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freebsd-nq/sys/arm/at91/at91_mci.c
Kevin Lo d11bbab85d Remove pointless semicolons after label
2011-09-30 04:55:23 +00:00

784 lines
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/*-
* Copyright (c) 2006 Bernd Walter. All rights reserved.
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
* Copyright (c) 2010 Greg Ansley. 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 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 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/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/timetc.h>
#include <sys/watchdog.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/resource.h>
#include <machine/frame.h>
#include <machine/intr.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91_mcireg.h>
#include <arm/at91/at91_pdcreg.h>
#include <dev/mmc/bridge.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcbrvar.h>
#include "mmcbr_if.h"
#include "opt_at91.h"
#define BBSZ 512
struct at91_mci_softc {
void *intrhand; /* Interrupt handle */
device_t dev;
int sc_cap;
#define CAP_HAS_4WIRE 1 /* Has 4 wire bus */
#define CAP_NEEDS_BYTESWAP 2 /* broken hardware needing bounce */
int flags;
int has_4wire;
#define CMD_STARTED 1
#define STOP_STARTED 2
struct resource *irq_res; /* IRQ resource */
struct resource *mem_res; /* Memory resource */
struct mtx sc_mtx;
bus_dma_tag_t dmatag;
bus_dmamap_t map;
int mapped;
struct mmc_host host;
int bus_busy;
struct mmc_request *req;
struct mmc_command *curcmd;
char bounce_buffer[BBSZ];
};
static inline uint32_t
RD4(struct at91_mci_softc *sc, bus_size_t off)
{
return (bus_read_4(sc->mem_res, off));
}
static inline void
WR4(struct at91_mci_softc *sc, bus_size_t off, uint32_t val)
{
bus_write_4(sc->mem_res, off, val);
}
/* bus entry points */
static int at91_mci_probe(device_t dev);
static int at91_mci_attach(device_t dev);
static int at91_mci_detach(device_t dev);
static void at91_mci_intr(void *);
/* helper routines */
static int at91_mci_activate(device_t dev);
static void at91_mci_deactivate(device_t dev);
#define AT91_MCI_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define AT91_MCI_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define AT91_MCI_LOCK_INIT(_sc) \
mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
"mci", MTX_DEF)
#define AT91_MCI_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
#define AT91_MCI_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
#define AT91_MCI_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
static void
at91_mci_pdc_disable(struct at91_mci_softc *sc)
{
WR4(sc, PDC_PTCR, PDC_PTCR_TXTDIS | PDC_PTCR_RXTDIS);
WR4(sc, PDC_RPR, 0);
WR4(sc, PDC_RCR, 0);
WR4(sc, PDC_RNPR, 0);
WR4(sc, PDC_RNCR, 0);
WR4(sc, PDC_TPR, 0);
WR4(sc, PDC_TCR, 0);
WR4(sc, PDC_TNPR, 0);
WR4(sc, PDC_TNCR, 0);
}
static void
at91_mci_init(device_t dev)
{
struct at91_mci_softc *sc = device_get_softc(dev);
WR4(sc, MCI_CR, MCI_CR_MCIEN); /* Enable controller */
WR4(sc, MCI_IDR, 0xffffffff); /* Turn off interrupts */
WR4(sc, MCI_DTOR, MCI_DTOR_DTOMUL_1M | 1);
WR4(sc, MCI_MR, 0x834a); // XXX GROSS HACK FROM LINUX
#ifndef AT91_MCI_SLOT_B
WR4(sc, MCI_SDCR, 0); /* SLOT A, 1 bit bus */
#else
/* XXX Really should add second "unit" but nobody using using
* a two slot card that we know of. XXX */
WR4(sc, MCI_SDCR, 1); /* SLOT B, 1 bit bus */
#endif
}
static void
at91_mci_fini(device_t dev)
{
struct at91_mci_softc *sc = device_get_softc(dev);
WR4(sc, MCI_IDR, 0xffffffff); /* Turn off interrupts */
at91_mci_pdc_disable(sc);
WR4(sc, MCI_CR, MCI_CR_MCIDIS | MCI_CR_SWRST); /* Put the device into reset */
}
static int
at91_mci_probe(device_t dev)
{
device_set_desc(dev, "MCI mmc/sd host bridge");
return (0);
}
static int
at91_mci_attach(device_t dev)
{
struct at91_mci_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *sctx;
struct sysctl_oid *soid;
device_t child;
int err;
sc->dev = dev;
sc->sc_cap = 0;
if (at91_is_rm92())
sc->sc_cap |= CAP_NEEDS_BYTESWAP;
err = at91_mci_activate(dev);
if (err)
goto out;
AT91_MCI_LOCK_INIT(sc);
/*
* Allocate DMA tags and maps
*/
err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MAXPHYS, 1,
MAXPHYS, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->dmatag);
if (err != 0)
goto out;
err = bus_dmamap_create(sc->dmatag, 0, &sc->map);
if (err != 0)
goto out;
at91_mci_fini(dev);
at91_mci_init(dev);
/*
* Activate the interrupt
*/
err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, at91_mci_intr, sc, &sc->intrhand);
if (err) {
AT91_MCI_LOCK_DESTROY(sc);
goto out;
}
sctx = device_get_sysctl_ctx(dev);
soid = device_get_sysctl_tree(dev);
SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "4wire",
CTLFLAG_RW, &sc->has_4wire, 0, "has 4 wire SD Card bus");
#ifdef AT91_MCI_HAS_4WIRE
sc->has_4wire = 1;
#endif
if (sc->has_4wire)
sc->sc_cap |= CAP_HAS_4WIRE;
sc->host.f_min = at91_master_clock / 512;
sc->host.f_min = 375000;
sc->host.f_max = at91_master_clock / 2;
if (sc->host.f_max > 50000000)
sc->host.f_max = 50000000; /* Limit to 50MHz */
sc->host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340;
sc->host.caps = 0;
if (sc->sc_cap & CAP_HAS_4WIRE)
sc->host.caps |= MMC_CAP_4_BIT_DATA;
child = device_add_child(dev, "mmc", 0);
device_set_ivars(dev, &sc->host);
err = bus_generic_attach(dev);
out:
if (err)
at91_mci_deactivate(dev);
return (err);
}
static int
at91_mci_detach(device_t dev)
{
at91_mci_fini(dev);
at91_mci_deactivate(dev);
return (EBUSY); /* XXX */
}
static int
at91_mci_activate(device_t dev)
{
struct at91_mci_softc *sc;
int rid;
sc = device_get_softc(dev);
rid = 0;
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->mem_res == NULL)
goto errout;
rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->irq_res == NULL)
goto errout;
return (0);
errout:
at91_mci_deactivate(dev);
return (ENOMEM);
}
static void
at91_mci_deactivate(device_t dev)
{
struct at91_mci_softc *sc;
sc = device_get_softc(dev);
if (sc->intrhand)
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
sc->intrhand = 0;
bus_generic_detach(sc->dev);
if (sc->mem_res)
bus_release_resource(dev, SYS_RES_IOPORT,
rman_get_rid(sc->mem_res), sc->mem_res);
sc->mem_res = 0;
if (sc->irq_res)
bus_release_resource(dev, SYS_RES_IRQ,
rman_get_rid(sc->irq_res), sc->irq_res);
sc->irq_res = 0;
return;
}
static void
at91_mci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
if (error != 0)
return;
*(bus_addr_t *)arg = segs[0].ds_addr;
}
static int
at91_mci_update_ios(device_t brdev, device_t reqdev)
{
struct at91_mci_softc *sc;
struct mmc_host *host;
struct mmc_ios *ios;
uint32_t clkdiv;
sc = device_get_softc(brdev);
host = &sc->host;
ios = &host->ios;
// bus mode?
if (ios->clock == 0) {
WR4(sc, MCI_CR, MCI_CR_MCIDIS);
clkdiv = 0;
} else {
WR4(sc, MCI_CR, MCI_CR_MCIEN);
if ((at91_master_clock % (ios->clock * 2)) == 0)
clkdiv = ((at91_master_clock / ios->clock) / 2) - 1;
else
clkdiv = (at91_master_clock / ios->clock) / 2;
}
if (ios->bus_width == bus_width_4)
WR4(sc, MCI_SDCR, RD4(sc, MCI_SDCR) | MCI_SDCR_SDCBUS);
else
WR4(sc, MCI_SDCR, RD4(sc, MCI_SDCR) & ~MCI_SDCR_SDCBUS);
WR4(sc, MCI_MR, (RD4(sc, MCI_MR) & ~MCI_MR_CLKDIV) | clkdiv);
/* Do we need a settle time here? */
/* XXX We need to turn the device on/off here with a GPIO pin */
return (0);
}
static void
at91_mci_start_cmd(struct at91_mci_softc *sc, struct mmc_command *cmd)
{
uint32_t cmdr, ier = 0, mr;
uint32_t *src, *dst;
int i;
struct mmc_data *data;
void *vaddr;
bus_addr_t paddr;
sc->curcmd = cmd;
data = cmd->data;
cmdr = cmd->opcode;
/* XXX Upper layers don't always set this */
cmd->mrq = sc->req;
if (MMC_RSP(cmd->flags) == MMC_RSP_NONE)
cmdr |= MCI_CMDR_RSPTYP_NO;
else {
/* Allow big timeout for responses */
cmdr |= MCI_CMDR_MAXLAT;
if (cmd->flags & MMC_RSP_136)
cmdr |= MCI_CMDR_RSPTYP_136;
else
cmdr |= MCI_CMDR_RSPTYP_48;
}
if (cmd->opcode == MMC_STOP_TRANSMISSION)
cmdr |= MCI_CMDR_TRCMD_STOP;
if (sc->host.ios.bus_mode == opendrain)
cmdr |= MCI_CMDR_OPDCMD;
if (!data) {
// The no data case is fairly simple
at91_mci_pdc_disable(sc);
// printf("CMDR %x ARGR %x\n", cmdr, cmd->arg);
WR4(sc, MCI_ARGR, cmd->arg);
WR4(sc, MCI_CMDR, cmdr);
WR4(sc, MCI_IER, MCI_SR_ERROR | MCI_SR_CMDRDY);
return;
}
if (data->flags & MMC_DATA_READ)
cmdr |= MCI_CMDR_TRDIR;
if (data->flags & (MMC_DATA_READ | MMC_DATA_WRITE))
cmdr |= MCI_CMDR_TRCMD_START;
if (data->flags & MMC_DATA_STREAM)
cmdr |= MCI_CMDR_TRTYP_STREAM;
if (data->flags & MMC_DATA_MULTI)
cmdr |= MCI_CMDR_TRTYP_MULTIPLE;
// Set block size and turn on PDC mode for dma xfer and disable
// PDC until we're ready.
mr = RD4(sc, MCI_MR) & ~MCI_MR_BLKLEN;
WR4(sc, MCI_MR, mr | (data->len << 16) | MCI_MR_PDCMODE);
WR4(sc, PDC_PTCR, PDC_PTCR_RXTDIS | PDC_PTCR_TXTDIS);
if (cmdr & MCI_CMDR_TRCMD_START) {
if (cmdr & MCI_CMDR_TRDIR)
vaddr = cmd->data->data;
else {
/* Use bounce buffer even if we don't need
* byteswap, since buffer may straddle a page
* boundry, and we don't handle multi-segment
* transfers in hardware.
* (page issues seen from 'bsdlabel -w' which
* uses raw geom access to the volume).
* Greg Ansley (gja (at) ansley.com)
*/
vaddr = sc->bounce_buffer;
src = (uint32_t *)cmd->data->data;
dst = (uint32_t *)vaddr;
if (sc->sc_cap & CAP_NEEDS_BYTESWAP) {
for (i = 0; i < data->len / 4; i++)
dst[i] = bswap32(src[i]);
} else
memcpy(dst, src, data->len);
}
data->xfer_len = 0;
if (bus_dmamap_load(sc->dmatag, sc->map, vaddr, data->len,
at91_mci_getaddr, &paddr, 0) != 0) {
cmd->error = MMC_ERR_NO_MEMORY;
sc->req = NULL;
sc->curcmd = NULL;
cmd->mrq->done(cmd->mrq);
return;
}
sc->mapped++;
if (cmdr & MCI_CMDR_TRDIR) {
bus_dmamap_sync(sc->dmatag, sc->map, BUS_DMASYNC_PREREAD);
WR4(sc, PDC_RPR, paddr);
WR4(sc, PDC_RCR, data->len / 4);
ier = MCI_SR_ENDRX;
} else {
bus_dmamap_sync(sc->dmatag, sc->map, BUS_DMASYNC_PREWRITE);
WR4(sc, PDC_TPR, paddr);
WR4(sc, PDC_TCR, data->len / 4);
ier = MCI_SR_TXBUFE;
}
}
// printf("CMDR %x ARGR %x with data\n", cmdr, cmd->arg);
WR4(sc, MCI_ARGR, cmd->arg);
if (cmdr & MCI_CMDR_TRCMD_START) {
if (cmdr & MCI_CMDR_TRDIR) {
WR4(sc, PDC_PTCR, PDC_PTCR_RXTEN);
WR4(sc, MCI_CMDR, cmdr);
} else {
WR4(sc, MCI_CMDR, cmdr);
WR4(sc, PDC_PTCR, PDC_PTCR_TXTEN);
}
}
WR4(sc, MCI_IER, MCI_SR_ERROR | ier);
}
static void
at91_mci_start(struct at91_mci_softc *sc)
{
struct mmc_request *req;
req = sc->req;
if (req == NULL)
return;
// assert locked
if (!(sc->flags & CMD_STARTED)) {
sc->flags |= CMD_STARTED;
// printf("Starting CMD\n");
at91_mci_start_cmd(sc, req->cmd);
return;
}
if (!(sc->flags & STOP_STARTED) && req->stop) {
// printf("Starting Stop\n");
sc->flags |= STOP_STARTED;
at91_mci_start_cmd(sc, req->stop);
return;
}
/* We must be done -- bad idea to do this while locked? */
sc->req = NULL;
sc->curcmd = NULL;
req->done(req);
}
static int
at91_mci_request(device_t brdev, device_t reqdev, struct mmc_request *req)
{
struct at91_mci_softc *sc = device_get_softc(brdev);
AT91_MCI_LOCK(sc);
// XXX do we want to be able to queue up multiple commands?
// XXX sounds like a good idea, but all protocols are sync, so
// XXX maybe the idea is naive...
if (sc->req != NULL) {
AT91_MCI_UNLOCK(sc);
return (EBUSY);
}
sc->req = req;
sc->flags = 0;
at91_mci_start(sc);
AT91_MCI_UNLOCK(sc);
return (0);
}
static int
at91_mci_get_ro(device_t brdev, device_t reqdev)
{
return (0);
}
static int
at91_mci_acquire_host(device_t brdev, device_t reqdev)
{
struct at91_mci_softc *sc = device_get_softc(brdev);
int err = 0;
AT91_MCI_LOCK(sc);
while (sc->bus_busy)
msleep(sc, &sc->sc_mtx, PZERO, "mciah", hz / 5);
sc->bus_busy++;
AT91_MCI_UNLOCK(sc);
return (err);
}
static int
at91_mci_release_host(device_t brdev, device_t reqdev)
{
struct at91_mci_softc *sc = device_get_softc(brdev);
AT91_MCI_LOCK(sc);
sc->bus_busy--;
wakeup(sc);
AT91_MCI_UNLOCK(sc);
return (0);
}
static void
at91_mci_read_done(struct at91_mci_softc *sc)
{
uint32_t *walker;
struct mmc_command *cmd;
int i, len;
cmd = sc->curcmd;
bus_dmamap_sync(sc->dmatag, sc->map, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->dmatag, sc->map);
sc->mapped--;
if (sc->sc_cap & CAP_NEEDS_BYTESWAP) {
walker = (uint32_t *)cmd->data->data;
len = cmd->data->len / 4;
for (i = 0; i < len; i++)
walker[i] = bswap32(walker[i]);
}
// Finish up the sequence...
WR4(sc, MCI_IDR, MCI_SR_ENDRX);
WR4(sc, MCI_IER, MCI_SR_RXBUFF);
WR4(sc, PDC_PTCR, PDC_PTCR_RXTDIS | PDC_PTCR_TXTDIS);
}
static void
at91_mci_xmit_done(struct at91_mci_softc *sc)
{
// Finish up the sequence...
WR4(sc, PDC_PTCR, PDC_PTCR_RXTDIS | PDC_PTCR_TXTDIS);
WR4(sc, MCI_IDR, MCI_SR_TXBUFE);
WR4(sc, MCI_IER, MCI_SR_NOTBUSY);
bus_dmamap_sync(sc->dmatag, sc->map, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->dmatag, sc->map);
sc->mapped--;
}
static void
at91_mci_intr(void *arg)
{
struct at91_mci_softc *sc = (struct at91_mci_softc*)arg;
uint32_t sr;
int i, done = 0;
struct mmc_command *cmd;
AT91_MCI_LOCK(sc);
sr = RD4(sc, MCI_SR) & RD4(sc, MCI_IMR);
// printf("i 0x%x\n", sr);
cmd = sc->curcmd;
if (sr & MCI_SR_ERROR) {
// Ignore CRC errors on CMD2 and ACMD47, per relevant standards
if ((sr & MCI_SR_RCRCE) && (cmd->opcode == MMC_SEND_OP_COND ||
cmd->opcode == ACMD_SD_SEND_OP_COND))
cmd->error = MMC_ERR_NONE;
else if (sr & (MCI_SR_RTOE | MCI_SR_DTOE))
cmd->error = MMC_ERR_TIMEOUT;
else if (sr & (MCI_SR_RCRCE | MCI_SR_DCRCE))
cmd->error = MMC_ERR_BADCRC;
else if (sr & (MCI_SR_OVRE | MCI_SR_UNRE))
cmd->error = MMC_ERR_FIFO;
else
cmd->error = MMC_ERR_FAILED;
done = 1;
if (sc->mapped && cmd->error) {
bus_dmamap_unload(sc->dmatag, sc->map);
sc->mapped--;
}
} else {
if (sr & MCI_SR_TXBUFE) {
// printf("TXBUFE\n");
at91_mci_xmit_done(sc);
}
if (sr & MCI_SR_RXBUFF) {
// printf("RXBUFF\n");
WR4(sc, MCI_IDR, MCI_SR_RXBUFF);
WR4(sc, MCI_IER, MCI_SR_CMDRDY);
}
if (sr & MCI_SR_ENDTX) {
// printf("ENDTX\n");
}
if (sr & MCI_SR_ENDRX) {
// printf("ENDRX\n");
at91_mci_read_done(sc);
}
if (sr & MCI_SR_NOTBUSY) {
// printf("NOTBUSY\n");
WR4(sc, MCI_IDR, MCI_SR_NOTBUSY);
WR4(sc, MCI_IER, MCI_SR_CMDRDY);
}
if (sr & MCI_SR_DTIP) {
// printf("Data transfer in progress\n");
}
if (sr & MCI_SR_BLKE) {
// printf("Block transfer end\n");
}
if (sr & MCI_SR_TXRDY) {
// printf("Ready to transmit\n");
}
if (sr & MCI_SR_RXRDY) {
// printf("Ready to receive\n");
}
if (sr & MCI_SR_CMDRDY) {
// printf("Command ready\n");
done = 1;
cmd->error = MMC_ERR_NONE;
}
}
if (done) {
WR4(sc, MCI_IDR, 0xffffffff);
if (cmd != NULL && (cmd->flags & MMC_RSP_PRESENT)) {
for (i = 0; i < ((cmd->flags & MMC_RSP_136) ? 4 : 1);
i++) {
cmd->resp[i] = RD4(sc, MCI_RSPR + i * 4);
// printf("RSPR[%d] = %x\n", i, cmd->resp[i]);
}
}
at91_mci_start(sc);
}
AT91_MCI_UNLOCK(sc);
}
static int
at91_mci_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
{
struct at91_mci_softc *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_CAPS:
if (sc->has_4wire) {
sc->sc_cap |= CAP_HAS_4WIRE;
sc->host.caps |= MMC_CAP_4_BIT_DATA;
} else {
sc->sc_cap &= ~CAP_HAS_4WIRE;
sc->host.caps &= ~MMC_CAP_4_BIT_DATA;
}
*(int *)result = sc->host.caps;
break;
case MMCBR_IVAR_MAX_DATA:
*(int *)result = 1;
break;
}
return (0);
}
static int
at91_mci_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
{
struct at91_mci_softc *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;
/* 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 device_method_t at91_mci_methods[] = {
/* device_if */
DEVMETHOD(device_probe, at91_mci_probe),
DEVMETHOD(device_attach, at91_mci_attach),
DEVMETHOD(device_detach, at91_mci_detach),
/* Bus interface */
DEVMETHOD(bus_read_ivar, at91_mci_read_ivar),
DEVMETHOD(bus_write_ivar, at91_mci_write_ivar),
/* mmcbr_if */
DEVMETHOD(mmcbr_update_ios, at91_mci_update_ios),
DEVMETHOD(mmcbr_request, at91_mci_request),
DEVMETHOD(mmcbr_get_ro, at91_mci_get_ro),
DEVMETHOD(mmcbr_acquire_host, at91_mci_acquire_host),
DEVMETHOD(mmcbr_release_host, at91_mci_release_host),
{0, 0},
};
static driver_t at91_mci_driver = {
"at91_mci",
at91_mci_methods,
sizeof(struct at91_mci_softc),
};
static devclass_t at91_mci_devclass;
DRIVER_MODULE(at91_mci, atmelarm, at91_mci_driver, at91_mci_devclass, 0, 0);
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