2b0f0faeb6
New upstream DTS is using this now for A20 SoC. MFC after: 3 days
924 lines
23 KiB
C
924 lines
23 KiB
C
/*-
|
|
* 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/mmcreg.h>
|
|
#include <dev/mmc/mmcbrvar.h>
|
|
|
|
#include <arm/allwinner/a10_mmc.h>
|
|
#include <dev/extres/clk/clk.h>
|
|
#include <dev/extres/hwreset/hwreset.h>
|
|
|
|
#define A10_MMC_MEMRES 0
|
|
#define A10_MMC_IRQRES 1
|
|
#define A10_MMC_RESSZ 2
|
|
#define A10_MMC_DMA_SEGS ((MAXPHYS / PAGE_SIZE) + 1)
|
|
#define A10_MMC_DMA_MAX_SIZE 0x2000
|
|
#define A10_MMC_DMA_FTRGLEVEL 0x20070008
|
|
#define A10_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},
|
|
{NULL, 0}
|
|
};
|
|
|
|
struct a10_mmc_softc {
|
|
device_t a10_dev;
|
|
clk_t a10_clk_ahb;
|
|
clk_t a10_clk_mmc;
|
|
hwreset_t a10_rst_ahb;
|
|
int a10_bus_busy;
|
|
int a10_resid;
|
|
int a10_timeout;
|
|
struct callout a10_timeoutc;
|
|
struct mmc_host a10_host;
|
|
struct mmc_request * a10_req;
|
|
struct mtx a10_mtx;
|
|
struct resource * a10_res[A10_MMC_RESSZ];
|
|
uint32_t a10_intr;
|
|
uint32_t a10_intr_wait;
|
|
void * a10_intrhand;
|
|
|
|
/* Fields required for DMA access. */
|
|
bus_addr_t a10_dma_desc_phys;
|
|
bus_dmamap_t a10_dma_map;
|
|
bus_dma_tag_t a10_dma_tag;
|
|
void * a10_dma_desc;
|
|
bus_dmamap_t a10_dma_buf_map;
|
|
bus_dma_tag_t a10_dma_buf_tag;
|
|
int a10_dma_map_err;
|
|
};
|
|
|
|
static struct resource_spec a10_mmc_res_spec[] = {
|
|
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
|
|
{ SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
|
|
{ -1, 0, 0 }
|
|
};
|
|
|
|
static int a10_mmc_probe(device_t);
|
|
static int a10_mmc_attach(device_t);
|
|
static int a10_mmc_detach(device_t);
|
|
static int a10_mmc_setup_dma(struct a10_mmc_softc *);
|
|
static int a10_mmc_reset(struct a10_mmc_softc *);
|
|
static void a10_mmc_intr(void *);
|
|
static int a10_mmc_update_clock(struct a10_mmc_softc *, uint32_t);
|
|
|
|
static int a10_mmc_update_ios(device_t, device_t);
|
|
static int a10_mmc_request(device_t, device_t, struct mmc_request *);
|
|
static int a10_mmc_get_ro(device_t, device_t);
|
|
static int a10_mmc_acquire_host(device_t, device_t);
|
|
static int a10_mmc_release_host(device_t, device_t);
|
|
|
|
#define A10_MMC_LOCK(_sc) mtx_lock(&(_sc)->a10_mtx)
|
|
#define A10_MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->a10_mtx)
|
|
#define A10_MMC_READ_4(_sc, _reg) \
|
|
bus_read_4((_sc)->a10_res[A10_MMC_MEMRES], _reg)
|
|
#define A10_MMC_WRITE_4(_sc, _reg, _value) \
|
|
bus_write_4((_sc)->a10_res[A10_MMC_MEMRES], _reg, _value)
|
|
|
|
static int
|
|
a10_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
|
|
a10_mmc_attach(device_t dev)
|
|
{
|
|
device_t child;
|
|
struct a10_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->a10_dev = dev;
|
|
sc->a10_req = NULL;
|
|
if (bus_alloc_resources(dev, a10_mmc_res_spec, sc->a10_res) != 0) {
|
|
device_printf(dev, "cannot allocate device resources\n");
|
|
return (ENXIO);
|
|
}
|
|
if (bus_setup_intr(dev, sc->a10_res[A10_MMC_IRQRES],
|
|
INTR_TYPE_MISC | INTR_MPSAFE, NULL, a10_mmc_intr, sc,
|
|
&sc->a10_intrhand)) {
|
|
bus_release_resources(dev, a10_mmc_res_spec, sc->a10_res);
|
|
device_printf(dev, "cannot setup interrupt handler\n");
|
|
return (ENXIO);
|
|
}
|
|
mtx_init(&sc->a10_mtx, device_get_nameunit(sc->a10_dev), "a10_mmc",
|
|
MTX_DEF);
|
|
callout_init_mtx(&sc->a10_timeoutc, &sc->a10_mtx, 0);
|
|
|
|
/* De-assert reset */
|
|
if (hwreset_get_by_ofw_name(dev, 0, "ahb", &sc->a10_rst_ahb) == 0) {
|
|
error = hwreset_deassert(sc->a10_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->a10_clk_ahb);
|
|
if (error != 0) {
|
|
device_printf(dev, "cannot get ahb clock\n");
|
|
goto fail;
|
|
}
|
|
error = clk_enable(sc->a10_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->a10_clk_mmc);
|
|
if (error != 0) {
|
|
device_printf(dev, "cannot get mmc clock\n");
|
|
goto fail;
|
|
}
|
|
error = clk_set_freq(sc->a10_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->a10_clk_mmc);
|
|
if (error != 0) {
|
|
device_printf(dev, "cannot enable mmc clock\n");
|
|
goto fail;
|
|
}
|
|
|
|
sc->a10_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->a10_timeout, 0, "Request timeout in seconds");
|
|
|
|
/* Hardware reset */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_HWRST, 1);
|
|
DELAY(100);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_HWRST, 0);
|
|
DELAY(500);
|
|
|
|
/* Soft Reset controller. */
|
|
if (a10_mmc_reset(sc) != 0) {
|
|
device_printf(dev, "cannot reset the controller\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (a10_mmc_setup_dma(sc) != 0) {
|
|
device_printf(sc->a10_dev, "Couldn't setup DMA!\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (OF_getencprop(node, "bus-width", &bus_width, sizeof(uint32_t)) <= 0)
|
|
bus_width = 4;
|
|
|
|
sc->a10_host.f_min = 400000;
|
|
sc->a10_host.f_max = 52000000;
|
|
sc->a10_host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340;
|
|
sc->a10_host.mode = mode_sd;
|
|
sc->a10_host.caps = MMC_CAP_HSPEED;
|
|
if (bus_width >= 4)
|
|
sc->a10_host.caps |= MMC_CAP_4_BIT_DATA;
|
|
if (bus_width >= 8)
|
|
sc->a10_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->a10_timeoutc);
|
|
mtx_destroy(&sc->a10_mtx);
|
|
bus_teardown_intr(dev, sc->a10_res[A10_MMC_IRQRES], sc->a10_intrhand);
|
|
bus_release_resources(dev, a10_mmc_res_spec, sc->a10_res);
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_detach(device_t dev)
|
|
{
|
|
|
|
return (EBUSY);
|
|
}
|
|
|
|
static void
|
|
a10_dma_desc_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = (struct a10_mmc_softc *)arg;
|
|
if (err) {
|
|
sc->a10_dma_map_err = err;
|
|
return;
|
|
}
|
|
sc->a10_dma_desc_phys = segs[0].ds_addr;
|
|
}
|
|
|
|
static int
|
|
a10_mmc_setup_dma(struct a10_mmc_softc *sc)
|
|
{
|
|
int dma_desc_size, error;
|
|
|
|
/* Allocate the DMA descriptor memory. */
|
|
dma_desc_size = sizeof(struct a10_mmc_dma_desc) * A10_MMC_DMA_SEGS;
|
|
error = bus_dma_tag_create(bus_get_dma_tag(sc->a10_dev),
|
|
A10_MMC_DMA_ALIGN, 0,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
|
|
dma_desc_size, 1, dma_desc_size, 0, NULL, NULL, &sc->a10_dma_tag);
|
|
if (error)
|
|
return (error);
|
|
error = bus_dmamem_alloc(sc->a10_dma_tag, &sc->a10_dma_desc,
|
|
BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->a10_dma_map);
|
|
if (error)
|
|
return (error);
|
|
|
|
error = bus_dmamap_load(sc->a10_dma_tag, sc->a10_dma_map,
|
|
sc->a10_dma_desc, dma_desc_size, a10_dma_desc_cb, sc, 0);
|
|
if (error)
|
|
return (error);
|
|
if (sc->a10_dma_map_err)
|
|
return (sc->a10_dma_map_err);
|
|
|
|
/* Create the DMA map for data transfers. */
|
|
error = bus_dma_tag_create(bus_get_dma_tag(sc->a10_dev),
|
|
A10_MMC_DMA_ALIGN, 0,
|
|
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
|
|
A10_MMC_DMA_MAX_SIZE * A10_MMC_DMA_SEGS, A10_MMC_DMA_SEGS,
|
|
A10_MMC_DMA_MAX_SIZE, BUS_DMA_ALLOCNOW, NULL, NULL,
|
|
&sc->a10_dma_buf_tag);
|
|
if (error)
|
|
return (error);
|
|
error = bus_dmamap_create(sc->a10_dma_buf_tag, 0,
|
|
&sc->a10_dma_buf_map);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
a10_dma_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err)
|
|
{
|
|
int i;
|
|
struct a10_mmc_dma_desc *dma_desc;
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = (struct a10_mmc_softc *)arg;
|
|
sc->a10_dma_map_err = err;
|
|
|
|
if (err)
|
|
return;
|
|
|
|
dma_desc = sc->a10_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 = A10_MMC_DMA_CONFIG_CH |
|
|
A10_MMC_DMA_CONFIG_OWN;
|
|
if (i == 0)
|
|
dma_desc[i].config |= A10_MMC_DMA_CONFIG_FD;
|
|
if (i < (nsegs - 1)) {
|
|
dma_desc[i].config |= A10_MMC_DMA_CONFIG_DIC;
|
|
dma_desc[i].next = sc->a10_dma_desc_phys +
|
|
((i + 1) * sizeof(struct a10_mmc_dma_desc));
|
|
} else {
|
|
dma_desc[i].config |= A10_MMC_DMA_CONFIG_LD |
|
|
A10_MMC_DMA_CONFIG_ER;
|
|
dma_desc[i].next = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
a10_mmc_prepare_dma(struct a10_mmc_softc *sc)
|
|
{
|
|
bus_dmasync_op_t sync_op;
|
|
int error;
|
|
struct mmc_command *cmd;
|
|
uint32_t val;
|
|
|
|
cmd = sc->a10_req->cmd;
|
|
if (cmd->data->len > A10_MMC_DMA_MAX_SIZE * A10_MMC_DMA_SEGS)
|
|
return (EFBIG);
|
|
error = bus_dmamap_load(sc->a10_dma_buf_tag, sc->a10_dma_buf_map,
|
|
cmd->data->data, cmd->data->len, a10_dma_cb, sc, 0);
|
|
if (error)
|
|
return (error);
|
|
if (sc->a10_dma_map_err)
|
|
return (sc->a10_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->a10_dma_buf_tag, sc->a10_dma_buf_map, sync_op);
|
|
bus_dmamap_sync(sc->a10_dma_tag, sc->a10_dma_map, BUS_DMASYNC_PREWRITE);
|
|
|
|
/* Enable DMA */
|
|
val = A10_MMC_READ_4(sc, A10_MMC_GCTL);
|
|
val &= ~A10_MMC_CTRL_FIFO_AC_MOD;
|
|
val |= A10_MMC_CTRL_DMA_ENB;
|
|
A10_MMC_WRITE_4(sc, A10_MMC_GCTL, val);
|
|
|
|
/* Reset DMA */
|
|
val |= A10_MMC_CTRL_DMA_RST;
|
|
A10_MMC_WRITE_4(sc, A10_MMC_GCTL, val);
|
|
|
|
A10_MMC_WRITE_4(sc, A10_MMC_DMAC, A10_MMC_DMAC_IDMAC_SOFT_RST);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_DMAC,
|
|
A10_MMC_DMAC_IDMAC_IDMA_ON | A10_MMC_DMAC_IDMAC_FIX_BURST);
|
|
|
|
/* Enable RX or TX DMA interrupt */
|
|
if (cmd->data->flags & MMC_DATA_WRITE)
|
|
val |= A10_MMC_IDST_TX_INT;
|
|
else
|
|
val |= A10_MMC_IDST_RX_INT;
|
|
A10_MMC_WRITE_4(sc, A10_MMC_IDIE, val);
|
|
|
|
/* Set DMA descritptor list address */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_DLBA, sc->a10_dma_desc_phys);
|
|
|
|
/* FIFO trigger level */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_FWLR, A10_MMC_DMA_FTRGLEVEL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_reset(struct a10_mmc_softc *sc)
|
|
{
|
|
int timeout;
|
|
|
|
A10_MMC_WRITE_4(sc, A10_MMC_GCTL, A10_MMC_RESET);
|
|
timeout = 1000;
|
|
while (--timeout > 0) {
|
|
if ((A10_MMC_READ_4(sc, A10_MMC_GCTL) & A10_MMC_RESET) == 0)
|
|
break;
|
|
DELAY(100);
|
|
}
|
|
if (timeout == 0)
|
|
return (ETIMEDOUT);
|
|
|
|
/* Set the timeout. */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_TMOR,
|
|
A10_MMC_TMOR_DTO_LMT_SHIFT(A10_MMC_TMOR_DTO_LMT_MASK) |
|
|
A10_MMC_TMOR_RTO_LMT_SHIFT(A10_MMC_TMOR_RTO_LMT_MASK));
|
|
|
|
/* Clear pending interrupts. */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_RISR, 0xffffffff);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_IDST, 0xffffffff);
|
|
/* Unmask interrupts. */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_IMKR,
|
|
A10_MMC_INT_CMD_DONE | A10_MMC_INT_ERR_BIT |
|
|
A10_MMC_INT_DATA_OVER | A10_MMC_INT_AUTO_STOP_DONE);
|
|
/* Enable interrupts and AHB access. */
|
|
A10_MMC_WRITE_4(sc, A10_MMC_GCTL,
|
|
A10_MMC_READ_4(sc, A10_MMC_GCTL) | A10_MMC_CTRL_INT_ENB);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
a10_mmc_req_done(struct a10_mmc_softc *sc)
|
|
{
|
|
struct mmc_command *cmd;
|
|
struct mmc_request *req;
|
|
uint32_t val, mask;
|
|
int retry;
|
|
|
|
cmd = sc->a10_req->cmd;
|
|
if (cmd->error != MMC_ERR_NONE) {
|
|
/* Reset the FIFO and DMA engines. */
|
|
mask = A10_MMC_CTRL_FIFO_RST | A10_MMC_CTRL_DMA_RST;
|
|
val = A10_MMC_READ_4(sc, A10_MMC_GCTL);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_GCTL, val | mask);
|
|
|
|
retry = A10_MMC_RESET_RETRY;
|
|
while (--retry > 0) {
|
|
val = A10_MMC_READ_4(sc, A10_MMC_GCTL);
|
|
if ((val & mask) == 0)
|
|
break;
|
|
DELAY(10);
|
|
}
|
|
if (retry == 0)
|
|
device_printf(sc->a10_dev,
|
|
"timeout resetting DMA/FIFO\n");
|
|
a10_mmc_update_clock(sc, 1);
|
|
}
|
|
|
|
req = sc->a10_req;
|
|
callout_stop(&sc->a10_timeoutc);
|
|
sc->a10_req = NULL;
|
|
sc->a10_intr = 0;
|
|
sc->a10_resid = 0;
|
|
sc->a10_dma_map_err = 0;
|
|
sc->a10_intr_wait = 0;
|
|
req->done(req);
|
|
}
|
|
|
|
static void
|
|
a10_mmc_req_ok(struct a10_mmc_softc *sc)
|
|
{
|
|
int timeout;
|
|
struct mmc_command *cmd;
|
|
uint32_t status;
|
|
|
|
timeout = 1000;
|
|
while (--timeout > 0) {
|
|
status = A10_MMC_READ_4(sc, A10_MMC_STAR);
|
|
if ((status & A10_MMC_STAR_CARD_BUSY) == 0)
|
|
break;
|
|
DELAY(1000);
|
|
}
|
|
cmd = sc->a10_req->cmd;
|
|
if (timeout == 0) {
|
|
cmd->error = MMC_ERR_FAILED;
|
|
a10_mmc_req_done(sc);
|
|
return;
|
|
}
|
|
if (cmd->flags & MMC_RSP_PRESENT) {
|
|
if (cmd->flags & MMC_RSP_136) {
|
|
cmd->resp[0] = A10_MMC_READ_4(sc, A10_MMC_RESP3);
|
|
cmd->resp[1] = A10_MMC_READ_4(sc, A10_MMC_RESP2);
|
|
cmd->resp[2] = A10_MMC_READ_4(sc, A10_MMC_RESP1);
|
|
cmd->resp[3] = A10_MMC_READ_4(sc, A10_MMC_RESP0);
|
|
} else
|
|
cmd->resp[0] = A10_MMC_READ_4(sc, A10_MMC_RESP0);
|
|
}
|
|
/* All data has been transferred ? */
|
|
if (cmd->data != NULL && (sc->a10_resid << 2) < cmd->data->len)
|
|
cmd->error = MMC_ERR_FAILED;
|
|
a10_mmc_req_done(sc);
|
|
}
|
|
|
|
static void
|
|
a10_mmc_timeout(void *arg)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = (struct a10_mmc_softc *)arg;
|
|
if (sc->a10_req != NULL) {
|
|
device_printf(sc->a10_dev, "controller timeout\n");
|
|
sc->a10_req->cmd->error = MMC_ERR_TIMEOUT;
|
|
a10_mmc_req_done(sc);
|
|
} else
|
|
device_printf(sc->a10_dev,
|
|
"Spurious timeout - no active request\n");
|
|
}
|
|
|
|
static void
|
|
a10_mmc_intr(void *arg)
|
|
{
|
|
bus_dmasync_op_t sync_op;
|
|
struct a10_mmc_softc *sc;
|
|
struct mmc_data *data;
|
|
uint32_t idst, imask, rint;
|
|
|
|
sc = (struct a10_mmc_softc *)arg;
|
|
A10_MMC_LOCK(sc);
|
|
rint = A10_MMC_READ_4(sc, A10_MMC_RISR);
|
|
idst = A10_MMC_READ_4(sc, A10_MMC_IDST);
|
|
imask = A10_MMC_READ_4(sc, A10_MMC_IMKR);
|
|
if (idst == 0 && imask == 0 && rint == 0) {
|
|
A10_MMC_UNLOCK(sc);
|
|
return;
|
|
}
|
|
#ifdef DEBUG
|
|
device_printf(sc->a10_dev, "idst: %#x, imask: %#x, rint: %#x\n",
|
|
idst, imask, rint);
|
|
#endif
|
|
if (sc->a10_req == NULL) {
|
|
device_printf(sc->a10_dev,
|
|
"Spurious interrupt - no active request, rint: 0x%08X\n",
|
|
rint);
|
|
goto end;
|
|
}
|
|
if (rint & A10_MMC_INT_ERR_BIT) {
|
|
device_printf(sc->a10_dev, "error rint: 0x%08X\n", rint);
|
|
if (rint & A10_MMC_INT_RESP_TIMEOUT)
|
|
sc->a10_req->cmd->error = MMC_ERR_TIMEOUT;
|
|
else
|
|
sc->a10_req->cmd->error = MMC_ERR_FAILED;
|
|
a10_mmc_req_done(sc);
|
|
goto end;
|
|
}
|
|
if (idst & A10_MMC_IDST_ERROR) {
|
|
device_printf(sc->a10_dev, "error idst: 0x%08x\n", idst);
|
|
sc->a10_req->cmd->error = MMC_ERR_FAILED;
|
|
a10_mmc_req_done(sc);
|
|
goto end;
|
|
}
|
|
|
|
sc->a10_intr |= rint;
|
|
data = sc->a10_req->cmd->data;
|
|
if (data != NULL && (idst & A10_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->a10_dma_buf_tag, sc->a10_dma_buf_map,
|
|
sync_op);
|
|
bus_dmamap_sync(sc->a10_dma_tag, sc->a10_dma_map,
|
|
BUS_DMASYNC_POSTWRITE);
|
|
bus_dmamap_unload(sc->a10_dma_buf_tag, sc->a10_dma_buf_map);
|
|
sc->a10_resid = data->len >> 2;
|
|
}
|
|
if ((sc->a10_intr & sc->a10_intr_wait) == sc->a10_intr_wait)
|
|
a10_mmc_req_ok(sc);
|
|
|
|
end:
|
|
A10_MMC_WRITE_4(sc, A10_MMC_IDST, idst);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_RISR, rint);
|
|
A10_MMC_UNLOCK(sc);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_request(device_t bus, device_t child, struct mmc_request *req)
|
|
{
|
|
int blksz;
|
|
struct a10_mmc_softc *sc;
|
|
struct mmc_command *cmd;
|
|
uint32_t cmdreg;
|
|
int err;
|
|
|
|
sc = device_get_softc(bus);
|
|
A10_MMC_LOCK(sc);
|
|
if (sc->a10_req) {
|
|
A10_MMC_UNLOCK(sc);
|
|
return (EBUSY);
|
|
}
|
|
sc->a10_req = req;
|
|
cmd = req->cmd;
|
|
cmdreg = A10_MMC_CMDR_LOAD;
|
|
if (cmd->opcode == MMC_GO_IDLE_STATE)
|
|
cmdreg |= A10_MMC_CMDR_SEND_INIT_SEQ;
|
|
if (cmd->flags & MMC_RSP_PRESENT)
|
|
cmdreg |= A10_MMC_CMDR_RESP_RCV;
|
|
if (cmd->flags & MMC_RSP_136)
|
|
cmdreg |= A10_MMC_CMDR_LONG_RESP;
|
|
if (cmd->flags & MMC_RSP_CRC)
|
|
cmdreg |= A10_MMC_CMDR_CHK_RESP_CRC;
|
|
|
|
sc->a10_intr = 0;
|
|
sc->a10_resid = 0;
|
|
sc->a10_intr_wait = A10_MMC_INT_CMD_DONE;
|
|
cmd->error = MMC_ERR_NONE;
|
|
if (cmd->data != NULL) {
|
|
sc->a10_intr_wait |= A10_MMC_INT_DATA_OVER;
|
|
cmdreg |= A10_MMC_CMDR_DATA_TRANS | A10_MMC_CMDR_WAIT_PRE_OVER;
|
|
if (cmd->data->flags & MMC_DATA_MULTI) {
|
|
cmdreg |= A10_MMC_CMDR_STOP_CMD_FLAG;
|
|
sc->a10_intr_wait |= A10_MMC_INT_AUTO_STOP_DONE;
|
|
}
|
|
if (cmd->data->flags & MMC_DATA_WRITE)
|
|
cmdreg |= A10_MMC_CMDR_DIR_WRITE;
|
|
blksz = min(cmd->data->len, MMC_SECTOR_SIZE);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_BKSR, blksz);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_BYCR, cmd->data->len);
|
|
|
|
err = a10_mmc_prepare_dma(sc);
|
|
if (err != 0)
|
|
device_printf(sc->a10_dev, "prepare_dma failed: %d\n", err);
|
|
}
|
|
|
|
A10_MMC_WRITE_4(sc, A10_MMC_CAGR, cmd->arg);
|
|
A10_MMC_WRITE_4(sc, A10_MMC_CMDR, cmdreg | cmd->opcode);
|
|
callout_reset(&sc->a10_timeoutc, sc->a10_timeout * hz,
|
|
a10_mmc_timeout, sc);
|
|
A10_MMC_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_read_ivar(device_t bus, device_t child, int which,
|
|
uintptr_t *result)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = device_get_softc(bus);
|
|
switch (which) {
|
|
default:
|
|
return (EINVAL);
|
|
case MMCBR_IVAR_BUS_MODE:
|
|
*(int *)result = sc->a10_host.ios.bus_mode;
|
|
break;
|
|
case MMCBR_IVAR_BUS_WIDTH:
|
|
*(int *)result = sc->a10_host.ios.bus_width;
|
|
break;
|
|
case MMCBR_IVAR_CHIP_SELECT:
|
|
*(int *)result = sc->a10_host.ios.chip_select;
|
|
break;
|
|
case MMCBR_IVAR_CLOCK:
|
|
*(int *)result = sc->a10_host.ios.clock;
|
|
break;
|
|
case MMCBR_IVAR_F_MIN:
|
|
*(int *)result = sc->a10_host.f_min;
|
|
break;
|
|
case MMCBR_IVAR_F_MAX:
|
|
*(int *)result = sc->a10_host.f_max;
|
|
break;
|
|
case MMCBR_IVAR_HOST_OCR:
|
|
*(int *)result = sc->a10_host.host_ocr;
|
|
break;
|
|
case MMCBR_IVAR_MODE:
|
|
*(int *)result = sc->a10_host.mode;
|
|
break;
|
|
case MMCBR_IVAR_OCR:
|
|
*(int *)result = sc->a10_host.ocr;
|
|
break;
|
|
case MMCBR_IVAR_POWER_MODE:
|
|
*(int *)result = sc->a10_host.ios.power_mode;
|
|
break;
|
|
case MMCBR_IVAR_VDD:
|
|
*(int *)result = sc->a10_host.ios.vdd;
|
|
break;
|
|
case MMCBR_IVAR_CAPS:
|
|
*(int *)result = sc->a10_host.caps;
|
|
break;
|
|
case MMCBR_IVAR_MAX_DATA:
|
|
*(int *)result = 65535;
|
|
break;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_write_ivar(device_t bus, device_t child, int which,
|
|
uintptr_t value)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = device_get_softc(bus);
|
|
switch (which) {
|
|
default:
|
|
return (EINVAL);
|
|
case MMCBR_IVAR_BUS_MODE:
|
|
sc->a10_host.ios.bus_mode = value;
|
|
break;
|
|
case MMCBR_IVAR_BUS_WIDTH:
|
|
sc->a10_host.ios.bus_width = value;
|
|
break;
|
|
case MMCBR_IVAR_CHIP_SELECT:
|
|
sc->a10_host.ios.chip_select = value;
|
|
break;
|
|
case MMCBR_IVAR_CLOCK:
|
|
sc->a10_host.ios.clock = value;
|
|
break;
|
|
case MMCBR_IVAR_MODE:
|
|
sc->a10_host.mode = value;
|
|
break;
|
|
case MMCBR_IVAR_OCR:
|
|
sc->a10_host.ocr = value;
|
|
break;
|
|
case MMCBR_IVAR_POWER_MODE:
|
|
sc->a10_host.ios.power_mode = value;
|
|
break;
|
|
case MMCBR_IVAR_VDD:
|
|
sc->a10_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
|
|
a10_mmc_update_clock(struct a10_mmc_softc *sc, uint32_t clkon)
|
|
{
|
|
uint32_t cmdreg;
|
|
int retry;
|
|
uint32_t ckcr;
|
|
|
|
ckcr = A10_MMC_READ_4(sc, A10_MMC_CKCR);
|
|
ckcr &= ~(A10_MMC_CKCR_CCLK_ENB | A10_MMC_CKCR_CCLK_CTRL);
|
|
|
|
if (clkon)
|
|
ckcr |= A10_MMC_CKCR_CCLK_ENB;
|
|
|
|
A10_MMC_WRITE_4(sc, A10_MMC_CKCR, ckcr);
|
|
|
|
cmdreg = A10_MMC_CMDR_LOAD | A10_MMC_CMDR_PRG_CLK |
|
|
A10_MMC_CMDR_WAIT_PRE_OVER;
|
|
A10_MMC_WRITE_4(sc, A10_MMC_CMDR, cmdreg);
|
|
retry = 0xfffff;
|
|
while (--retry > 0) {
|
|
if ((A10_MMC_READ_4(sc, A10_MMC_CMDR) & A10_MMC_CMDR_LOAD) == 0) {
|
|
A10_MMC_WRITE_4(sc, A10_MMC_RISR, 0xffffffff);
|
|
return (0);
|
|
}
|
|
DELAY(10);
|
|
}
|
|
A10_MMC_WRITE_4(sc, A10_MMC_RISR, 0xffffffff);
|
|
device_printf(sc->a10_dev, "timeout updating clock\n");
|
|
|
|
return (ETIMEDOUT);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_update_ios(device_t bus, device_t child)
|
|
{
|
|
int error;
|
|
struct a10_mmc_softc *sc;
|
|
struct mmc_ios *ios;
|
|
uint32_t ckcr;
|
|
|
|
sc = device_get_softc(bus);
|
|
|
|
ios = &sc->a10_host.ios;
|
|
|
|
/* Set the bus width. */
|
|
switch (ios->bus_width) {
|
|
case bus_width_1:
|
|
A10_MMC_WRITE_4(sc, A10_MMC_BWDR, A10_MMC_BWDR1);
|
|
break;
|
|
case bus_width_4:
|
|
A10_MMC_WRITE_4(sc, A10_MMC_BWDR, A10_MMC_BWDR4);
|
|
break;
|
|
case bus_width_8:
|
|
A10_MMC_WRITE_4(sc, A10_MMC_BWDR, A10_MMC_BWDR8);
|
|
break;
|
|
}
|
|
|
|
if (ios->clock) {
|
|
|
|
/* Disable clock */
|
|
error = a10_mmc_update_clock(sc, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/* Reset the divider. */
|
|
ckcr = A10_MMC_READ_4(sc, A10_MMC_CKCR);
|
|
ckcr &= ~A10_MMC_CKCR_CCLK_DIV;
|
|
A10_MMC_WRITE_4(sc, A10_MMC_CKCR, ckcr);
|
|
|
|
/* Set the MMC clock. */
|
|
error = clk_set_freq(sc->a10_clk_mmc, ios->clock,
|
|
CLK_SET_ROUND_DOWN);
|
|
if (error != 0) {
|
|
device_printf(sc->a10_dev,
|
|
"failed to set frequency to %u Hz: %d\n",
|
|
ios->clock, error);
|
|
return (error);
|
|
}
|
|
|
|
/* Enable clock. */
|
|
error = a10_mmc_update_clock(sc, 1);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_get_ro(device_t bus, device_t child)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_acquire_host(device_t bus, device_t child)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
int error;
|
|
|
|
sc = device_get_softc(bus);
|
|
A10_MMC_LOCK(sc);
|
|
while (sc->a10_bus_busy) {
|
|
error = msleep(sc, &sc->a10_mtx, PCATCH, "mmchw", 0);
|
|
if (error != 0) {
|
|
A10_MMC_UNLOCK(sc);
|
|
return (error);
|
|
}
|
|
}
|
|
sc->a10_bus_busy++;
|
|
A10_MMC_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
a10_mmc_release_host(device_t bus, device_t child)
|
|
{
|
|
struct a10_mmc_softc *sc;
|
|
|
|
sc = device_get_softc(bus);
|
|
A10_MMC_LOCK(sc);
|
|
sc->a10_bus_busy--;
|
|
wakeup(sc);
|
|
A10_MMC_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t a10_mmc_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, a10_mmc_probe),
|
|
DEVMETHOD(device_attach, a10_mmc_attach),
|
|
DEVMETHOD(device_detach, a10_mmc_detach),
|
|
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_read_ivar, a10_mmc_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, a10_mmc_write_ivar),
|
|
DEVMETHOD(bus_print_child, bus_generic_print_child),
|
|
|
|
/* MMC bridge interface */
|
|
DEVMETHOD(mmcbr_update_ios, a10_mmc_update_ios),
|
|
DEVMETHOD(mmcbr_request, a10_mmc_request),
|
|
DEVMETHOD(mmcbr_get_ro, a10_mmc_get_ro),
|
|
DEVMETHOD(mmcbr_acquire_host, a10_mmc_acquire_host),
|
|
DEVMETHOD(mmcbr_release_host, a10_mmc_release_host),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static devclass_t a10_mmc_devclass;
|
|
|
|
static driver_t a10_mmc_driver = {
|
|
"a10_mmc",
|
|
a10_mmc_methods,
|
|
sizeof(struct a10_mmc_softc),
|
|
};
|
|
|
|
DRIVER_MODULE(a10_mmc, simplebus, a10_mmc_driver, a10_mmc_devclass, 0, 0);
|
|
DRIVER_MODULE(mmc, a10_mmc, mmc_driver, mmc_devclass, NULL, NULL);
|
|
MODULE_DEPEND(a10_mmc, mmc, 1, 1, 1);
|