFF, ERDBOFF_ERDBOFF_MASK,
+ ERDBOFF_ERDBOFF_SHIFT, &val);
+ if (ret) {
+ dev_err(mhi_cntrl->dev, "Unable to read ERDBOFF register\n");
+ return -EIO;
+ }
+
+ /* Setup event db address for each ev_ring */
+ mhi_event = mhi_cntrl->mhi_event;
+ for (i = 0; i < mhi_cntrl->total_ev_rings; i++, val += 8, mhi_event++) {
+ if (mhi_event->offload_ev)
+ continue;
+
+ mhi_event->ring.db_addr = base + val;
+ }
+
+ /* Setup DB register for primary CMD rings */
+ mhi_cntrl->mhi_cmd[PRIMARY_CMD_RING].ring.db_addr = base + CRDB_LOWER;
+
+ /* Write to MMIO registers */
+ for (i = 0; reg_info[i].offset; i++)
+ mhi_write_reg_field(mhi_cntrl, base, reg_info[i].offset,
+ reg_info[i].mask, reg_info[i].shift,
+ reg_info[i].val);
+
+ return 0;
+}
+
static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
struct mhi_controller_config *config)
{
@@ -63,6 +193,11 @@ static int parse_ev_cfg(struct mhi_controller *mhi_cntrl,
if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode))
goto error_ev_cfg;
+ if (mhi_event->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
+ mhi_event->db_cfg.process_db = mhi_db_brstmode;
+ else
+ mhi_event->db_cfg.process_db = mhi_db_brstmode_disable;
+
mhi_event->data_type = event_cfg->data_type;
mhi_event->hw_ring = event_cfg->hardware_event;
@@ -194,6 +329,11 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
}
}
+ if (mhi_chan->db_cfg.brstmode == MHI_DB_BRST_ENABLE)
+ mhi_chan->db_cfg.process_db = mhi_db_brstmode;
+ else
+ mhi_chan->db_cfg.process_db = mhi_db_brstmode_disable;
+
mhi_chan->configured = true;
if (mhi_chan->lpm_notify)
@@ -11,6 +11,262 @@
extern struct bus_type mhi_bus_type;
+/* MHI MMIO register mapping */
+#define PCI_INVALID_READ(val) (val == U32_MAX)
+
+#define MHIREGLEN (0x0)
+#define MHIREGLEN_MHIREGLEN_MASK (0xFFFFFFFF)
+#define MHIREGLEN_MHIREGLEN_SHIFT (0)
+
+#define MHIVER (0x8)
+#define MHIVER_MHIVER_MASK (0xFFFFFFFF)
+#define MHIVER_MHIVER_SHIFT (0)
+
+#define MHICFG (0x10)
+#define MHICFG_NHWER_MASK (0xFF000000)
+#define MHICFG_NHWER_SHIFT (24)
+#define MHICFG_NER_MASK (0xFF0000)
+#define MHICFG_NER_SHIFT (16)
+#define MHICFG_NHWCH_MASK (0xFF00)
+#define MHICFG_NHWCH_SHIFT (8)
+#define MHICFG_NCH_MASK (0xFF)
+#define MHICFG_NCH_SHIFT (0)
+
+#define CHDBOFF (0x18)
+#define CHDBOFF_CHDBOFF_MASK (0xFFFFFFFF)
+#define CHDBOFF_CHDBOFF_SHIFT (0)
+
+#define ERDBOFF (0x20)
+#define ERDBOFF_ERDBOFF_MASK (0xFFFFFFFF)
+#define ERDBOFF_ERDBOFF_SHIFT (0)
+
+#define BHIOFF (0x28)
+#define BHIOFF_BHIOFF_MASK (0xFFFFFFFF)
+#define BHIOFF_BHIOFF_SHIFT (0)
+
+#define BHIEOFF (0x2C)
+#define BHIEOFF_BHIEOFF_MASK (0xFFFFFFFF)
+#define BHIEOFF_BHIEOFF_SHIFT (0)
+
+#define DEBUGOFF (0x30)
+#define DEBUGOFF_DEBUGOFF_MASK (0xFFFFFFFF)
+#define DEBUGOFF_DEBUGOFF_SHIFT (0)
+
+#define MHICTRL (0x38)
+#define MHICTRL_MHISTATE_MASK (0x0000FF00)
+#define MHICTRL_MHISTATE_SHIFT (8)
+#define MHICTRL_RESET_MASK (0x2)
+#define MHICTRL_RESET_SHIFT (1)
+
+#define MHISTATUS (0x48)
+#define MHISTATUS_MHISTATE_MASK (0x0000FF00)
+#define MHISTATUS_MHISTATE_SHIFT (8)
+#define MHISTATUS_SYSERR_MASK (0x4)
+#define MHISTATUS_SYSERR_SHIFT (2)
+#define MHISTATUS_READY_MASK (0x1)
+#define MHISTATUS_READY_SHIFT (0)
+
+#define CCABAP_LOWER (0x58)
+#define CCABAP_LOWER_CCABAP_LOWER_MASK (0xFFFFFFFF)
+#define CCABAP_LOWER_CCABAP_LOWER_SHIFT (0)
+
+#define CCABAP_HIGHER (0x5C)
+#define CCABAP_HIGHER_CCABAP_HIGHER_MASK (0xFFFFFFFF)
+#define CCABAP_HIGHER_CCABAP_HIGHER_SHIFT (0)
+
+#define ECABAP_LOWER (0x60)
+#define ECABAP_LOWER_ECABAP_LOWER_MASK (0xFFFFFFFF)
+#define ECABAP_LOWER_ECABAP_LOWER_SHIFT (0)
+
+#define ECABAP_HIGHER (0x64)
+#define ECABAP_HIGHER_ECABAP_HIGHER_MASK (0xFFFFFFFF)
+#define ECABAP_HIGHER_ECABAP_HIGHER_SHIFT (0)
+
+#define CRCBAP_LOWER (0x68)
+#define CRCBAP_LOWER_CRCBAP_LOWER_MASK (0xFFFFFFFF)
+#define CRCBAP_LOWER_CRCBAP_LOWER_SHIFT (0)
+
+#define CRCBAP_HIGHER (0x6C)
+#define CRCBAP_HIGHER_CRCBAP_HIGHER_MASK (0xFFFFFFFF)
+#define CRCBAP_HIGHER_CRCBAP_HIGHER_SHIFT (0)
+
+#define CRDB_LOWER (0x70)
+#define CRDB_LOWER_CRDB_LOWER_MASK (0xFFFFFFFF)
+#define CRDB_LOWER_CRDB_LOWER_SHIFT (0)
+
+#define CRDB_HIGHER (0x74)
+#define CRDB_HIGHER_CRDB_HIGHER_MASK (0xFFFFFFFF)
+#define CRDB_HIGHER_CRDB_HIGHER_SHIFT (0)
+
+#define MHICTRLBASE_LOWER (0x80)
+#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_MASK (0xFFFFFFFF)
+#define MHICTRLBASE_LOWER_MHICTRLBASE_LOWER_SHIFT (0)
+
+#define MHICTRLBASE_HIGHER (0x84)
+#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_MASK (0xFFFFFFFF)
+#define MHICTRLBASE_HIGHER_MHICTRLBASE_HIGHER_SHIFT (0)
+
+#define MHICTRLLIMIT_LOWER (0x88)
+#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_MASK (0xFFFFFFFF)
+#define MHICTRLLIMIT_LOWER_MHICTRLLIMIT_LOWER_SHIFT (0)
+
+#define MHICTRLLIMIT_HIGHER (0x8C)
+#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_MASK (0xFFFFFFFF)
+#define MHICTRLLIMIT_HIGHER_MHICTRLLIMIT_HIGHER_SHIFT (0)
+
+#define MHIDATABASE_LOWER (0x98)
+#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_MASK (0xFFFFFFFF)
+#define MHIDATABASE_LOWER_MHIDATABASE_LOWER_SHIFT (0)
+
+#define MHIDATABASE_HIGHER (0x9C)
+#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_MASK (0xFFFFFFFF)
+#define MHIDATABASE_HIGHER_MHIDATABASE_HIGHER_SHIFT (0)
+
+#define MHIDATALIMIT_LOWER (0xA0)
+#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_MASK (0xFFFFFFFF)
+#define MHIDATALIMIT_LOWER_MHIDATALIMIT_LOWER_SHIFT (0)
+
+#define MHIDATALIMIT_HIGHER (0xA4)
+#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_MASK (0xFFFFFFFF)
+#define MHIDATALIMIT_HIGHER_MHIDATALIMIT_HIGHER_SHIFT (0)
+
+/* Host request register */
+#define MHI_SOC_RESET_REQ_OFFSET (0xB0)
+#define MHI_SOC_RESET_REQ BIT(0)
+
+/* MHI BHI offfsets */
+#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_TXDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHI_TXDB_SEQNUM_SHFT (0)
+#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)
+#define BHI_STATUS_MASK (0xC0000000)
+#define BHI_STATUS_SHIFT (30)
+#define BHI_STATUS_ERROR (3)
+#define BHI_STATUS_SUCCESS (2)
+#define BHI_STATUS_RESET (0)
+
+/* MHI BHIE offsets */
+#define BHIE_MSMSOCID_OFFS (0x0000)
+#define BHIE_TXVECADDR_LOW_OFFS (0x002C)
+#define BHIE_TXVECADDR_HIGH_OFFS (0x0030)
+#define BHIE_TXVECSIZE_OFFS (0x0034)
+#define BHIE_TXVECDB_OFFS (0x003C)
+#define BHIE_TXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_TXVECDB_SEQNUM_SHFT (0)
+#define BHIE_TXVECSTATUS_OFFS (0x0044)
+#define BHIE_TXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_TXVECSTATUS_SEQNUM_SHFT (0)
+#define BHIE_TXVECSTATUS_STATUS_BMSK (0xC0000000)
+#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_RXVECADDR_LOW_OFFS (0x0060)
+#define BHIE_RXVECADDR_HIGH_OFFS (0x0064)
+#define BHIE_RXVECSIZE_OFFS (0x0068)
+#define BHIE_RXVECDB_OFFS (0x0070)
+#define BHIE_RXVECDB_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_RXVECDB_SEQNUM_SHFT (0)
+#define BHIE_RXVECSTATUS_OFFS (0x0078)
+#define BHIE_RXVECSTATUS_SEQNUM_BMSK (0x3FFFFFFF)
+#define BHIE_RXVECSTATUS_SEQNUM_SHFT (0)
+#define BHIE_RXVECSTATUS_STATUS_BMSK (0xC0000000)
+#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)
+
+#define EV_CTX_RESERVED_MASK GENMASK(7, 0)
+#define EV_CTX_INTMODC_MASK GENMASK(15, 8)
+#define EV_CTX_INTMODC_SHIFT 8
+#define EV_CTX_INTMODT_MASK GENMASK(31, 16)
+#define EV_CTX_INTMODT_SHIFT 16
+struct mhi_event_ctxt {
+ __u32 intmod;
+ __u32 ertype;
+ __u32 msivec;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+#define CHAN_CTX_CHSTATE_MASK GENMASK(7, 0)
+#define CHAN_CTX_CHSTATE_SHIFT 0
+#define CHAN_CTX_BRSTMODE_MASK GENMASK(9, 8)
+#define CHAN_CTX_BRSTMODE_SHIFT 8
+#define CHAN_CTX_POLLCFG_MASK GENMASK(15, 10)
+#define CHAN_CTX_POLLCFG_SHIFT 10
+#define CHAN_CTX_RESERVED_MASK GENMASK(31, 16)
+struct mhi_chan_ctxt {
+ __u32 chcfg;
+ __u32 chtype;
+ __u32 erindex;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+struct mhi_cmd_ctxt {
+ __u32 reserved0;
+ __u32 reserved1;
+ __u32 reserved2;
+
+ __u64 rbase __packed __aligned(4);
+ __u64 rlen __packed __aligned(4);
+ __u64 rp __packed __aligned(4);
+ __u64 wp __packed __aligned(4);
+};
+
+struct mhi_ctxt {
+ struct mhi_event_ctxt *er_ctxt;
+ struct mhi_chan_ctxt *chan_ctxt;
+ struct mhi_cmd_ctxt *cmd_ctxt;
+ dma_addr_t er_ctxt_addr;
+ dma_addr_t chan_ctxt_addr;
+ dma_addr_t cmd_ctxt_addr;
+};
+
+struct mhi_tre {
+ u64 ptr;
+ u32 dword[2];
+};
+
+struct bhi_vec_entry {
+ u64 dma_addr;
+ u64 size;
+};
+
+enum mhi_cmd_type {
+ MHI_CMD_NOP = 1,
+ MHI_CMD_RESET_CHAN = 16,
+ MHI_CMD_STOP_CHAN = 17,
+ MHI_CMD_START_CHAN = 18,
+};
+
/* MHI transfer completion events */
enum mhi_ev_ccs {
MHI_EV_CC_INVALID = 0x0,
@@ -39,6 +295,7 @@ enum mhi_ch_state {
#define NR_OF_CMD_RINGS 1
#define CMD_EL_PER_RING 128
#define PRIMARY_CMD_RING 0
+#define MHI_DEV_WAKE_DB 127
#define MHI_MAX_MTU 0xffff
enum mhi_er_type {
@@ -160,4 +417,29 @@ static inline void mhi_dealloc_device(struct mhi_controller *mhi_cntrl,
int mhi_destroy_device(struct device *dev, void *data);
void mhi_create_devices(struct mhi_controller *mhi_cntrl);
+/* Register access methods */
+void mhi_db_brstmode(struct mhi_controller *mhi_cntrl, struct db_cfg *db_cfg,
+ void __iomem *db_addr, dma_addr_t db_val);
+void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_mode, void __iomem *db_addr,
+ dma_addr_t db_val);
+int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 *out);
+int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 mask,
+ u32 shift, u32 *out);
+void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 val);
+void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 mask, u32 shift, u32 val);
+void mhi_ring_er_db(struct mhi_event *mhi_event);
+void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
+ dma_addr_t db_val);
+void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd);
+void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan);
+
+/* Initialization methods */
+int mhi_init_mmio(struct mhi_controller *mhi_cntrl);
+
#endif /* _MHI_INT_H */
@@ -17,6 +17,124 @@
#include <linux/slab.h>
#include "internal.h"
+int __must_check mhi_read_reg(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset, u32 *out)
+{
+ u32 tmp = readl(base + offset);
+
+ /* If there is any unexpected value, query the link status */
+ if (PCI_INVALID_READ(tmp) &&
+ mhi_cntrl->link_status(mhi_cntrl))
+ return -EIO;
+
+ *out = tmp;
+
+ return 0;
+}
+
+int __must_check mhi_read_reg_field(struct mhi_controller *mhi_cntrl,
+ void __iomem *base, u32 offset,
+ u32 mask, u32 shift, u32 *out)
+{
+ u32 tmp;
+ int ret;
+
+ ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
+ if (ret)
+ return ret;
+
+ *out = (tmp & mask) >> shift;
+
+ return 0;
+}
+
+void mhi_write_reg(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 val)
+{
+ writel(val, base + offset);
+}
+
+void mhi_write_reg_field(struct mhi_controller *mhi_cntrl, void __iomem *base,
+ u32 offset, u32 mask, u32 shift, u32 val)
+{
+ int ret;
+ u32 tmp;
+
+ ret = mhi_read_reg(mhi_cntrl, base, offset, &tmp);
+ if (ret)
+ return;
+
+ tmp &= ~mask;
+ tmp |= (val << shift);
+ mhi_write_reg(mhi_cntrl, base, offset, tmp);
+}
+
+void mhi_write_db(struct mhi_controller *mhi_cntrl, void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ mhi_write_reg(mhi_cntrl, db_addr, 4, upper_32_bits(db_val));
+ mhi_write_reg(mhi_cntrl, db_addr, 0, lower_32_bits(db_val));
+}
+
+void mhi_db_brstmode(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_cfg,
+ void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ if (db_cfg->db_mode) {
+ db_cfg->db_val = db_val;
+ mhi_write_db(mhi_cntrl, db_addr, db_val);
+ db_cfg->db_mode = 0;
+ }
+}
+
+void mhi_db_brstmode_disable(struct mhi_controller *mhi_cntrl,
+ struct db_cfg *db_cfg,
+ void __iomem *db_addr,
+ dma_addr_t db_val)
+{
+ db_cfg->db_val = db_val;
+ mhi_write_db(mhi_cntrl, db_addr, db_val);
+}
+
+void mhi_ring_er_db(struct mhi_event *mhi_event)
+{
+ struct mhi_ring *ring = &mhi_event->ring;
+
+ mhi_event->db_cfg.process_db(mhi_event->mhi_cntrl, &mhi_event->db_cfg,
+ ring->db_addr, *ring->ctxt_wp);
+}
+
+void mhi_ring_cmd_db(struct mhi_controller *mhi_cntrl, struct mhi_cmd *mhi_cmd)
+{
+ dma_addr_t db;
+ struct mhi_ring *ring = &mhi_cmd->ring;
+
+ db = ring->iommu_base + (ring->wp - ring->base);
+ *ring->ctxt_wp = db;
+ mhi_write_db(mhi_cntrl, ring->db_addr, db);
+}
+
+void mhi_ring_chan_db(struct mhi_controller *mhi_cntrl,
+ struct mhi_chan *mhi_chan)
+{
+ struct mhi_ring *ring = &mhi_chan->tre_ring;
+ dma_addr_t db;
+
+ db = ring->iommu_base + (ring->wp - ring->base);
+ *ring->ctxt_wp = db;
+ mhi_chan->db_cfg.process_db(mhi_cntrl, &mhi_chan->db_cfg,
+ ring->db_addr, db);
+}
+
+enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl)
+{
+ u32 exec;
+ int ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_EXECENV, &exec);
+
+ return (ret) ? MHI_EE_MAX : exec;
+}
+
int mhi_destroy_device(struct device *dev, void *data)
{
struct mhi_device *mhi_dev;
@@ -263,6 +263,8 @@ struct mhi_controller_config {
* @dev: Driver model device node for the controller (required)
* @mhi_dev: MHI device instance for the controller
* @regs: Base address of MHI MMIO register space (required)
+ * @bhi: Points to base of MHI BHI register space
+ * @wake_db: MHI WAKE doorbell register address
* @iova_start: IOMMU starting address for data (required)
* @iova_stop: IOMMU stop address for data (required)
* @fw_image: Firmware image name for normal booting (required)
@@ -313,6 +315,8 @@ struct mhi_controller {
struct device *dev;
struct mhi_device *mhi_dev;
void __iomem *regs;
+ void __iomem *bhi;
+ void __iomem *wake_db;
dma_addr_t iova_start;
dma_addr_t iova_stop;
const char *fw_image;