Author: manu Date: Tue Dec 26 12:06:56 2017 New Revision: 327198 URL: https://svnweb.freebsd.org/changeset/base/327198
Log: Allwinner: mmc: Rename driver to aw_mmc and add a man page for it Reviewed by: bcr (manpages) Differential Revision: https://reviews.freebsd.org/D13616 Added: head/share/man/man4/aw_mmc.4 (contents, props changed) head/sys/arm/allwinner/aw_mmc.c (contents, props changed) head/sys/arm/allwinner/aw_mmc.h (contents, props changed) Deleted: head/sys/arm/allwinner/a10_mmc.c head/sys/arm/allwinner/a10_mmc.h Modified: head/share/man/man4/Makefile head/sys/arm/allwinner/files.allwinner Modified: head/share/man/man4/Makefile ============================================================================== --- head/share/man/man4/Makefile Tue Dec 26 10:59:54 2017 (r327197) +++ head/share/man/man4/Makefile Tue Dec 26 12:06:56 2017 (r327198) @@ -70,6 +70,7 @@ MAN= aac.4 \ audit.4 \ auditpipe.4 \ aue.4 \ + aw_mmc.4 \ aw_rtc.4 \ axe.4 \ axge.4 \ Added: head/share/man/man4/aw_mmc.4 ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/share/man/man4/aw_mmc.4 Tue Dec 26 12:06:56 2017 (r327198) @@ -0,0 +1,76 @@ +.\"- +.\" Copyright (c) 2017 Emmanuel Vadot <m...@freebsd.org> +.\" All rights reserved. +.\" +.\" 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. +.\" +.\" $FreeBSD$ +.\" +.Dd Dec 25, 2017 +.Dt AW_MMC 4 +.Os +.Sh NAME +.Nm aw_mmc +.Nd driver for the SD/MMC controller in Allwinner SoC +.Sh SYNOPSIS +.Cd "device mmc" +.Sh DESCRIPTION +The +.Nm +device driver provides support for the Allwinner SD/MMC host controller. +.Sh HARDWARE +The current version of the +.Nm +driver supports the SD/MMC controller with one of the following compatible strings : +.Pp +.Bl -bullet -compact +.It +allwinner,sun4i-a10-mmc +.It +allwinner,sun5i-a13-mmc +.It +allwinner,sun7i-a20-mmc +.It +allwinner,sun50i-a64-mmc +.El +.Sh SYSCTL VARIABLES +The following read-only variables are available via +.Xr sysctl 8 : +.Bl -tag -width indent +.It Va dev.aw_mmc.req_timeout +Request timeout in seconds (default: 10) . +.El +.Sh SEE ALSO +.Xr fdt 4 , +.Xr mmc 4 +.Sh HISTORY +The +.Nm +device driver first appeared in +.Fx 10.0 . +.Sh AUTHORS +The +.Nm +device driver was originally written by +.An Alexander Fedorov Aq Mt alexander.fedo...@rtlservice.com . +Later work and this manual page was done by +.An Emmanuel Vadot Aq Mt m...@freebsd.org . Added: head/sys/arm/allwinner/aw_mmc.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/arm/allwinner/aw_mmc.c Tue Dec 26 12:06:56 2017 (r327198) @@ -0,0 +1,922 @@ +/*- + * Copyright (c) 2013 Alexander Fedorov + * All rights reserved. + * + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/resource.h> +#include <sys/rman.h> +#include <sys/sysctl.h> + +#include <machine/bus.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <dev/mmc/bridge.h> +#include <dev/mmc/mmcbrvar.h> + +#include <arm/allwinner/aw_mmc.h> +#include <dev/extres/clk/clk.h> +#include <dev/extres/hwreset/hwreset.h> + +#define AW_MMC_MEMRES 0 +#define AW_MMC_IRQRES 1 +#define AW_MMC_RESSZ 2 +#define AW_MMC_DMA_SEGS ((MAXPHYS / PAGE_SIZE) + 1) +#define AW_MMC_DMA_MAX_SIZE 0x2000 +#define AW_MMC_DMA_FTRGLEVEL 0x20070008 +#define AW_MMC_RESET_RETRY 1000 + +#define CARD_ID_FREQUENCY 400000 + +static struct ofw_compat_data compat_data[] = { + {"allwinner,sun4i-a10-mmc", 1}, + {"allwinner,sun5i-a13-mmc", 1}, + {"allwinner,sun7i-a20-mmc", 1}, + {"allwinner,sun50i-a64-mmc", 1}, + {NULL, 0} +}; + +struct aw_mmc_softc { + device_t aw_dev; + clk_t aw_clk_ahb; + clk_t aw_clk_mmc; + hwreset_t aw_rst_ahb; + int aw_bus_busy; + int aw_resid; + int aw_timeout; + struct callout aw_timeoutc; + struct mmc_host aw_host; + struct mmc_request * aw_req; + struct mtx aw_mtx; + struct resource * aw_res[AW_MMC_RESSZ]; + uint32_t aw_intr; + uint32_t aw_intr_wait; + void * aw_intrhand; + + /* Fields required for DMA access. */ + bus_addr_t aw_dma_desc_phys; + bus_dmamap_t aw_dma_map; + bus_dma_tag_t aw_dma_tag; + void * aw_dma_desc; + bus_dmamap_t aw_dma_buf_map; + bus_dma_tag_t aw_dma_buf_tag; + int aw_dma_map_err; +}; + +static struct resource_spec aw_mmc_res_spec[] = { + { SYS_RES_MEMORY, 0, RF_ACTIVE }, + { SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE }, + { -1, 0, 0 } +}; + +static int aw_mmc_probe(device_t); +static int aw_mmc_attach(device_t); +static int aw_mmc_detach(device_t); +static int aw_mmc_setup_dma(struct aw_mmc_softc *); +static int aw_mmc_reset(struct aw_mmc_softc *); +static void aw_mmc_intr(void *); +static int aw_mmc_update_clock(struct aw_mmc_softc *, uint32_t); + +static int aw_mmc_update_ios(device_t, device_t); +static int aw_mmc_request(device_t, device_t, struct mmc_request *); +static int aw_mmc_get_ro(device_t, device_t); +static int aw_mmc_acquire_host(device_t, device_t); +static int aw_mmc_release_host(device_t, device_t); + +#define AW_MMC_LOCK(_sc) mtx_lock(&(_sc)->aw_mtx) +#define AW_MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->aw_mtx) +#define AW_MMC_READ_4(_sc, _reg) \ + bus_read_4((_sc)->aw_res[AW_MMC_MEMRES], _reg) +#define AW_MMC_WRITE_4(_sc, _reg, _value) \ + bus_write_4((_sc)->aw_res[AW_MMC_MEMRES], _reg, _value) + +static int +aw_mmc_probe(device_t dev) +{ + + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "Allwinner Integrated MMC/SD controller"); + + return (BUS_PROBE_DEFAULT); +} + +static int +aw_mmc_attach(device_t dev) +{ + device_t child; + struct aw_mmc_softc *sc; + struct sysctl_ctx_list *ctx; + struct sysctl_oid_list *tree; + uint32_t bus_width; + phandle_t node; + int error; + + node = ofw_bus_get_node(dev); + sc = device_get_softc(dev); + sc->aw_dev = dev; + sc->aw_req = NULL; + if (bus_alloc_resources(dev, aw_mmc_res_spec, sc->aw_res) != 0) { + device_printf(dev, "cannot allocate device resources\n"); + return (ENXIO); + } + if (bus_setup_intr(dev, sc->aw_res[AW_MMC_IRQRES], + INTR_TYPE_MISC | INTR_MPSAFE, NULL, aw_mmc_intr, sc, + &sc->aw_intrhand)) { + bus_release_resources(dev, aw_mmc_res_spec, sc->aw_res); + device_printf(dev, "cannot setup interrupt handler\n"); + return (ENXIO); + } + mtx_init(&sc->aw_mtx, device_get_nameunit(sc->aw_dev), "aw_mmc", + MTX_DEF); + callout_init_mtx(&sc->aw_timeoutc, &sc->aw_mtx, 0); + + /* De-assert reset */ + if (hwreset_get_by_ofw_name(dev, 0, "ahb", &sc->aw_rst_ahb) == 0) { + error = hwreset_deassert(sc->aw_rst_ahb); + if (error != 0) { + device_printf(dev, "cannot de-assert reset\n"); + goto fail; + } + } + + /* Activate the module clock. */ + error = clk_get_by_ofw_name(dev, 0, "ahb", &sc->aw_clk_ahb); + if (error != 0) { + device_printf(dev, "cannot get ahb clock\n"); + goto fail; + } + error = clk_enable(sc->aw_clk_ahb); + if (error != 0) { + device_printf(dev, "cannot enable ahb clock\n"); + goto fail; + } + error = clk_get_by_ofw_name(dev, 0, "mmc", &sc->aw_clk_mmc); + if (error != 0) { + device_printf(dev, "cannot get mmc clock\n"); + goto fail; + } + error = clk_set_freq(sc->aw_clk_mmc, CARD_ID_FREQUENCY, + CLK_SET_ROUND_DOWN); + if (error != 0) { + device_printf(dev, "cannot init mmc clock\n"); + goto fail; + } + error = clk_enable(sc->aw_clk_mmc); + if (error != 0) { + device_printf(dev, "cannot enable mmc clock\n"); + goto fail; + } + + sc->aw_timeout = 10; + ctx = device_get_sysctl_ctx(dev); + tree = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); + SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "req_timeout", CTLFLAG_RW, + &sc->aw_timeout, 0, "Request timeout in seconds"); + + /* Hardware reset */ + AW_MMC_WRITE_4(sc, AW_MMC_HWRST, 1); + DELAY(100); + AW_MMC_WRITE_4(sc, AW_MMC_HWRST, 0); + DELAY(500); + + /* Soft Reset controller. */ + if (aw_mmc_reset(sc) != 0) { + device_printf(dev, "cannot reset the controller\n"); + goto fail; + } + + if (aw_mmc_setup_dma(sc) != 0) { + device_printf(sc->aw_dev, "Couldn't setup DMA!\n"); + goto fail; + } + + if (OF_getencprop(node, "bus-width", &bus_width, sizeof(uint32_t)) <= 0) + bus_width = 4; + + sc->aw_host.f_min = 400000; + sc->aw_host.f_max = 52000000; + sc->aw_host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340; + sc->aw_host.mode = mode_sd; + sc->aw_host.caps = MMC_CAP_HSPEED; + if (bus_width >= 4) + sc->aw_host.caps |= MMC_CAP_4_BIT_DATA; + if (bus_width >= 8) + sc->aw_host.caps |= MMC_CAP_8_BIT_DATA; + + child = device_add_child(dev, "mmc", -1); + if (child == NULL) { + device_printf(dev, "attaching MMC bus failed!\n"); + goto fail; + } + if (device_probe_and_attach(child) != 0) { + device_printf(dev, "attaching MMC child failed!\n"); + device_delete_child(dev, child); + goto fail; + } + + return (0); + +fail: + callout_drain(&sc->aw_timeoutc); + mtx_destroy(&sc->aw_mtx); + bus_teardown_intr(dev, sc->aw_res[AW_MMC_IRQRES], sc->aw_intrhand); + bus_release_resources(dev, aw_mmc_res_spec, sc->aw_res); + + return (ENXIO); +} + +static int +aw_mmc_detach(device_t dev) +{ + + return (EBUSY); +} + +static void +aw_dma_desc_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err) +{ + struct aw_mmc_softc *sc; + + sc = (struct aw_mmc_softc *)arg; + if (err) { + sc->aw_dma_map_err = err; + return; + } + sc->aw_dma_desc_phys = segs[0].ds_addr; +} + +static int +aw_mmc_setup_dma(struct aw_mmc_softc *sc) +{ + int dma_desc_size, error; + + /* Allocate the DMA descriptor memory. */ + dma_desc_size = sizeof(struct aw_mmc_dma_desc) * AW_MMC_DMA_SEGS; + error = bus_dma_tag_create(bus_get_dma_tag(sc->aw_dev), + AW_MMC_DMA_ALIGN, 0, + BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, + dma_desc_size, 1, dma_desc_size, 0, NULL, NULL, &sc->aw_dma_tag); + if (error) + return (error); + error = bus_dmamem_alloc(sc->aw_dma_tag, &sc->aw_dma_desc, + BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->aw_dma_map); + if (error) + return (error); + + error = bus_dmamap_load(sc->aw_dma_tag, sc->aw_dma_map, + sc->aw_dma_desc, dma_desc_size, aw_dma_desc_cb, sc, 0); + if (error) + return (error); + if (sc->aw_dma_map_err) + return (sc->aw_dma_map_err); + + /* Create the DMA map for data transfers. */ + error = bus_dma_tag_create(bus_get_dma_tag(sc->aw_dev), + AW_MMC_DMA_ALIGN, 0, + BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, + AW_MMC_DMA_MAX_SIZE * AW_MMC_DMA_SEGS, AW_MMC_DMA_SEGS, + AW_MMC_DMA_MAX_SIZE, BUS_DMA_ALLOCNOW, NULL, NULL, + &sc->aw_dma_buf_tag); + if (error) + return (error); + error = bus_dmamap_create(sc->aw_dma_buf_tag, 0, + &sc->aw_dma_buf_map); + if (error) + return (error); + + return (0); +} + +static void +aw_dma_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err) +{ + int i; + struct aw_mmc_dma_desc *dma_desc; + struct aw_mmc_softc *sc; + + sc = (struct aw_mmc_softc *)arg; + sc->aw_dma_map_err = err; + + if (err) + return; + + dma_desc = sc->aw_dma_desc; + for (i = 0; i < nsegs; i++) { + dma_desc[i].buf_size = segs[i].ds_len; + dma_desc[i].buf_addr = segs[i].ds_addr; + dma_desc[i].config = AW_MMC_DMA_CONFIG_CH | + AW_MMC_DMA_CONFIG_OWN; + if (i == 0) + dma_desc[i].config |= AW_MMC_DMA_CONFIG_FD; + if (i < (nsegs - 1)) { + dma_desc[i].config |= AW_MMC_DMA_CONFIG_DIC; + dma_desc[i].next = sc->aw_dma_desc_phys + + ((i + 1) * sizeof(struct aw_mmc_dma_desc)); + } else { + dma_desc[i].config |= AW_MMC_DMA_CONFIG_LD | + AW_MMC_DMA_CONFIG_ER; + dma_desc[i].next = 0; + } + } +} + +static int +aw_mmc_prepare_dma(struct aw_mmc_softc *sc) +{ + bus_dmasync_op_t sync_op; + int error; + struct mmc_command *cmd; + uint32_t val; + + cmd = sc->aw_req->cmd; + if (cmd->data->len > AW_MMC_DMA_MAX_SIZE * AW_MMC_DMA_SEGS) + return (EFBIG); + error = bus_dmamap_load(sc->aw_dma_buf_tag, sc->aw_dma_buf_map, + cmd->data->data, cmd->data->len, aw_dma_cb, sc, 0); + if (error) + return (error); + if (sc->aw_dma_map_err) + return (sc->aw_dma_map_err); + + if (cmd->data->flags & MMC_DATA_WRITE) + sync_op = BUS_DMASYNC_PREWRITE; + else + sync_op = BUS_DMASYNC_PREREAD; + bus_dmamap_sync(sc->aw_dma_buf_tag, sc->aw_dma_buf_map, sync_op); + bus_dmamap_sync(sc->aw_dma_tag, sc->aw_dma_map, BUS_DMASYNC_PREWRITE); + + /* Enable DMA */ + val = AW_MMC_READ_4(sc, AW_MMC_GCTL); + val &= ~AW_MMC_CTRL_FIFO_AC_MOD; + val |= AW_MMC_CTRL_DMA_ENB; + AW_MMC_WRITE_4(sc, AW_MMC_GCTL, val); + + /* Reset DMA */ + val |= AW_MMC_CTRL_DMA_RST; + AW_MMC_WRITE_4(sc, AW_MMC_GCTL, val); + + AW_MMC_WRITE_4(sc, AW_MMC_DMAC, AW_MMC_DMAC_IDMAC_SOFT_RST); + AW_MMC_WRITE_4(sc, AW_MMC_DMAC, + AW_MMC_DMAC_IDMAC_IDMA_ON | AW_MMC_DMAC_IDMAC_FIX_BURST); + + /* Enable RX or TX DMA interrupt */ + if (cmd->data->flags & MMC_DATA_WRITE) + val |= AW_MMC_IDST_TX_INT; + else + val |= AW_MMC_IDST_RX_INT; + AW_MMC_WRITE_4(sc, AW_MMC_IDIE, val); + + /* Set DMA descritptor list address */ + AW_MMC_WRITE_4(sc, AW_MMC_DLBA, sc->aw_dma_desc_phys); + + /* FIFO trigger level */ + AW_MMC_WRITE_4(sc, AW_MMC_FWLR, AW_MMC_DMA_FTRGLEVEL); + + return (0); +} + +static int +aw_mmc_reset(struct aw_mmc_softc *sc) +{ + int timeout; + + AW_MMC_WRITE_4(sc, AW_MMC_GCTL, AW_MMC_RESET); + timeout = 1000; + while (--timeout > 0) { + if ((AW_MMC_READ_4(sc, AW_MMC_GCTL) & AW_MMC_RESET) == 0) + break; + DELAY(100); + } + if (timeout == 0) + return (ETIMEDOUT); + + /* Set the timeout. */ + AW_MMC_WRITE_4(sc, AW_MMC_TMOR, + AW_MMC_TMOR_DTO_LMT_SHIFT(AW_MMC_TMOR_DTO_LMT_MASK) | + AW_MMC_TMOR_RTO_LMT_SHIFT(AW_MMC_TMOR_RTO_LMT_MASK)); + + /* Clear pending interrupts. */ + AW_MMC_WRITE_4(sc, AW_MMC_RISR, 0xffffffff); + AW_MMC_WRITE_4(sc, AW_MMC_IDST, 0xffffffff); + /* Unmask interrupts. */ + AW_MMC_WRITE_4(sc, AW_MMC_IMKR, + AW_MMC_INT_CMD_DONE | AW_MMC_INT_ERR_BIT | + AW_MMC_INT_DATA_OVER | AW_MMC_INT_AUTO_STOP_DONE); + /* Enable interrupts and AHB access. */ + AW_MMC_WRITE_4(sc, AW_MMC_GCTL, + AW_MMC_READ_4(sc, AW_MMC_GCTL) | AW_MMC_CTRL_INT_ENB); + + return (0); +} + +static void +aw_mmc_req_done(struct aw_mmc_softc *sc) +{ + struct mmc_command *cmd; + struct mmc_request *req; + uint32_t val, mask; + int retry; + + cmd = sc->aw_req->cmd; + if (cmd->error != MMC_ERR_NONE) { + /* Reset the FIFO and DMA engines. */ + mask = AW_MMC_CTRL_FIFO_RST | AW_MMC_CTRL_DMA_RST; + val = AW_MMC_READ_4(sc, AW_MMC_GCTL); + AW_MMC_WRITE_4(sc, AW_MMC_GCTL, val | mask); + + retry = AW_MMC_RESET_RETRY; + while (--retry > 0) { + val = AW_MMC_READ_4(sc, AW_MMC_GCTL); + if ((val & mask) == 0) + break; + DELAY(10); + } + if (retry == 0) + device_printf(sc->aw_dev, + "timeout resetting DMA/FIFO\n"); + aw_mmc_update_clock(sc, 1); + } + + req = sc->aw_req; + callout_stop(&sc->aw_timeoutc); + sc->aw_req = NULL; + sc->aw_intr = 0; + sc->aw_resid = 0; + sc->aw_dma_map_err = 0; + sc->aw_intr_wait = 0; + req->done(req); +} + +static void +aw_mmc_req_ok(struct aw_mmc_softc *sc) +{ + int timeout; + struct mmc_command *cmd; + uint32_t status; + + timeout = 1000; + while (--timeout > 0) { + status = AW_MMC_READ_4(sc, AW_MMC_STAR); + if ((status & AW_MMC_STAR_CARD_BUSY) == 0) + break; + DELAY(1000); + } + cmd = sc->aw_req->cmd; + if (timeout == 0) { + cmd->error = MMC_ERR_FAILED; + aw_mmc_req_done(sc); + return; + } + if (cmd->flags & MMC_RSP_PRESENT) { + if (cmd->flags & MMC_RSP_136) { + cmd->resp[0] = AW_MMC_READ_4(sc, AW_MMC_RESP3); + cmd->resp[1] = AW_MMC_READ_4(sc, AW_MMC_RESP2); + cmd->resp[2] = AW_MMC_READ_4(sc, AW_MMC_RESP1); + cmd->resp[3] = AW_MMC_READ_4(sc, AW_MMC_RESP0); + } else + cmd->resp[0] = AW_MMC_READ_4(sc, AW_MMC_RESP0); + } + /* All data has been transferred ? */ + if (cmd->data != NULL && (sc->aw_resid << 2) < cmd->data->len) + cmd->error = MMC_ERR_FAILED; + aw_mmc_req_done(sc); +} + +static void +aw_mmc_timeout(void *arg) +{ + struct aw_mmc_softc *sc; + + sc = (struct aw_mmc_softc *)arg; + if (sc->aw_req != NULL) { + device_printf(sc->aw_dev, "controller timeout\n"); + sc->aw_req->cmd->error = MMC_ERR_TIMEOUT; + aw_mmc_req_done(sc); + } else + device_printf(sc->aw_dev, + "Spurious timeout - no active request\n"); +} + +static void +aw_mmc_intr(void *arg) +{ + bus_dmasync_op_t sync_op; + struct aw_mmc_softc *sc; + struct mmc_data *data; + uint32_t idst, imask, rint; + + sc = (struct aw_mmc_softc *)arg; + AW_MMC_LOCK(sc); + rint = AW_MMC_READ_4(sc, AW_MMC_RISR); + idst = AW_MMC_READ_4(sc, AW_MMC_IDST); + imask = AW_MMC_READ_4(sc, AW_MMC_IMKR); + if (idst == 0 && imask == 0 && rint == 0) { + AW_MMC_UNLOCK(sc); + return; + } +#ifdef DEBUG + device_printf(sc->aw_dev, "idst: %#x, imask: %#x, rint: %#x\n", + idst, imask, rint); +#endif + if (sc->aw_req == NULL) { + device_printf(sc->aw_dev, + "Spurious interrupt - no active request, rint: 0x%08X\n", + rint); + goto end; + } + if (rint & AW_MMC_INT_ERR_BIT) { + device_printf(sc->aw_dev, "error rint: 0x%08X\n", rint); + if (rint & AW_MMC_INT_RESP_TIMEOUT) + sc->aw_req->cmd->error = MMC_ERR_TIMEOUT; + else + sc->aw_req->cmd->error = MMC_ERR_FAILED; + aw_mmc_req_done(sc); + goto end; + } + if (idst & AW_MMC_IDST_ERROR) { + device_printf(sc->aw_dev, "error idst: 0x%08x\n", idst); + sc->aw_req->cmd->error = MMC_ERR_FAILED; + aw_mmc_req_done(sc); + goto end; + } + + sc->aw_intr |= rint; + data = sc->aw_req->cmd->data; + if (data != NULL && (idst & AW_MMC_IDST_COMPLETE) != 0) { + if (data->flags & MMC_DATA_WRITE) + sync_op = BUS_DMASYNC_POSTWRITE; + else + sync_op = BUS_DMASYNC_POSTREAD; + bus_dmamap_sync(sc->aw_dma_buf_tag, sc->aw_dma_buf_map, + sync_op); + bus_dmamap_sync(sc->aw_dma_tag, sc->aw_dma_map, + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(sc->aw_dma_buf_tag, sc->aw_dma_buf_map); + sc->aw_resid = data->len >> 2; + } + if ((sc->aw_intr & sc->aw_intr_wait) == sc->aw_intr_wait) + aw_mmc_req_ok(sc); + +end: + AW_MMC_WRITE_4(sc, AW_MMC_IDST, idst); + AW_MMC_WRITE_4(sc, AW_MMC_RISR, rint); + AW_MMC_UNLOCK(sc); +} + +static int +aw_mmc_request(device_t bus, device_t child, struct mmc_request *req) +{ + int blksz; + struct aw_mmc_softc *sc; + struct mmc_command *cmd; + uint32_t cmdreg; + int err; + + sc = device_get_softc(bus); + AW_MMC_LOCK(sc); + if (sc->aw_req) { + AW_MMC_UNLOCK(sc); + return (EBUSY); + } + sc->aw_req = req; + cmd = req->cmd; + cmdreg = AW_MMC_CMDR_LOAD; + if (cmd->opcode == MMC_GO_IDLE_STATE) + cmdreg |= AW_MMC_CMDR_SEND_INIT_SEQ; + if (cmd->flags & MMC_RSP_PRESENT) + cmdreg |= AW_MMC_CMDR_RESP_RCV; + if (cmd->flags & MMC_RSP_136) + cmdreg |= AW_MMC_CMDR_LONG_RESP; + if (cmd->flags & MMC_RSP_CRC) + cmdreg |= AW_MMC_CMDR_CHK_RESP_CRC; + + sc->aw_intr = 0; + sc->aw_resid = 0; + sc->aw_intr_wait = AW_MMC_INT_CMD_DONE; + cmd->error = MMC_ERR_NONE; + if (cmd->data != NULL) { + sc->aw_intr_wait |= AW_MMC_INT_DATA_OVER; + cmdreg |= AW_MMC_CMDR_DATA_TRANS | AW_MMC_CMDR_WAIT_PRE_OVER; + if (cmd->data->flags & MMC_DATA_MULTI) { + cmdreg |= AW_MMC_CMDR_STOP_CMD_FLAG; + sc->aw_intr_wait |= AW_MMC_INT_AUTO_STOP_DONE; + } + if (cmd->data->flags & MMC_DATA_WRITE) + cmdreg |= AW_MMC_CMDR_DIR_WRITE; + blksz = min(cmd->data->len, MMC_SECTOR_SIZE); + AW_MMC_WRITE_4(sc, AW_MMC_BKSR, blksz); + AW_MMC_WRITE_4(sc, AW_MMC_BYCR, cmd->data->len); + + err = aw_mmc_prepare_dma(sc); + if (err != 0) + device_printf(sc->aw_dev, "prepare_dma failed: %d\n", err); + } + + AW_MMC_WRITE_4(sc, AW_MMC_CAGR, cmd->arg); + AW_MMC_WRITE_4(sc, AW_MMC_CMDR, cmdreg | cmd->opcode); + callout_reset(&sc->aw_timeoutc, sc->aw_timeout * hz, + aw_mmc_timeout, sc); + AW_MMC_UNLOCK(sc); + + return (0); +} + +static int +aw_mmc_read_ivar(device_t bus, device_t child, int which, + uintptr_t *result) +{ + struct aw_mmc_softc *sc; + + sc = device_get_softc(bus); + switch (which) { + default: + return (EINVAL); + case MMCBR_IVAR_BUS_MODE: + *(int *)result = sc->aw_host.ios.bus_mode; + break; + case MMCBR_IVAR_BUS_WIDTH: + *(int *)result = sc->aw_host.ios.bus_width; + break; + case MMCBR_IVAR_CHIP_SELECT: + *(int *)result = sc->aw_host.ios.chip_select; + break; + case MMCBR_IVAR_CLOCK: + *(int *)result = sc->aw_host.ios.clock; + break; + case MMCBR_IVAR_F_MIN: + *(int *)result = sc->aw_host.f_min; + break; + case MMCBR_IVAR_F_MAX: + *(int *)result = sc->aw_host.f_max; + break; + case MMCBR_IVAR_HOST_OCR: + *(int *)result = sc->aw_host.host_ocr; + break; + case MMCBR_IVAR_MODE: + *(int *)result = sc->aw_host.mode; + break; + case MMCBR_IVAR_OCR: + *(int *)result = sc->aw_host.ocr; + break; + case MMCBR_IVAR_POWER_MODE: + *(int *)result = sc->aw_host.ios.power_mode; + break; + case MMCBR_IVAR_VDD: + *(int *)result = sc->aw_host.ios.vdd; + break; + case MMCBR_IVAR_CAPS: + *(int *)result = sc->aw_host.caps; + break; + case MMCBR_IVAR_MAX_DATA: + *(int *)result = 65535; + break; + } + + return (0); +} + +static int +aw_mmc_write_ivar(device_t bus, device_t child, int which, + uintptr_t value) +{ + struct aw_mmc_softc *sc; + + sc = device_get_softc(bus); + switch (which) { + default: + return (EINVAL); + case MMCBR_IVAR_BUS_MODE: + sc->aw_host.ios.bus_mode = value; + break; + case MMCBR_IVAR_BUS_WIDTH: + sc->aw_host.ios.bus_width = value; + break; + case MMCBR_IVAR_CHIP_SELECT: + sc->aw_host.ios.chip_select = value; + break; + case MMCBR_IVAR_CLOCK: + sc->aw_host.ios.clock = value; + break; + case MMCBR_IVAR_MODE: + sc->aw_host.mode = value; + break; + case MMCBR_IVAR_OCR: + sc->aw_host.ocr = value; + break; + case MMCBR_IVAR_POWER_MODE: + sc->aw_host.ios.power_mode = value; + break; + case MMCBR_IVAR_VDD: + sc->aw_host.ios.vdd = 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); +} + +static int +aw_mmc_update_clock(struct aw_mmc_softc *sc, uint32_t clkon) +{ + uint32_t cmdreg; + int retry; + uint32_t ckcr; + + ckcr = AW_MMC_READ_4(sc, AW_MMC_CKCR); + ckcr &= ~(AW_MMC_CKCR_CCLK_ENB | AW_MMC_CKCR_CCLK_CTRL); + + if (clkon) + ckcr |= AW_MMC_CKCR_CCLK_ENB; + + AW_MMC_WRITE_4(sc, AW_MMC_CKCR, ckcr); + + cmdreg = AW_MMC_CMDR_LOAD | AW_MMC_CMDR_PRG_CLK | + AW_MMC_CMDR_WAIT_PRE_OVER; + AW_MMC_WRITE_4(sc, AW_MMC_CMDR, cmdreg); + retry = 0xfffff; + while (--retry > 0) { + if ((AW_MMC_READ_4(sc, AW_MMC_CMDR) & AW_MMC_CMDR_LOAD) == 0) { + AW_MMC_WRITE_4(sc, AW_MMC_RISR, 0xffffffff); + return (0); + } + DELAY(10); + } + AW_MMC_WRITE_4(sc, AW_MMC_RISR, 0xffffffff); + device_printf(sc->aw_dev, "timeout updating clock\n"); + + return (ETIMEDOUT); +} + +static int +aw_mmc_update_ios(device_t bus, device_t child) +{ + int error; + struct aw_mmc_softc *sc; + struct mmc_ios *ios; + uint32_t ckcr; + + sc = device_get_softc(bus); + + ios = &sc->aw_host.ios; + + /* Set the bus width. */ + switch (ios->bus_width) { + case bus_width_1: + AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR1); + break; + case bus_width_4: + AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR4); + break; + case bus_width_8: + AW_MMC_WRITE_4(sc, AW_MMC_BWDR, AW_MMC_BWDR8); + break; + } + + if (ios->clock) { + + /* Disable clock */ + error = aw_mmc_update_clock(sc, 0); + if (error != 0) + return (error); + + /* Reset the divider. */ + ckcr = AW_MMC_READ_4(sc, AW_MMC_CKCR); + ckcr &= ~AW_MMC_CKCR_CCLK_DIV; + AW_MMC_WRITE_4(sc, AW_MMC_CKCR, ckcr); + + /* Set the MMC clock. */ + error = clk_set_freq(sc->aw_clk_mmc, ios->clock, + CLK_SET_ROUND_DOWN); + if (error != 0) { + device_printf(sc->aw_dev, + "failed to set frequency to %u Hz: %d\n", + ios->clock, error); + return (error); + } + + /* Enable clock. */ + error = aw_mmc_update_clock(sc, 1); + if (error != 0) + return (error); + } + + + return (0); +} + +static int +aw_mmc_get_ro(device_t bus, device_t child) +{ + + return (0); +} + +static int +aw_mmc_acquire_host(device_t bus, device_t child) +{ + struct aw_mmc_softc *sc; + int error; + + sc = device_get_softc(bus); + AW_MMC_LOCK(sc); + while (sc->aw_bus_busy) { + error = msleep(sc, &sc->aw_mtx, PCATCH, "mmchw", 0); + if (error != 0) { + AW_MMC_UNLOCK(sc); + return (error); + } + } + sc->aw_bus_busy++; + AW_MMC_UNLOCK(sc); + + return (0); +} + +static int +aw_mmc_release_host(device_t bus, device_t child) +{ + struct aw_mmc_softc *sc; + + sc = device_get_softc(bus); + AW_MMC_LOCK(sc); + sc->aw_bus_busy--; + wakeup(sc); + AW_MMC_UNLOCK(sc); + + return (0); +} + +static device_method_t aw_mmc_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, aw_mmc_probe), + DEVMETHOD(device_attach, aw_mmc_attach), + DEVMETHOD(device_detach, aw_mmc_detach), + + /* Bus interface */ + DEVMETHOD(bus_read_ivar, aw_mmc_read_ivar), + DEVMETHOD(bus_write_ivar, aw_mmc_write_ivar), + + /* MMC bridge interface */ + DEVMETHOD(mmcbr_update_ios, aw_mmc_update_ios), + DEVMETHOD(mmcbr_request, aw_mmc_request), + DEVMETHOD(mmcbr_get_ro, aw_mmc_get_ro), + DEVMETHOD(mmcbr_acquire_host, aw_mmc_acquire_host), + DEVMETHOD(mmcbr_release_host, aw_mmc_release_host), + *** DIFF OUTPUT TRUNCATED AT 1000 LINES *** _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
