/* $NetBSD: ti_sdhc.c,v 1.3.2.3 2019/12/08 12:54:10 martin Exp $ */ /*- * Copyright (c) 2011 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ #include __KERNEL_RCSID(0, "$NetBSD: ti_sdhc.c,v 1.3.2.3 2019/12/08 12:54:10 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define EDMA_MAX_PARAMS 32 #ifdef TISDHC_DEBUG int tisdhcdebug = 1; #define DPRINTF(n,s) do { if ((n) <= tisdhcdebug) device_printf s; } while (0) #else #define DPRINTF(n,s) do {} while (0) #endif #define CLKD(kz) (sc->sc.sc_clkbase / (kz)) #define SDHC_READ(sc, reg) \ bus_space_read_4((sc)->sc_bst, (sc)->sc_sdhc_bsh, (reg)) #define SDHC_WRITE(sc, reg, val) \ bus_space_write_4((sc)->sc_bst, (sc)->sc_sdhc_bsh, (reg), (val)) struct ti_sdhc_config { bus_size_t regoff; uint32_t flags; }; static const struct ti_sdhc_config omap2_hsmmc_config = { }; static const struct ti_sdhc_config omap3_pre_es3_hsmmc_config = { .flags = SDHC_FLAG_SINGLE_ONLY }; static const struct ti_sdhc_config omap4_hsmmc_config = { .regoff = 0x100 }; static const struct of_compat_data compat_data[] = { { "ti,omap2-hsmmc", (uintptr_t)&omap2_hsmmc_config }, { "ti,omap3-hsmmc", (uintptr_t)&omap2_hsmmc_config }, { "ti,omap3-pre-es3-hsmmc", (uintptr_t)&omap3_pre_es3_hsmmc_config }, { "ti,omap4-hsmmc", (uintptr_t)&omap4_hsmmc_config }, { NULL } }; enum { EDMA_CHAN_TX, EDMA_CHAN_RX, EDMA_NCHAN }; struct ti_sdhc_softc { struct sdhc_softc sc; int sc_phandle; bus_addr_t sc_addr; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; bus_space_handle_t sc_hl_bsh; bus_space_handle_t sc_sdhc_bsh; struct sdhc_host *sc_hosts[1]; void *sc_ih; /* interrupt vectoring */ int sc_edma_chan[EDMA_NCHAN]; struct edma_channel *sc_edma_tx; struct edma_channel *sc_edma_rx; uint16_t sc_edma_param_tx[EDMA_MAX_PARAMS]; uint16_t sc_edma_param_rx[EDMA_MAX_PARAMS]; kcondvar_t sc_edma_cv; bus_addr_t sc_edma_fifo; bool sc_edma_pending; bus_dmamap_t sc_edma_dmamap; bus_dma_segment_t sc_edma_segs[1]; void *sc_edma_bbuf; }; static int ti_sdhc_match(device_t, cfdata_t, void *); static void ti_sdhc_attach(device_t, device_t, void *); static void ti_sdhc_init(struct ti_sdhc_softc *, const struct ti_sdhc_config *); static int ti_sdhc_bus_width(struct sdhc_softc *, int); static int ti_sdhc_rod(struct sdhc_softc *, int); static int ti_sdhc_write_protect(struct sdhc_softc *); static int ti_sdhc_card_detect(struct sdhc_softc *); static int ti_sdhc_edma_init(struct ti_sdhc_softc *, u_int, u_int); static int ti_sdhc_edma_xfer_data(struct sdhc_softc *, struct sdmmc_command *); static void ti_sdhc_edma_done(void *); static int ti_sdhc_edma_transfer(struct sdhc_softc *, struct sdmmc_command *); CFATTACH_DECL_NEW(ti_sdhc, sizeof(struct ti_sdhc_softc), ti_sdhc_match, ti_sdhc_attach, NULL, NULL); static int ti_sdhc_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compat_data(faa->faa_phandle, compat_data); } static void ti_sdhc_attach(device_t parent, device_t self, void *aux) { struct ti_sdhc_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; const int phandle = faa->faa_phandle; const struct ti_sdhc_config *conf; bus_addr_t addr; bus_size_t size; u_int bus_width; conf = (const void *)of_search_compatible(phandle, compat_data)->data; if (ti_prcm_enable_hwmod(phandle, 0) != 0) { aprint_error(": couldn't enable module\n"); return; } if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0 || size <= conf->regoff) { aprint_error(": couldn't get registers\n"); return; } addr += conf->regoff; size -= conf->regoff; sc->sc.sc_dmat = faa->faa_dmat; sc->sc.sc_dev = self; sc->sc_phandle = phandle; sc->sc_addr = addr; sc->sc_bst = faa->faa_bst; /* XXX use fdtbus_dma API */ int len; const u_int *dmas = fdtbus_get_prop(phandle, "dmas", &len); switch (len) { case 24: sc->sc_edma_chan[EDMA_CHAN_TX] = be32toh(dmas[1]); sc->sc_edma_chan[EDMA_CHAN_RX] = be32toh(dmas[4]); break; case 32: sc->sc_edma_chan[EDMA_CHAN_TX] = be32toh(dmas[1]); sc->sc_edma_chan[EDMA_CHAN_RX] = be32toh(dmas[5]); break; default: sc->sc_edma_chan[EDMA_CHAN_TX] = -1; sc->sc_edma_chan[EDMA_CHAN_RX] = -1; break; } if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { aprint_error(": couldn't map registers\n"); return; } if (of_getprop_uint32(phandle, "bus-width", &bus_width) != 0) bus_width = 4; sc->sc.sc_flags |= conf->flags; sc->sc.sc_flags |= SDHC_FLAG_32BIT_ACCESS; sc->sc.sc_flags |= SDHC_FLAG_NO_LED_ON; sc->sc.sc_flags |= SDHC_FLAG_RSP136_CRC; if (bus_width == 8) sc->sc.sc_flags |= SDHC_FLAG_8BIT_MODE; if (of_hasprop(phandle, "ti,needs-special-reset")) sc->sc.sc_flags |= SDHC_FLAG_WAIT_RESET; if (!of_hasprop(phandle, "ti,needs-special-hs-handling")) sc->sc.sc_flags |= SDHC_FLAG_NO_HS_BIT; if (of_hasprop(phandle, "ti,dual-volt")) sc->sc.sc_caps = SDHC_VOLTAGE_SUPP_3_0V; sc->sc.sc_host = sc->sc_hosts; sc->sc.sc_clkbase = 96000; /* 96MHZ */ sc->sc.sc_clkmsk = 0x0000ffc0; sc->sc.sc_vendor_rod = ti_sdhc_rod; sc->sc.sc_vendor_write_protect = ti_sdhc_write_protect; sc->sc.sc_vendor_card_detect = ti_sdhc_card_detect; sc->sc.sc_vendor_bus_width = ti_sdhc_bus_width; if (bus_space_subregion(sc->sc_bst, sc->sc_bsh, 0x100, 0x100, &sc->sc_sdhc_bsh) != 0) { aprint_error(": couldn't map subregion\n"); return; } aprint_naive("\n"); aprint_normal(": MMCHS\n"); ti_sdhc_init(sc, conf); } static void ti_sdhc_init(struct ti_sdhc_softc *sc, const struct ti_sdhc_config *conf) { device_t dev = sc->sc.sc_dev; uint32_t clkd, stat; int error, timo, clksft, n; char intrstr[128]; const int tx_chan = sc->sc_edma_chan[EDMA_CHAN_TX]; const int rx_chan = sc->sc_edma_chan[EDMA_CHAN_RX]; if (tx_chan != -1 && rx_chan != -1) { aprint_normal_dev(dev, "EDMA tx channel %d, rx channel %d\n", tx_chan, rx_chan); if (ti_sdhc_edma_init(sc, tx_chan, rx_chan) != 0) { aprint_error_dev(dev, "EDMA disabled\n"); goto no_dma; } cv_init(&sc->sc_edma_cv, "sdhcedma"); sc->sc_edma_fifo = sc->sc_addr + 0x100 + SDHC_DATA; sc->sc.sc_flags |= SDHC_FLAG_USE_DMA; sc->sc.sc_flags |= SDHC_FLAG_EXTERNAL_DMA; sc->sc.sc_flags |= SDHC_FLAG_EXTDMA_DMAEN; sc->sc.sc_vendor_transfer_data_dma = ti_sdhc_edma_xfer_data; } no_dma: /* XXXXXX: Turn-on regulator via I2C. */ /* XXXXXX: And enable ICLOCK/FCLOCK. */ SDHC_WRITE(sc, SDHC_CAPABILITIES, SDHC_READ(sc, SDHC_CAPABILITIES) | SDHC_VOLTAGE_SUPP_1_8V); if (sc->sc.sc_caps & SDHC_VOLTAGE_SUPP_3_0V) SDHC_WRITE(sc, SDHC_CAPABILITIES, SDHC_READ(sc, SDHC_CAPABILITIES) | SDHC_VOLTAGE_SUPP_3_0V); /* MMCHS Soft reset */ bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSCONFIG, SYSCONFIG_SOFTRESET); timo = 3000000; /* XXXX 3 sec. */ while (timo--) { if (bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSSTATUS) & SYSSTATUS_RESETDONE) break; delay(1); } if (timo == 0) aprint_error_dev(dev, "Soft reset timeout\n"); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_SYSCONFIG, SYSCONFIG_ENAWAKEUP | #if notyet SYSCONFIG_AUTOIDLE | SYSCONFIG_SIDLEMODE_AUTO | #else SYSCONFIG_SIDLEMODE_IGNORE | #endif SYSCONFIG_CLOCKACTIVITY_FCLK | SYSCONFIG_CLOCKACTIVITY_ICLK); if (!fdtbus_intr_str(sc->sc_phandle, 0, intrstr, sizeof(intrstr))) { aprint_error_dev(dev, "couldn't decode interrupt\n"); return; } sc->sc_ih = fdtbus_intr_establish(sc->sc_phandle, 0, IPL_VM, 0, sdhc_intr, &sc->sc); if (sc->sc_ih == NULL) { aprint_error_dev(dev, "couldn't establish interrupt\n"); return; } aprint_normal_dev(dev, "interrupting on %s\n", intrstr); error = sdhc_host_found(&sc->sc, sc->sc_bst, sc->sc_sdhc_bsh, 0x100); if (error != 0) { aprint_error_dev(dev, "couldn't initialize host, error=%d\n", error); fdtbus_intr_disestablish(sc->sc_phandle, sc->sc_ih); return; } clksft = ffs(sc->sc.sc_clkmsk) - 1; /* Set SDVS 1.8v and DTW 1bit mode */ SDHC_WRITE(sc, SDHC_HOST_CTL, SDHC_VOLTAGE_1_8V << (SDHC_VOLTAGE_SHIFT + 8)); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_INTCLK_ENABLE | SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_HOST_CTL, SDHC_READ(sc, SDHC_HOST_CTL) | SDHC_BUS_POWER << 8); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | CLKD(150) << clksft); /* * 22.6.1.3.1.5 MMCHS Controller INIT Procedure Start * from 'OMAP35x Applications Processor Technical Reference Manual'. * * During the INIT procedure, the MMCHS controller generates 80 clock * periods. In order to keep the 1ms gap, the MMCHS controller should * be configured to generate a clock whose frequency is smaller or * equal to 80 KHz. */ SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~sc->sc.sc_clkmsk); clkd = CLKD(80); n = 1; while (clkd & ~(sc->sc.sc_clkmsk >> clksft)) { clkd >>= 1; n <<= 1; } SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | (clkd << clksft)); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_SDCLK_ENABLE); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) | CON_INIT); SDHC_WRITE(sc, SDHC_TRANSFER_MODE, 0x00000000); delay(1000); stat = SDHC_READ(sc, SDHC_NINTR_STATUS); SDHC_WRITE(sc, SDHC_NINTR_STATUS, stat | SDHC_COMMAND_COMPLETE); bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) & ~CON_INIT); SDHC_WRITE(sc, SDHC_NINTR_STATUS, 0xffffffff); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~SDHC_SDCLK_ENABLE); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) & ~sc->sc.sc_clkmsk); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | CLKD(150) << clksft); timo = 3000000; /* XXXX 3 sec. */ while (--timo) { if (SDHC_READ(sc, SDHC_CLOCK_CTL) & SDHC_INTCLK_STABLE) break; delay(1); } if (timo == 0) aprint_error_dev(dev, "ICS timeout\n"); SDHC_WRITE(sc, SDHC_CLOCK_CTL, SDHC_READ(sc, SDHC_CLOCK_CTL) | SDHC_SDCLK_ENABLE); if (sc->sc.sc_flags & SDHC_FLAG_USE_ADMA2) bus_space_write_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON, bus_space_read_4(sc->sc_bst, sc->sc_bsh, MMCHS_CON) | CON_MNS); } static int ti_sdhc_rod(struct sdhc_softc *sc, int on) { struct ti_sdhc_softc *hmsc = (struct ti_sdhc_softc *)sc; uint32_t con; con = bus_space_read_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON); if (on) con |= CON_OD; else con &= ~CON_OD; bus_space_write_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON, con); return 0; } static int ti_sdhc_write_protect(struct sdhc_softc *sc) { /* Maybe board dependent, using GPIO. Get GPIO-pin from prop? */ return 0; /* XXXXXXX */ } static int ti_sdhc_card_detect(struct sdhc_softc *sc) { /* Maybe board dependent, using GPIO. Get GPIO-pin from prop? */ return 1; /* XXXXXXXX */ } static int ti_sdhc_bus_width(struct sdhc_softc *sc, int width) { struct ti_sdhc_softc *hmsc = (struct ti_sdhc_softc *)sc; uint32_t con, hctl; con = bus_space_read_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON); hctl = SDHC_READ(hmsc, SDHC_HOST_CTL); if (width == 8) { con |= CON_DW8; } else if (width == 4) { con &= ~CON_DW8; hctl |= SDHC_4BIT_MODE; } else { con &= ~CON_DW8; hctl &= ~SDHC_4BIT_MODE; } bus_space_write_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON, con); SDHC_WRITE(hmsc, SDHC_HOST_CTL, hctl); return 0; } static int ti_sdhc_edma_init(struct ti_sdhc_softc *sc, u_int tx_chan, u_int rx_chan) { int i, error, rseg; /* Request tx and rx DMA channels */ sc->sc_edma_tx = edma_channel_alloc(EDMA_TYPE_DMA, tx_chan, ti_sdhc_edma_done, sc); KASSERT(sc->sc_edma_tx != NULL); sc->sc_edma_rx = edma_channel_alloc(EDMA_TYPE_DMA, rx_chan, ti_sdhc_edma_done, sc); KASSERT(sc->sc_edma_rx != NULL); /* Allocate some PaRAM pages */ for (i = 0; i < __arraycount(sc->sc_edma_param_tx); i++) { sc->sc_edma_param_tx[i] = edma_param_alloc(sc->sc_edma_tx); KASSERT(sc->sc_edma_param_tx[i] != 0xffff); } for (i = 0; i < __arraycount(sc->sc_edma_param_rx); i++) { sc->sc_edma_param_rx[i] = edma_param_alloc(sc->sc_edma_rx); KASSERT(sc->sc_edma_param_rx[i] != 0xffff); } /* Setup bounce buffer */ error = bus_dmamem_alloc(sc->sc.sc_dmat, MAXPHYS, 32, MAXPHYS, sc->sc_edma_segs, 1, &rseg, BUS_DMA_WAITOK); if (error) { aprint_error_dev(sc->sc.sc_dev, "couldn't allocate dmamem: %d\n", error); return error; } KASSERT(rseg == 1); error = bus_dmamem_map(sc->sc.sc_dmat, sc->sc_edma_segs, rseg, MAXPHYS, &sc->sc_edma_bbuf, BUS_DMA_WAITOK); if (error) { aprint_error_dev(sc->sc.sc_dev, "couldn't map dmamem: %d\n", error); return error; } error = bus_dmamap_create(sc->sc.sc_dmat, MAXPHYS, 1, MAXPHYS, 0, BUS_DMA_WAITOK, &sc->sc_edma_dmamap); if (error) { aprint_error_dev(sc->sc.sc_dev, "couldn't create dmamap: %d\n", error); return error; } error = bus_dmamap_load(sc->sc.sc_dmat, sc->sc_edma_dmamap, sc->sc_edma_bbuf, MAXPHYS, NULL, BUS_DMA_WAITOK); if (error) { device_printf(sc->sc.sc_dev, "couldn't load dmamap: %d\n", error); return error; } return error; } static int ti_sdhc_edma_xfer_data(struct sdhc_softc *sdhc_sc, struct sdmmc_command *cmd) { struct ti_sdhc_softc *sc = device_private(sdhc_sc->sc_dev); const bus_dmamap_t map = cmd->c_dmamap; bool bounce; int error; #if notyet bounce = false; for (int seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) { if ((cmd->c_dmamap->dm_segs[seg].ds_addr & 0x1f) != 0 || (cmd->c_dmamap->dm_segs[seg].ds_len & 3) != 0) { bounce = true; break; } } #else bounce = true; #endif if (bounce) { if (ISSET(cmd->c_flags, SCF_CMD_READ)) { bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0, MAXPHYS, BUS_DMASYNC_PREREAD); } else { memcpy(sc->sc_edma_bbuf, cmd->c_data, cmd->c_datalen); bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0, MAXPHYS, BUS_DMASYNC_PREWRITE); } cmd->c_dmamap = sc->sc_edma_dmamap; } error = ti_sdhc_edma_transfer(sdhc_sc, cmd); if (bounce) { if (ISSET(cmd->c_flags, SCF_CMD_READ)) { bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0, MAXPHYS, BUS_DMASYNC_POSTREAD); } else { bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0, MAXPHYS, BUS_DMASYNC_POSTWRITE); } if (ISSET(cmd->c_flags, SCF_CMD_READ) && error == 0) { memcpy(cmd->c_data, sc->sc_edma_bbuf, cmd->c_datalen); } cmd->c_dmamap = map; } return error; } static int ti_sdhc_edma_transfer(struct sdhc_softc *sdhc_sc, struct sdmmc_command *cmd) { struct ti_sdhc_softc *sc = device_private(sdhc_sc->sc_dev); kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]); struct edma_channel *edma; uint16_t *edma_param; struct edma_param ep; size_t seg; int error, resid = cmd->c_datalen; int blksize = MIN(cmd->c_datalen, cmd->c_blklen); KASSERT(mutex_owned(plock)); edma = ISSET(cmd->c_flags, SCF_CMD_READ) ? sc->sc_edma_rx : sc->sc_edma_tx; edma_param = ISSET(cmd->c_flags, SCF_CMD_READ) ? sc->sc_edma_param_rx : sc->sc_edma_param_tx; DPRINTF(1, (sc->sc.sc_dev, "edma xfer: nsegs=%d ch# %d\n", cmd->c_dmamap->dm_nsegs, edma_channel_index(edma))); if (cmd->c_dmamap->dm_nsegs > EDMA_MAX_PARAMS) { return ENOMEM; } for (seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) { KASSERT(resid > 0); const int xferlen = uimin(resid, cmd->c_dmamap->dm_segs[seg].ds_len); KASSERT(xferlen == cmd->c_dmamap->dm_segs[seg].ds_len || seg == cmd->c_dmamap->dm_nsegs - 1); resid -= xferlen; KASSERT((xferlen & 0x3) == 0); ep.ep_opt = __SHIFTIN(2, EDMA_PARAM_OPT_FWID) /* 32-bit */; ep.ep_opt |= __SHIFTIN(edma_channel_index(edma), EDMA_PARAM_OPT_TCC); if (seg == cmd->c_dmamap->dm_nsegs - 1) { ep.ep_opt |= EDMA_PARAM_OPT_TCINTEN; ep.ep_link = 0xffff; } else { ep.ep_link = EDMA_PARAM_BASE(edma_param[seg+1]); } if (ISSET(cmd->c_flags, SCF_CMD_READ)) { ep.ep_opt |= EDMA_PARAM_OPT_SAM; ep.ep_src = sc->sc_edma_fifo; ep.ep_dst = cmd->c_dmamap->dm_segs[seg].ds_addr; } else { ep.ep_opt |= EDMA_PARAM_OPT_DAM; ep.ep_src = cmd->c_dmamap->dm_segs[seg].ds_addr; ep.ep_dst = sc->sc_edma_fifo; } KASSERT(xferlen <= 65536 * 4); /* * In constant addressing mode, the address must be aligned * to 256-bits. */ KASSERT((cmd->c_dmamap->dm_segs[seg].ds_addr & 0x1f) == 0); /* * For unknown reason, the A-DMA transfers never completes for * transfers larger than 64 butes. So use a AB transfer, * with a 64 bytes A len */ ep.ep_bcntrld = 0; /* not used for AB-synchronous mode */ ep.ep_opt |= EDMA_PARAM_OPT_SYNCDIM; ep.ep_acnt = uimin(xferlen, 64); ep.ep_bcnt = uimin(xferlen, blksize) / ep.ep_acnt; ep.ep_ccnt = xferlen / (ep.ep_acnt * ep.ep_bcnt); ep.ep_srcbidx = ep.ep_dstbidx = 0; ep.ep_srccidx = ep.ep_dstcidx = 0; if (ISSET(cmd->c_flags, SCF_CMD_READ)) { ep.ep_dstbidx = ep.ep_acnt; ep.ep_dstcidx = ep.ep_acnt * ep.ep_bcnt; } else { ep.ep_srcbidx = ep.ep_acnt; ep.ep_srccidx = ep.ep_acnt * ep.ep_bcnt; } edma_set_param(edma, edma_param[seg], &ep); #ifdef TISDHC_DEBUG if (tisdhcdebug >= 1) { printf("target OPT: %08x\n", ep.ep_opt); edma_dump_param(edma, edma_param[seg]); } #endif } error = 0; sc->sc_edma_pending = true; edma_transfer_enable(edma, edma_param[0]); while (sc->sc_edma_pending) { error = cv_timedwait(&sc->sc_edma_cv, plock, hz*10); if (error == EWOULDBLOCK) { device_printf(sc->sc.sc_dev, "transfer timeout!\n"); edma_dump(edma); edma_dump_param(edma, edma_param[0]); edma_halt(edma); sc->sc_edma_pending = false; error = ETIMEDOUT; break; } } edma_halt(edma); return error; } static void ti_sdhc_edma_done(void *priv) { struct ti_sdhc_softc *sc = priv; kmutex_t *plock = sdhc_host_lock(sc->sc_hosts[0]); mutex_enter(plock); KASSERT(sc->sc_edma_pending == true); sc->sc_edma_pending = false; cv_broadcast(&sc->sc_edma_cv); mutex_exit(plock); }