/*- * Copyright (c) 2014-2019 Ruslan Bukin * All rights reserved. * * This software was developed by SRI International and the University of * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) * ("CTSRD"), as part of the DARPA CRASH research programme. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Synopsys DesignWare Mobile Storage Host Controller * Chapter 14, Altera Cyclone V Device Handbook (CV-5V2 2014.07.22) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_mmccam.h" #ifdef MMCCAM #include #include #include #include #include #include "mmc_sim_if.h" #endif #include "mmcbr_if.h" #ifdef DEBUG #define dprintf(fmt, args...) printf(fmt, ##args) #else #define dprintf(x, arg...) #endif #define READ4(_sc, _reg) \ bus_read_4((_sc)->res[0], _reg) #define WRITE4(_sc, _reg, _val) \ bus_write_4((_sc)->res[0], _reg, _val) #define DIV_ROUND_UP(n, d) howmany(n, d) #define DWMMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) #define DWMMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) #define DWMMC_LOCK_INIT(_sc) \ mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ "dwmmc", MTX_DEF) #define DWMMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); #define DWMMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); #define DWMMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); #define PENDING_CMD 0x01 #define PENDING_STOP 0x02 #define CARD_INIT_DONE 0x04 #define DWMMC_DATA_ERR_FLAGS (SDMMC_INTMASK_DRT | SDMMC_INTMASK_DCRC \ |SDMMC_INTMASK_SBE | SDMMC_INTMASK_EBE) #define DWMMC_CMD_ERR_FLAGS (SDMMC_INTMASK_RTO | SDMMC_INTMASK_RCRC \ |SDMMC_INTMASK_RE) #define DWMMC_ERR_FLAGS (DWMMC_DATA_ERR_FLAGS | DWMMC_CMD_ERR_FLAGS \ |SDMMC_INTMASK_HLE) #define DES0_DIC (1 << 1) /* Disable Interrupt on Completion */ #define DES0_LD (1 << 2) /* Last Descriptor */ #define DES0_FS (1 << 3) /* First Descriptor */ #define DES0_CH (1 << 4) /* second address CHained */ #define DES0_ER (1 << 5) /* End of Ring */ #define DES0_CES (1 << 30) /* Card Error Summary */ #define DES0_OWN (1 << 31) /* OWN */ #define DES1_BS1_MASK 0x1fff struct idmac_desc { uint32_t des0; /* control */ uint32_t des1; /* bufsize */ uint32_t des2; /* buf1 phys addr */ uint32_t des3; /* buf2 phys addr or next descr */ }; #define IDMAC_DESC_SEGS (PAGE_SIZE / (sizeof(struct idmac_desc))) #define IDMAC_DESC_SIZE (sizeof(struct idmac_desc) * IDMAC_DESC_SEGS) #define DEF_MSIZE 0x2 /* Burst size of multiple transaction */ /* * Size field in DMA descriptor is 13 bits long (up to 4095 bytes), * but must be a multiple of the data bus size.Additionally, we must ensure * that bus_dmamap_load() doesn't additionally fragments buffer (because it * is processed with page size granularity). Thus limit fragment size to half * of page. * XXX switch descriptor format to array and use second buffer pointer for * second half of page */ #define IDMAC_MAX_SIZE 2048 /* * Busdma may bounce buffers, so we must reserve 2 descriptors * (on start and on end) for bounced fragments. */ #define DWMMC_MAX_DATA (IDMAC_MAX_SIZE * (IDMAC_DESC_SEGS - 2)) / MMC_SECTOR_SIZE static void dwmmc_next_operation(struct dwmmc_softc *); static int dwmmc_setup_bus(struct dwmmc_softc *, int); static int dma_done(struct dwmmc_softc *, struct mmc_command *); static int dma_stop(struct dwmmc_softc *); static void pio_read(struct dwmmc_softc *, struct mmc_command *); static void pio_write(struct dwmmc_softc *, struct mmc_command *); static void dwmmc_handle_card_present(struct dwmmc_softc *sc, bool is_present); static struct resource_spec dwmmc_spec[] = { { SYS_RES_MEMORY, 0, RF_ACTIVE }, { SYS_RES_IRQ, 0, RF_ACTIVE }, { -1, 0 } }; #define HWTYPE_MASK (0x0000ffff) #define HWFLAG_MASK (0xffff << 16) static void dwmmc_get1paddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) { if (nsegs != 1) panic("%s: nsegs != 1 (%d)\n", __func__, nsegs); if (error != 0) panic("%s: error != 0 (%d)\n", __func__, error); *(bus_addr_t *)arg = segs[0].ds_addr; } static void dwmmc_ring_setup(void *arg, bus_dma_segment_t *segs, int nsegs, int error) { struct dwmmc_softc *sc; int idx; sc = arg; dprintf("nsegs %d seg0len %lu\n", nsegs, segs[0].ds_len); if (error != 0) panic("%s: error != 0 (%d)\n", __func__, error); for (idx = 0; idx < nsegs; idx++) { sc->desc_ring[idx].des0 = DES0_DIC | DES0_CH; sc->desc_ring[idx].des1 = segs[idx].ds_len & DES1_BS1_MASK; sc->desc_ring[idx].des2 = segs[idx].ds_addr; if (idx == 0) sc->desc_ring[idx].des0 |= DES0_FS; if (idx == (nsegs - 1)) { sc->desc_ring[idx].des0 &= ~(DES0_DIC | DES0_CH); sc->desc_ring[idx].des0 |= DES0_LD; } wmb(); sc->desc_ring[idx].des0 |= DES0_OWN; } } static int dwmmc_ctrl_reset(struct dwmmc_softc *sc, int reset_bits) { int reg; int i; reg = READ4(sc, SDMMC_CTRL); reg |= (reset_bits); WRITE4(sc, SDMMC_CTRL, reg); /* Wait reset done */ for (i = 0; i < 100; i++) { if (!(READ4(sc, SDMMC_CTRL) & reset_bits)) return (0); DELAY(10); } device_printf(sc->dev, "Reset failed\n"); return (1); } static int dma_setup(struct dwmmc_softc *sc) { int error; int nidx; int idx; /* * Set up TX descriptor ring, descriptors, and dma maps. */ error = bus_dma_tag_create( bus_get_dma_tag(sc->dev), /* Parent tag. */ 4096, 0, /* alignment, boundary */ BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ IDMAC_DESC_SIZE, 1, /* maxsize, nsegments */ IDMAC_DESC_SIZE, /* maxsegsize */ 0, /* flags */ NULL, NULL, /* lockfunc, lockarg */ &sc->desc_tag); if (error != 0) { device_printf(sc->dev, "could not create ring DMA tag.\n"); return (1); } error = bus_dmamem_alloc(sc->desc_tag, (void**)&sc->desc_ring, BUS_DMA_COHERENT | BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->desc_map); if (error != 0) { device_printf(sc->dev, "could not allocate descriptor ring.\n"); return (1); } error = bus_dmamap_load(sc->desc_tag, sc->desc_map, sc->desc_ring, IDMAC_DESC_SIZE, dwmmc_get1paddr, &sc->desc_ring_paddr, 0); if (error != 0) { device_printf(sc->dev, "could not load descriptor ring map.\n"); return (1); } for (idx = 0; idx < IDMAC_DESC_SEGS; idx++) { sc->desc_ring[idx].des0 = DES0_CH; sc->desc_ring[idx].des1 = 0; nidx = (idx + 1) % IDMAC_DESC_SEGS; sc->desc_ring[idx].des3 = sc->desc_ring_paddr + \ (nidx * sizeof(struct idmac_desc)); } sc->desc_ring[idx - 1].des3 = sc->desc_ring_paddr; sc->desc_ring[idx - 1].des0 |= DES0_ER; error = bus_dma_tag_create( bus_get_dma_tag(sc->dev), /* Parent tag. */ 8, 0, /* alignment, boundary */ BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ IDMAC_MAX_SIZE * IDMAC_DESC_SEGS, /* maxsize */ IDMAC_DESC_SEGS, /* nsegments */ IDMAC_MAX_SIZE, /* maxsegsize */ 0, /* flags */ NULL, NULL, /* lockfunc, lockarg */ &sc->buf_tag); if (error != 0) { device_printf(sc->dev, "could not create ring DMA tag.\n"); return (1); } error = bus_dmamap_create(sc->buf_tag, 0, &sc->buf_map); if (error != 0) { device_printf(sc->dev, "could not create TX buffer DMA map.\n"); return (1); } return (0); } static void dwmmc_cmd_done(struct dwmmc_softc *sc) { struct mmc_command *cmd; #ifdef MMCCAM union ccb *ccb; #endif #ifdef MMCCAM ccb = sc->ccb; if (ccb == NULL) return; cmd = &ccb->mmcio.cmd; #else cmd = sc->curcmd; #endif if (cmd == NULL) return; if (cmd->flags & MMC_RSP_PRESENT) { if (cmd->flags & MMC_RSP_136) { cmd->resp[3] = READ4(sc, SDMMC_RESP0); cmd->resp[2] = READ4(sc, SDMMC_RESP1); cmd->resp[1] = READ4(sc, SDMMC_RESP2); cmd->resp[0] = READ4(sc, SDMMC_RESP3); } else { cmd->resp[3] = 0; cmd->resp[2] = 0; cmd->resp[1] = 0; cmd->resp[0] = READ4(sc, SDMMC_RESP0); } } } static void dwmmc_tasklet(struct dwmmc_softc *sc) { struct mmc_command *cmd; cmd = sc->curcmd; if (cmd == NULL) return; if (!sc->cmd_done) return; if (cmd->error != MMC_ERR_NONE || !cmd->data) { dwmmc_next_operation(sc); } else if (cmd->data && sc->dto_rcvd) { if ((cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK || cmd->opcode == MMC_READ_MULTIPLE_BLOCK) && sc->use_auto_stop) { if (sc->acd_rcvd) dwmmc_next_operation(sc); } else { dwmmc_next_operation(sc); } } } static void dwmmc_intr(void *arg) { struct mmc_command *cmd; struct dwmmc_softc *sc; uint32_t reg; sc = arg; DWMMC_LOCK(sc); cmd = sc->curcmd; /* First handle SDMMC controller interrupts */ reg = READ4(sc, SDMMC_MINTSTS); if (reg) { dprintf("%s 0x%08x\n", __func__, reg); if (reg & DWMMC_CMD_ERR_FLAGS) { dprintf("cmd err 0x%08x cmd 0x%08x\n", reg, cmd->opcode); cmd->error = MMC_ERR_TIMEOUT; } if (reg & DWMMC_DATA_ERR_FLAGS) { dprintf("data err 0x%08x cmd 0x%08x\n", reg, cmd->opcode); cmd->error = MMC_ERR_FAILED; if (!sc->use_pio) { dma_done(sc, cmd); dma_stop(sc); } } if (reg & SDMMC_INTMASK_CMD_DONE) { dwmmc_cmd_done(sc); sc->cmd_done = 1; } if (reg & SDMMC_INTMASK_ACD) sc->acd_rcvd = 1; if (reg & SDMMC_INTMASK_DTO) sc->dto_rcvd = 1; if (reg & SDMMC_INTMASK_CD) { dwmmc_handle_card_present(sc, READ4(sc, SDMMC_CDETECT) == 0 ? true : false); } } /* Ack interrupts */ WRITE4(sc, SDMMC_RINTSTS, reg); if (sc->use_pio) { if (reg & (SDMMC_INTMASK_RXDR|SDMMC_INTMASK_DTO)) { pio_read(sc, cmd); } if (reg & (SDMMC_INTMASK_TXDR|SDMMC_INTMASK_DTO)) { pio_write(sc, cmd); } } else { /* Now handle DMA interrupts */ reg = READ4(sc, SDMMC_IDSTS); if (reg) { dprintf("dma intr 0x%08x\n", reg); if (reg & (SDMMC_IDINTEN_TI | SDMMC_IDINTEN_RI)) { WRITE4(sc, SDMMC_IDSTS, (SDMMC_IDINTEN_TI | SDMMC_IDINTEN_RI)); WRITE4(sc, SDMMC_IDSTS, SDMMC_IDINTEN_NI); dma_done(sc, cmd); } } } dwmmc_tasklet(sc); DWMMC_UNLOCK(sc); } static void dwmmc_handle_card_present(struct dwmmc_softc *sc, bool is_present) { bool was_present; if (dumping || SCHEDULER_STOPPED()) return; was_present = sc->child != NULL; if (!was_present && is_present) { taskqueue_enqueue_timeout(taskqueue_swi_giant, &sc->card_delayed_task, -(hz / 2)); } else if (was_present && !is_present) { taskqueue_enqueue(taskqueue_swi_giant, &sc->card_task); } } static void dwmmc_card_task(void *arg, int pending __unused) { struct dwmmc_softc *sc = arg; #ifdef MMCCAM mmc_cam_sim_discover(&sc->mmc_sim); #else DWMMC_LOCK(sc); if (READ4(sc, SDMMC_CDETECT) == 0 || (sc->mmc_helper.props & MMC_PROP_BROKEN_CD)) { if (sc->child == NULL) { if (bootverbose) device_printf(sc->dev, "Card inserted\n"); sc->child = device_add_child(sc->dev, "mmc", -1); DWMMC_UNLOCK(sc); if (sc->child) { device_set_ivars(sc->child, sc); (void)device_probe_and_attach(sc->child); } } else DWMMC_UNLOCK(sc); } else { /* Card isn't present, detach if necessary */ if (sc->child != NULL) { if (bootverbose) device_printf(sc->dev, "Card removed\n"); DWMMC_UNLOCK(sc); device_delete_child(sc->dev, sc->child); sc->child = NULL; } else DWMMC_UNLOCK(sc); } #endif /* MMCCAM */ } static int parse_fdt(struct dwmmc_softc *sc) { pcell_t dts_value[3]; phandle_t node; uint32_t bus_hz = 0; int len; int error; if ((node = ofw_bus_get_node(sc->dev)) == -1) return (ENXIO); /* Set some defaults for freq and supported mode */ sc->host.f_min = 400000; sc->host.f_max = 200000000; sc->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; sc->host.caps = MMC_CAP_HSPEED | MMC_CAP_SIGNALING_330; mmc_fdt_parse(sc->dev, node, &sc->mmc_helper, &sc->host); /* fifo-depth */ if ((len = OF_getproplen(node, "fifo-depth")) > 0) { OF_getencprop(node, "fifo-depth", dts_value, len); sc->fifo_depth = dts_value[0]; } /* num-slots (Deprecated) */ sc->num_slots = 1; if ((len = OF_getproplen(node, "num-slots")) > 0) { device_printf(sc->dev, "num-slots property is deprecated\n"); OF_getencprop(node, "num-slots", dts_value, len); sc->num_slots = dts_value[0]; } /* clock-frequency */ if ((len = OF_getproplen(node, "clock-frequency")) > 0) { OF_getencprop(node, "clock-frequency", dts_value, len); bus_hz = dts_value[0]; } /* IP block reset is optional */ error = hwreset_get_by_ofw_name(sc->dev, 0, "reset", &sc->hwreset); if (error != 0 && error != ENOENT && error != ENODEV) { device_printf(sc->dev, "Cannot get reset\n"); goto fail; } /* vmmc regulator is optional */ error = regulator_get_by_ofw_property(sc->dev, 0, "vmmc-supply", &sc->vmmc); if (error != 0 && error != ENOENT && error != ENODEV) { device_printf(sc->dev, "Cannot get regulator 'vmmc-supply'\n"); goto fail; } /* vqmmc regulator is optional */ error = regulator_get_by_ofw_property(sc->dev, 0, "vqmmc-supply", &sc->vqmmc); if (error != 0 && error != ENOENT && error != ENODEV) { device_printf(sc->dev, "Cannot get regulator 'vqmmc-supply'\n"); goto fail; } /* Assert reset first */ if (sc->hwreset != NULL) { error = hwreset_assert(sc->hwreset); if (error != 0) { device_printf(sc->dev, "Cannot assert reset\n"); goto fail; } } /* BIU (Bus Interface Unit clock) is optional */ error = clk_get_by_ofw_name(sc->dev, 0, "biu", &sc->biu); if (error != 0 && error != ENOENT && error != ENODEV) { device_printf(sc->dev, "Cannot get 'biu' clock\n"); goto fail; } if (sc->biu) { error = clk_enable(sc->biu); if (error != 0) { device_printf(sc->dev, "cannot enable biu clock\n"); goto fail; } } /* * CIU (Controller Interface Unit clock) is mandatory * if no clock-frequency property is given */ error = clk_get_by_ofw_name(sc->dev, 0, "ciu", &sc->ciu); if (error != 0 && error != ENOENT && error != ENODEV) { device_printf(sc->dev, "Cannot get 'ciu' clock\n"); goto fail; } if (sc->ciu) { if (bus_hz != 0) { error = clk_set_freq(sc->ciu, bus_hz, 0); if (error != 0) device_printf(sc->dev, "cannot set ciu clock to %u\n", bus_hz); } error = clk_enable(sc->ciu); if (error != 0) { device_printf(sc->dev, "cannot enable ciu clock\n"); goto fail; } clk_get_freq(sc->ciu, &sc->bus_hz); } /* Enable regulators */ if (sc->vmmc != NULL) { error = regulator_enable(sc->vmmc); if (error != 0) { device_printf(sc->dev, "Cannot enable vmmc regulator\n"); goto fail; } } if (sc->vqmmc != NULL) { error = regulator_enable(sc->vqmmc); if (error != 0) { device_printf(sc->dev, "Cannot enable vqmmc regulator\n"); goto fail; } } /* Take dwmmc out of reset */ if (sc->hwreset != NULL) { error = hwreset_deassert(sc->hwreset); if (error != 0) { device_printf(sc->dev, "Cannot deassert reset\n"); goto fail; } } if (sc->bus_hz == 0) { device_printf(sc->dev, "No bus speed provided\n"); goto fail; } return (0); fail: return (ENXIO); } int dwmmc_attach(device_t dev) { struct dwmmc_softc *sc; int error; sc = device_get_softc(dev); sc->dev = dev; /* Why not to use Auto Stop? It save a hundred of irq per second */ sc->use_auto_stop = 1; error = parse_fdt(sc); if (error != 0) { device_printf(dev, "Can't get FDT property.\n"); return (ENXIO); } DWMMC_LOCK_INIT(sc); if (bus_alloc_resources(dev, dwmmc_spec, sc->res)) { device_printf(dev, "could not allocate resources\n"); return (ENXIO); } /* Setup interrupt handler. */ error = bus_setup_intr(dev, sc->res[1], INTR_TYPE_NET | INTR_MPSAFE, NULL, dwmmc_intr, sc, &sc->intr_cookie); if (error != 0) { device_printf(dev, "could not setup interrupt handler.\n"); return (ENXIO); } device_printf(dev, "Hardware version ID is %04x\n", READ4(sc, SDMMC_VERID) & 0xffff); /* Reset all */ if (dwmmc_ctrl_reset(sc, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET))) return (ENXIO); dwmmc_setup_bus(sc, sc->host.f_min); if (sc->fifo_depth == 0) { sc->fifo_depth = 1 + ((READ4(sc, SDMMC_FIFOTH) >> SDMMC_FIFOTH_RXWMARK_S) & 0xfff); device_printf(dev, "No fifo-depth, using FIFOTH %x\n", sc->fifo_depth); } if (!sc->use_pio) { dma_stop(sc); if (dma_setup(sc)) return (ENXIO); /* Install desc base */ WRITE4(sc, SDMMC_DBADDR, sc->desc_ring_paddr); /* Enable DMA interrupts */ WRITE4(sc, SDMMC_IDSTS, SDMMC_IDINTEN_MASK); WRITE4(sc, SDMMC_IDINTEN, (SDMMC_IDINTEN_NI | SDMMC_IDINTEN_RI | SDMMC_IDINTEN_TI)); } /* Clear and disable interrups for a while */ WRITE4(sc, SDMMC_RINTSTS, 0xffffffff); WRITE4(sc, SDMMC_INTMASK, 0); /* Maximum timeout */ WRITE4(sc, SDMMC_TMOUT, 0xffffffff); /* Enable interrupts */ WRITE4(sc, SDMMC_RINTSTS, 0xffffffff); WRITE4(sc, SDMMC_INTMASK, (SDMMC_INTMASK_CMD_DONE | SDMMC_INTMASK_DTO | SDMMC_INTMASK_ACD | SDMMC_INTMASK_TXDR | SDMMC_INTMASK_RXDR | DWMMC_ERR_FLAGS | SDMMC_INTMASK_CD)); WRITE4(sc, SDMMC_CTRL, SDMMC_CTRL_INT_ENABLE); TASK_INIT(&sc->card_task, 0, dwmmc_card_task, sc); TIMEOUT_TASK_INIT(taskqueue_swi_giant, &sc->card_delayed_task, 0, dwmmc_card_task, sc); #ifdef MMCCAM sc->ccb = NULL; if (mmc_cam_sim_alloc(dev, "dw_mmc", &sc->mmc_sim) != 0) { device_printf(dev, "cannot alloc cam sim\n"); dwmmc_detach(dev); return (ENXIO); } #endif /* * Schedule a card detection as we won't get an interrupt * if the card is inserted when we attach */ dwmmc_card_task(sc, 0); return (0); } int dwmmc_detach(device_t dev) { struct dwmmc_softc *sc; int ret; sc = device_get_softc(dev); ret = device_delete_children(dev); if (ret != 0) return (ret); taskqueue_drain(taskqueue_swi_giant, &sc->card_task); taskqueue_drain_timeout(taskqueue_swi_giant, &sc->card_delayed_task); if (sc->intr_cookie != NULL) { ret = bus_teardown_intr(dev, sc->res[1], sc->intr_cookie); if (ret != 0) return (ret); } bus_release_resources(dev, dwmmc_spec, sc->res); DWMMC_LOCK_DESTROY(sc); if (sc->hwreset != NULL && hwreset_deassert(sc->hwreset) != 0) device_printf(sc->dev, "cannot deassert reset\n"); if (sc->biu != NULL && clk_disable(sc->biu) != 0) device_printf(sc->dev, "cannot disable biu clock\n"); if (sc->ciu != NULL && clk_disable(sc->ciu) != 0) device_printf(sc->dev, "cannot disable ciu clock\n"); if (sc->vmmc && regulator_disable(sc->vmmc) != 0) device_printf(sc->dev, "Cannot disable vmmc regulator\n"); if (sc->vqmmc && regulator_disable(sc->vqmmc) != 0) device_printf(sc->dev, "Cannot disable vqmmc regulator\n"); #ifdef MMCCAM mmc_cam_sim_free(&sc->mmc_sim); #endif return (0); } static int dwmmc_setup_bus(struct dwmmc_softc *sc, int freq) { int tout; int div; if (freq == 0) { WRITE4(sc, SDMMC_CLKENA, 0); WRITE4(sc, SDMMC_CMD, (SDMMC_CMD_WAIT_PRVDATA | SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START)); tout = 1000; do { if (tout-- < 0) { device_printf(sc->dev, "Failed update clk\n"); return (1); } } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); return (0); } WRITE4(sc, SDMMC_CLKENA, 0); WRITE4(sc, SDMMC_CLKSRC, 0); div = (sc->bus_hz != freq) ? DIV_ROUND_UP(sc->bus_hz, 2 * freq) : 0; WRITE4(sc, SDMMC_CLKDIV, div); WRITE4(sc, SDMMC_CMD, (SDMMC_CMD_WAIT_PRVDATA | SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START)); tout = 1000; do { if (tout-- < 0) { device_printf(sc->dev, "Failed to update clk\n"); return (1); } } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); WRITE4(sc, SDMMC_CLKENA, (SDMMC_CLKENA_CCLK_EN | SDMMC_CLKENA_LP)); WRITE4(sc, SDMMC_CMD, SDMMC_CMD_WAIT_PRVDATA | SDMMC_CMD_UPD_CLK_ONLY | SDMMC_CMD_START); tout = 1000; do { if (tout-- < 0) { device_printf(sc->dev, "Failed to enable clk\n"); return (1); } } while (READ4(sc, SDMMC_CMD) & SDMMC_CMD_START); return (0); } static int dwmmc_update_ios(device_t brdev, device_t reqdev) { struct dwmmc_softc *sc; struct mmc_ios *ios; uint32_t reg; int ret = 0; sc = device_get_softc(brdev); ios = &sc->host.ios; dprintf("Setting up clk %u bus_width %d, timing: %d\n", ios->clock, ios->bus_width, ios->timing); switch (ios->power_mode) { case power_on: break; case power_off: WRITE4(sc, SDMMC_PWREN, 0); break; case power_up: WRITE4(sc, SDMMC_PWREN, 1); break; } mmc_fdt_set_power(&sc->mmc_helper, ios->power_mode); if (ios->bus_width == bus_width_8) WRITE4(sc, SDMMC_CTYPE, SDMMC_CTYPE_8BIT); else if (ios->bus_width == bus_width_4) WRITE4(sc, SDMMC_CTYPE, SDMMC_CTYPE_4BIT); else WRITE4(sc, SDMMC_CTYPE, 0); if ((sc->hwtype & HWTYPE_MASK) == HWTYPE_EXYNOS) { /* XXX: take care about DDR or SDR use here */ WRITE4(sc, SDMMC_CLKSEL, sc->sdr_timing); } /* Set DDR mode */ reg = READ4(sc, SDMMC_UHS_REG); if (ios->timing == bus_timing_uhs_ddr50 || ios->timing == bus_timing_mmc_ddr52 || ios->timing == bus_timing_mmc_hs400) reg |= (SDMMC_UHS_REG_DDR); else reg &= ~(SDMMC_UHS_REG_DDR); WRITE4(sc, SDMMC_UHS_REG, reg); if (sc->update_ios) ret = sc->update_ios(sc, ios); dwmmc_setup_bus(sc, ios->clock); return (ret); } static int dma_done(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; data = cmd->data; if (data->flags & MMC_DATA_WRITE) bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_POSTWRITE); else bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_POSTREAD); bus_dmamap_sync(sc->desc_tag, sc->desc_map, BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->buf_tag, sc->buf_map); return (0); } static int dma_stop(struct dwmmc_softc *sc) { int reg; reg = READ4(sc, SDMMC_CTRL); reg &= ~(SDMMC_CTRL_USE_IDMAC); reg |= (SDMMC_CTRL_DMA_RESET); WRITE4(sc, SDMMC_CTRL, reg); reg = READ4(sc, SDMMC_BMOD); reg &= ~(SDMMC_BMOD_DE | SDMMC_BMOD_FB); reg |= (SDMMC_BMOD_SWR); WRITE4(sc, SDMMC_BMOD, reg); return (0); } static int dma_prepare(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; int err; int reg; data = cmd->data; reg = READ4(sc, SDMMC_INTMASK); reg &= ~(SDMMC_INTMASK_TXDR | SDMMC_INTMASK_RXDR); WRITE4(sc, SDMMC_INTMASK, reg); dprintf("%s: bus_dmamap_load size: %zu\n", __func__, data->len); err = bus_dmamap_load(sc->buf_tag, sc->buf_map, data->data, data->len, dwmmc_ring_setup, sc, BUS_DMA_NOWAIT); if (err != 0) panic("dmamap_load failed\n"); /* Ensure the device can see the desc */ bus_dmamap_sync(sc->desc_tag, sc->desc_map, BUS_DMASYNC_PREWRITE); if (data->flags & MMC_DATA_WRITE) bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_PREWRITE); else bus_dmamap_sync(sc->buf_tag, sc->buf_map, BUS_DMASYNC_PREREAD); reg = (DEF_MSIZE << SDMMC_FIFOTH_MSIZE_S); reg |= ((sc->fifo_depth / 2) - 1) << SDMMC_FIFOTH_RXWMARK_S; reg |= (sc->fifo_depth / 2) << SDMMC_FIFOTH_TXWMARK_S; WRITE4(sc, SDMMC_FIFOTH, reg); wmb(); reg = READ4(sc, SDMMC_CTRL); reg |= (SDMMC_CTRL_USE_IDMAC | SDMMC_CTRL_DMA_ENABLE); WRITE4(sc, SDMMC_CTRL, reg); wmb(); reg = READ4(sc, SDMMC_BMOD); reg |= (SDMMC_BMOD_DE | SDMMC_BMOD_FB); WRITE4(sc, SDMMC_BMOD, reg); /* Start */ WRITE4(sc, SDMMC_PLDMND, 1); return (0); } static int pio_prepare(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; int reg; data = cmd->data; data->xfer_len = 0; reg = (DEF_MSIZE << SDMMC_FIFOTH_MSIZE_S); reg |= ((sc->fifo_depth / 2) - 1) << SDMMC_FIFOTH_RXWMARK_S; reg |= (sc->fifo_depth / 2) << SDMMC_FIFOTH_TXWMARK_S; WRITE4(sc, SDMMC_FIFOTH, reg); wmb(); return (0); } static void pio_read(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; uint32_t *p, status; if (cmd == NULL || cmd->data == NULL) return; data = cmd->data; if ((data->flags & MMC_DATA_READ) == 0) return; KASSERT((data->xfer_len & 3) == 0, ("xfer_len not aligned")); p = (uint32_t *)data->data + (data->xfer_len >> 2); while (data->xfer_len < data->len) { status = READ4(sc, SDMMC_STATUS); if (status & SDMMC_STATUS_FIFO_EMPTY) break; *p++ = READ4(sc, SDMMC_DATA); data->xfer_len += 4; } WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_RXDR); } static void pio_write(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; uint32_t *p, status; if (cmd == NULL || cmd->data == NULL) return; data = cmd->data; if ((data->flags & MMC_DATA_WRITE) == 0) return; KASSERT((data->xfer_len & 3) == 0, ("xfer_len not aligned")); p = (uint32_t *)data->data + (data->xfer_len >> 2); while (data->xfer_len < data->len) { status = READ4(sc, SDMMC_STATUS); if (status & SDMMC_STATUS_FIFO_FULL) break; WRITE4(sc, SDMMC_DATA, *p++); data->xfer_len += 4; } WRITE4(sc, SDMMC_RINTSTS, SDMMC_INTMASK_TXDR); } static void dwmmc_start_cmd(struct dwmmc_softc *sc, struct mmc_command *cmd) { struct mmc_data *data; uint32_t blksz; uint32_t cmdr; dprintf("%s\n", __func__); sc->curcmd = cmd; data = cmd->data; #ifndef MMCCAM /* XXX Upper layers don't always set this */ cmd->mrq = sc->req; #endif /* Begin setting up command register. */ cmdr = cmd->opcode; dprintf("cmd->opcode 0x%08x\n", cmd->opcode); if (cmd->opcode == MMC_STOP_TRANSMISSION || cmd->opcode == MMC_GO_IDLE_STATE || cmd->opcode == MMC_GO_INACTIVE_STATE) cmdr |= SDMMC_CMD_STOP_ABORT; else if (cmd->opcode != MMC_SEND_STATUS && data) cmdr |= SDMMC_CMD_WAIT_PRVDATA; /* Set up response handling. */ if (MMC_RSP(cmd->flags) != MMC_RSP_NONE) { cmdr |= SDMMC_CMD_RESP_EXP; if (cmd->flags & MMC_RSP_136) cmdr |= SDMMC_CMD_RESP_LONG; } if (cmd->flags & MMC_RSP_CRC) cmdr |= SDMMC_CMD_RESP_CRC; /* * XXX: Not all platforms want this. */ cmdr |= SDMMC_CMD_USE_HOLD_REG; if ((sc->flags & CARD_INIT_DONE) == 0) { sc->flags |= (CARD_INIT_DONE); cmdr |= SDMMC_CMD_SEND_INIT; } if (data) { if ((cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK || cmd->opcode == MMC_READ_MULTIPLE_BLOCK) && sc->use_auto_stop) cmdr |= SDMMC_CMD_SEND_ASTOP; cmdr |= SDMMC_CMD_DATA_EXP; if (data->flags & MMC_DATA_STREAM) cmdr |= SDMMC_CMD_MODE_STREAM; if (data->flags & MMC_DATA_WRITE) cmdr |= SDMMC_CMD_DATA_WRITE; WRITE4(sc, SDMMC_TMOUT, 0xffffffff); #ifdef MMCCAM if (cmd->data->flags & MMC_DATA_BLOCK_SIZE) { WRITE4(sc, SDMMC_BLKSIZ, cmd->data->block_size); WRITE4(sc, SDMMC_BYTCNT, cmd->data->len); } else #endif { WRITE4(sc, SDMMC_BYTCNT, data->len); blksz = (data->len < MMC_SECTOR_SIZE) ? \ data->len : MMC_SECTOR_SIZE; WRITE4(sc, SDMMC_BLKSIZ, blksz); } if (sc->use_pio) { pio_prepare(sc, cmd); } else { dma_prepare(sc, cmd); } wmb(); } dprintf("cmdr 0x%08x\n", cmdr); WRITE4(sc, SDMMC_CMDARG, cmd->arg); wmb(); WRITE4(sc, SDMMC_CMD, cmdr | SDMMC_CMD_START); }; static void dwmmc_next_operation(struct dwmmc_softc *sc) { struct mmc_command *cmd; dprintf("%s\n", __func__); #ifdef MMCCAM union ccb *ccb; ccb = sc->ccb; if (ccb == NULL) return; cmd = &ccb->mmcio.cmd; #else struct mmc_request *req; req = sc->req; if (req == NULL) return; cmd = req->cmd; #endif sc->acd_rcvd = 0; sc->dto_rcvd = 0; sc->cmd_done = 0; /* * XXX: Wait until card is still busy. * We do need this to prevent data timeouts, * mostly caused by multi-block write command * followed by single-read. */ while(READ4(sc, SDMMC_STATUS) & (SDMMC_STATUS_DATA_BUSY)) continue; if (sc->flags & PENDING_CMD) { sc->flags &= ~PENDING_CMD; dwmmc_start_cmd(sc, cmd); return; } else if (sc->flags & PENDING_STOP && !sc->use_auto_stop) { sc->flags &= ~PENDING_STOP; /// XXX: What to do with this? //dwmmc_start_cmd(sc, req->stop); return; } #ifdef MMCCAM sc->ccb = NULL; sc->curcmd = NULL; ccb->ccb_h.status = (ccb->mmcio.cmd.error == 0 ? CAM_REQ_CMP : CAM_REQ_CMP_ERR); xpt_done(ccb); #else sc->req = NULL; sc->curcmd = NULL; req->done(req); #endif } static int dwmmc_request(device_t brdev, device_t reqdev, struct mmc_request *req) { struct dwmmc_softc *sc; sc = device_get_softc(brdev); dprintf("%s\n", __func__); DWMMC_LOCK(sc); #ifdef MMCCAM sc->flags |= PENDING_CMD; #else if (sc->req != NULL) { DWMMC_UNLOCK(sc); return (EBUSY); } sc->req = req; sc->flags |= PENDING_CMD; if (sc->req->stop) sc->flags |= PENDING_STOP; #endif dwmmc_next_operation(sc); DWMMC_UNLOCK(sc); return (0); } #ifndef MMCCAM static int dwmmc_get_ro(device_t brdev, device_t reqdev) { dprintf("%s\n", __func__); return (0); } static int dwmmc_acquire_host(device_t brdev, device_t reqdev) { struct dwmmc_softc *sc; sc = device_get_softc(brdev); DWMMC_LOCK(sc); while (sc->bus_busy) msleep(sc, &sc->sc_mtx, PZERO, "dwmmcah", hz / 5); sc->bus_busy++; DWMMC_UNLOCK(sc); return (0); } static int dwmmc_release_host(device_t brdev, device_t reqdev) { struct dwmmc_softc *sc; sc = device_get_softc(brdev); DWMMC_LOCK(sc); sc->bus_busy--; wakeup(sc); DWMMC_UNLOCK(sc); return (0); } #endif /* !MMCCAM */ static int dwmmc_read_ivar(device_t bus, device_t child, int which, uintptr_t *result) { struct dwmmc_softc *sc; sc = device_get_softc(bus); switch (which) { default: return (EINVAL); case MMCBR_IVAR_BUS_MODE: *(int *)result = sc->host.ios.bus_mode; break; case MMCBR_IVAR_BUS_WIDTH: *(int *)result = sc->host.ios.bus_width; break; case MMCBR_IVAR_CHIP_SELECT: *(int *)result = sc->host.ios.chip_select; break; case MMCBR_IVAR_CLOCK: *(int *)result = sc->host.ios.clock; break; case MMCBR_IVAR_F_MIN: *(int *)result = sc->host.f_min; break; case MMCBR_IVAR_F_MAX: *(int *)result = sc->host.f_max; break; case MMCBR_IVAR_HOST_OCR: *(int *)result = sc->host.host_ocr; break; case MMCBR_IVAR_MODE: *(int *)result = sc->host.mode; break; case MMCBR_IVAR_OCR: *(int *)result = sc->host.ocr; break; case MMCBR_IVAR_POWER_MODE: *(int *)result = sc->host.ios.power_mode; break; case MMCBR_IVAR_VDD: *(int *)result = sc->host.ios.vdd; break; case MMCBR_IVAR_VCCQ: *(int *)result = sc->host.ios.vccq; break; case MMCBR_IVAR_CAPS: *(int *)result = sc->host.caps; break; case MMCBR_IVAR_MAX_DATA: *(int *)result = DWMMC_MAX_DATA; break; case MMCBR_IVAR_TIMING: *(int *)result = sc->host.ios.timing; break; } return (0); } static int dwmmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) { struct dwmmc_softc *sc; sc = device_get_softc(bus); switch (which) { default: return (EINVAL); case MMCBR_IVAR_BUS_MODE: sc->host.ios.bus_mode = value; break; case MMCBR_IVAR_BUS_WIDTH: sc->host.ios.bus_width = value; break; case MMCBR_IVAR_CHIP_SELECT: sc->host.ios.chip_select = value; break; case MMCBR_IVAR_CLOCK: sc->host.ios.clock = value; break; case MMCBR_IVAR_MODE: sc->host.mode = value; break; case MMCBR_IVAR_OCR: sc->host.ocr = value; break; case MMCBR_IVAR_POWER_MODE: sc->host.ios.power_mode = value; break; case MMCBR_IVAR_VDD: sc->host.ios.vdd = value; break; case MMCBR_IVAR_TIMING: sc->host.ios.timing = value; break; case MMCBR_IVAR_VCCQ: sc->host.ios.vccq = value; break; /* These are read-only */ case MMCBR_IVAR_CAPS: case MMCBR_IVAR_HOST_OCR: case MMCBR_IVAR_F_MIN: case MMCBR_IVAR_F_MAX: case MMCBR_IVAR_MAX_DATA: return (EINVAL); } return (0); } #ifdef MMCCAM /* Note: this function likely belongs to the specific driver impl */ static int dwmmc_switch_vccq(device_t dev, device_t child) { device_printf(dev, "This is a default impl of switch_vccq() that always fails\n"); return EINVAL; } static int dwmmc_get_tran_settings(device_t dev, struct ccb_trans_settings_mmc *cts) { struct dwmmc_softc *sc; sc = device_get_softc(dev); cts->host_ocr = sc->host.host_ocr; cts->host_f_min = sc->host.f_min; cts->host_f_max = sc->host.f_max; cts->host_caps = sc->host.caps; cts->host_max_data = DWMMC_MAX_DATA; memcpy(&cts->ios, &sc->host.ios, sizeof(struct mmc_ios)); return (0); } static int dwmmc_set_tran_settings(device_t dev, struct ccb_trans_settings_mmc *cts) { struct dwmmc_softc *sc; struct mmc_ios *ios; struct mmc_ios *new_ios; int res; sc = device_get_softc(dev); ios = &sc->host.ios; new_ios = &cts->ios; /* Update only requested fields */ if (cts->ios_valid & MMC_CLK) { ios->clock = new_ios->clock; if (bootverbose) device_printf(sc->dev, "Clock => %d\n", ios->clock); } if (cts->ios_valid & MMC_VDD) { ios->vdd = new_ios->vdd; if (bootverbose) device_printf(sc->dev, "VDD => %d\n", ios->vdd); } if (cts->ios_valid & MMC_CS) { ios->chip_select = new_ios->chip_select; if (bootverbose) device_printf(sc->dev, "CS => %d\n", ios->chip_select); } if (cts->ios_valid & MMC_BW) { ios->bus_width = new_ios->bus_width; if (bootverbose) device_printf(sc->dev, "Bus width => %d\n", ios->bus_width); } if (cts->ios_valid & MMC_PM) { ios->power_mode = new_ios->power_mode; if (bootverbose) device_printf(sc->dev, "Power mode => %d\n", ios->power_mode); } if (cts->ios_valid & MMC_BT) { ios->timing = new_ios->timing; if (bootverbose) device_printf(sc->dev, "Timing => %d\n", ios->timing); } if (cts->ios_valid & MMC_BM) { ios->bus_mode = new_ios->bus_mode; if (bootverbose) device_printf(sc->dev, "Bus mode => %d\n", ios->bus_mode); } if (cts->ios_valid & MMC_VCCQ) { ios->vccq = new_ios->vccq; if (bootverbose) device_printf(sc->dev, "VCCQ => %d\n", ios->vccq); res = dwmmc_switch_vccq(sc->dev, NULL); device_printf(sc->dev, "VCCQ switch result: %d\n", res); } return (dwmmc_update_ios(sc->dev, NULL)); } static int dwmmc_cam_request(device_t dev, union ccb *ccb) { struct dwmmc_softc *sc; struct ccb_mmcio *mmcio; sc = device_get_softc(dev); mmcio = &ccb->mmcio; DWMMC_LOCK(sc); #ifdef DEBUG if (__predict_false(bootverbose)) { device_printf(sc->dev, "CMD%u arg %#x flags %#x dlen %u dflags %#x\n", mmcio->cmd.opcode, mmcio->cmd.arg, mmcio->cmd.flags, mmcio->cmd.data != NULL ? (unsigned int) mmcio->cmd.data->len : 0, mmcio->cmd.data != NULL ? mmcio->cmd.data->flags: 0); } #endif if (mmcio->cmd.data != NULL) { if (mmcio->cmd.data->len == 0 || mmcio->cmd.data->flags == 0) panic("data->len = %d, data->flags = %d -- something is b0rked", (int)mmcio->cmd.data->len, mmcio->cmd.data->flags); } if (sc->ccb != NULL) { device_printf(sc->dev, "Controller still has an active command\n"); return (EBUSY); } sc->ccb = ccb; DWMMC_UNLOCK(sc); dwmmc_request(sc->dev, NULL, NULL); return (0); } static void dwmmc_cam_poll(device_t dev) { struct dwmmc_softc *sc; sc = device_get_softc(dev); dwmmc_intr(sc); } #endif /* MMCCAM */ static device_method_t dwmmc_methods[] = { /* Bus interface */ DEVMETHOD(bus_read_ivar, dwmmc_read_ivar), DEVMETHOD(bus_write_ivar, dwmmc_write_ivar), #ifndef MMCCAM /* mmcbr_if */ DEVMETHOD(mmcbr_update_ios, dwmmc_update_ios), DEVMETHOD(mmcbr_request, dwmmc_request), DEVMETHOD(mmcbr_get_ro, dwmmc_get_ro), DEVMETHOD(mmcbr_acquire_host, dwmmc_acquire_host), DEVMETHOD(mmcbr_release_host, dwmmc_release_host), #endif #ifdef MMCCAM /* MMCCAM interface */ DEVMETHOD(mmc_sim_get_tran_settings, dwmmc_get_tran_settings), DEVMETHOD(mmc_sim_set_tran_settings, dwmmc_set_tran_settings), DEVMETHOD(mmc_sim_cam_request, dwmmc_cam_request), DEVMETHOD(mmc_sim_cam_poll, dwmmc_cam_poll), DEVMETHOD(bus_add_child, bus_generic_add_child), #endif DEVMETHOD_END }; DEFINE_CLASS_0(dwmmc, dwmmc_driver, dwmmc_methods, sizeof(struct dwmmc_softc));