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freebsd-nq/sys/arm/broadcom/bcm2835/bcm2835_sdhost.c
Bjoern A. Zeeb 8c9ca28b31 A bit of code hygiene (no functional changes). 
Hide unused code under #ifdef notyet (in one case the only caller is under
that same ifdef), or if it is arm (not arm64) specific code under the
__arm__ ifdef to not yield -Wunused-function warnings during the arm64
kernel compile.

MFC after:	2 weeks
2019-06-10 23:25:40 +00:00

1296 lines
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Klaus P. Ohrhallinger <k@7he.at>
* All rights reserved.
*
* Based on bcm2835_sdhci.c:
* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* pin 48-53 - card slot
* pin 34-39 - radio module
*
* alt-0 - rubbish SDHCI (0x7e202000) aka sdhost
* alt-3 - advanced SDHCI (0x7e300000) aka sdhci/mmc/sdio
*
* driving card slot with mmc:
*
* sdhost_pins {
* brcm,pins = <0x30 0x31 0x32 0x33 0x34 0x35>;
* brcm,function = <0x7>;
* brcm,pull = <0x0 0x2 0x2 0x2 0x2 0x2>;
* phandle = <0x17>;
* };
* sdio_pins {
* brcm,pins = <0x22 0x23 0x24 0x25 0x26 0x27>;
* brcm,function = <0x4>;
* brcm,pull = <0x0 0x2 0x2 0x2 0x2 0x2>;
* phandle = <0x18>;
* };
*
* driving card slot with sdhost:
*
* sdhost_pins {
* brcm,pins = <0x30 0x31 0x32 0x33 0x34 0x35>;
* brcm,function = <0x4>;
* brcm,pull = <0x0 0x2 0x2 0x2 0x2 0x2>;
* phandle = <0x17>;
* };
* sdio_pins {
* brcm,pins = <0x22 0x23 0x24 0x25 0x26 0x27>;
* brcm,function = <0x7>;
* brcm,pull = <0x0 0x2 0x2 0x2 0x2 0x2>;
* phandle = <0x18>;
* };
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kobj.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/rman.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/gpio.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/sdhci/sdhci.h>
#include "mmcbr_if.h"
#include "sdhci_if.h"
#include "opt_mmccam.h"
#include "bcm2835_dma.h"
#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
#include "bcm2835_vcbus.h"
/* #define SDHOST_DEBUG */
/* Registers */
#define HC_COMMAND 0x00 /* Command and flags */
#define HC_ARGUMENT 0x04
#define HC_TIMEOUTCOUNTER 0x08
#define HC_CLOCKDIVISOR 0x0c
#define HC_RESPONSE_0 0x10
#define HC_RESPONSE_1 0x14
#define HC_RESPONSE_2 0x18
#define HC_RESPONSE_3 0x1c
#define HC_HOSTSTATUS 0x20
#define HC_POWER 0x30
#define HC_DEBUG 0x34
#define HC_HOSTCONFIG 0x38
#define HC_BLOCKSIZE 0x3c
#define HC_DATAPORT 0x40
#define HC_BLOCKCOUNT 0x50
/* Flags for HC_COMMAND register */
#define HC_CMD_ENABLE 0x8000
#define HC_CMD_FAILED 0x4000
#define HC_CMD_BUSY 0x0800
#define HC_CMD_RESPONSE_NONE 0x0400
#define HC_CMD_RESPONSE_LONG 0x0200
#define HC_CMD_WRITE 0x0080
#define HC_CMD_READ 0x0040
#define HC_CMD_COMMAND_MASK 0x003f
#define HC_CLOCKDIVISOR_MAXVAL 0x07ff
/* Flags for HC_HOSTSTATUS register */
#define HC_HSTST_HAVEDATA 0x0001
#define HC_HSTST_ERROR_FIFO 0x0008
#define HC_HSTST_ERROR_CRC7 0x0010
#define HC_HSTST_ERROR_CRC16 0x0020
#define HC_HSTST_TIMEOUT_CMD 0x0040
#define HC_HSTST_TIMEOUT_DATA 0x0080
#define HC_HSTST_INT_BLOCK 0x0200
#define HC_HSTST_INT_BUSY 0x0400
#define HC_HSTST_RESET 0xffff
#define HC_HSTST_MASK_ERROR_DATA (HC_HSTST_ERROR_FIFO | \
HC_HSTST_ERROR_CRC7 | HC_HSTST_ERROR_CRC16 | HC_HSTST_TIMEOUT_DATA)
#define HC_HSTST_MASK_ERROR_ALL (HC_HSTST_MASK_ERROR_DATA | \
HC_HSTST_TIMEOUT_CMD)
/* Flags for HC_HOSTCONFIG register */
#define HC_HSTCF_INTBUS_WIDE 0x0002
#define HC_HSTCF_EXTBUS_4BIT 0x0004
#define HC_HSTCF_SLOW_CARD 0x0008
#define HC_HSTCF_INT_DATA 0x0010
#define HC_HSTCF_INT_BLOCK 0x0100
#define HC_HSTCF_INT_BUSY 0x0400
/* Flags for HC_DEBUG register */
#define HC_DBG_FIFO_THRESH_WRITE_SHIFT 9
#define HC_DBG_FIFO_THRESH_READ_SHIFT 14
#define HC_DBG_FIFO_THRESH_MASK 0x001f
/* Settings */
#define HC_FIFO_SIZE 16
#define HC_FIFO_THRESH_READ 4
#define HC_FIFO_THRESH_WRITE 4
#define HC_TIMEOUT_DEFAULT 0x00f00000
#define BCM2835_DEFAULT_SDHCI_FREQ 50
static int bcm2835_sdhost_debug = 0;
#ifdef SDHOST_DEBUG
TUNABLE_INT("hw.bcm2835.sdhost.debug", &bcm2835_sdhost_debug);
SYSCTL_INT(_hw_sdhci, OID_AUTO, bcm2835_sdhost_debug, CTLFLAG_RWTUN,
&bcm2835_sdhost_debug, 0, "bcm2835-sdhost Debug level");
#define dprintf(fmt, args...) \
do { \
if (bcm2835_sdhost_debug > 0) \
printf(fmt,##args); \
} while (0)
#else
#define dprintf(fmt, args...)
#endif /* ! SDHOST_DEBUG */
static struct ofw_compat_data compat_data[] = {
{"brcm,bcm2835-sdhost", 1},
{NULL, 0}
};
struct bcm_sdhost_softc {
device_t sc_dev;
struct resource * sc_mem_res;
struct resource * sc_irq_res;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
void * sc_intrhand;
struct mmc_request * sc_req;
struct sdhci_slot sc_slot;
struct mtx mtx;
char cmdbusy;
char mmc_app_cmd;
u_int32_t sdhci_int_status;
u_int32_t sdhci_signal_enable;
u_int32_t sdhci_present_state;
u_int32_t sdhci_blocksize;
u_int32_t sdhci_blockcount;
u_int32_t sdcard_rca;
};
static int bcm_sdhost_probe(device_t);
static int bcm_sdhost_attach(device_t);
static int bcm_sdhost_detach(device_t);
static void bcm_sdhost_intr(void *);
static int bcm_sdhost_get_ro(device_t, device_t);
static inline uint32_t
RD4(struct bcm_sdhost_softc *sc, bus_size_t off)
{
uint32_t val;
val = bus_space_read_4(sc->sc_bst, sc->sc_bsh, off);
return (val);
}
static inline void
WR4(struct bcm_sdhost_softc *sc, bus_size_t off, uint32_t val)
{
bus_space_write_4(sc->sc_bst, sc->sc_bsh, off, val);
}
#ifdef notyet
static inline uint16_t
RD2(struct bcm_sdhost_softc *sc, bus_size_t off)
{
uint32_t val;
val = RD4(sc, off & ~3);
return ((val >> (off & 3)*8) & 0xffff);
}
#endif
static inline uint8_t
RD1(struct bcm_sdhost_softc *sc, bus_size_t off)
{
uint32_t val;
val = RD4(sc, off & ~3);
return ((val >> (off & 3)*8) & 0xff);
}
static inline void
WR2(struct bcm_sdhost_softc *sc, bus_size_t off, uint16_t val)
{
uint32_t val32;
val32 = RD4(sc, off & ~3);
val32 &= ~(0xffff << (off & 3)*8);
val32 |= (val << (off & 3)*8);
WR4(sc, off & ~3, val32);
}
static inline void
WR1(struct bcm_sdhost_softc *sc, bus_size_t off, uint8_t val)
{
uint32_t val32;
val32 = RD4(sc, off & ~3);
val32 &= ~(0xff << (off & 3)*8);
val32 |= (val << (off & 3)*8);
WR4(sc, off & ~3, val32);
}
static void
bcm_sdhost_print_regs(struct bcm_sdhost_softc *sc, struct sdhci_slot *slot,
int line, int error)
{
if (bcm2835_sdhost_debug > 0 || error > 0) {
printf("%s: sc=%p slot=%p\n",
__func__, sc, slot);
printf("HC_COMMAND: 0x%08x\n",
RD4(sc, HC_COMMAND));
printf("HC_ARGUMENT: 0x%08x\n",
RD4(sc, HC_ARGUMENT));
printf("HC_TIMEOUTCOUNTER: 0x%08x\n",
RD4(sc, HC_TIMEOUTCOUNTER));
printf("HC_CLOCKDIVISOR: 0x%08x\n",
RD4(sc, HC_CLOCKDIVISOR));
printf("HC_RESPONSE_0: 0x%08x\n",
RD4(sc, HC_RESPONSE_0));
printf("HC_RESPONSE_1: 0x%08x\n",
RD4(sc, HC_RESPONSE_1));
printf("HC_RESPONSE_2: 0x%08x\n",
RD4(sc, HC_RESPONSE_2));
printf("HC_RESPONSE_3: 0x%08x\n",
RD4(sc, HC_RESPONSE_3));
printf("HC_HOSTSTATUS: 0x%08x\n",
RD4(sc, HC_HOSTSTATUS));
printf("HC_POWER: 0x%08x\n",
RD4(sc, HC_POWER));
printf("HC_DEBUG: 0x%08x\n",
RD4(sc, HC_DEBUG));
printf("HC_HOSTCONFIG: 0x%08x\n",
RD4(sc, HC_HOSTCONFIG));
printf("HC_BLOCKSIZE: 0x%08x\n",
RD4(sc, HC_BLOCKSIZE));
printf("HC_BLOCKCOUNT: 0x%08x\n",
RD4(sc, HC_BLOCKCOUNT));
} else {
/*
printf("%04d | HC_COMMAND: 0x%08x HC_ARGUMENT: 0x%08x "
"HC_HOSTSTATUS: 0x%08x HC_HOSTCONFIG: 0x%08x\n",
line, RD4(sc, HC_COMMAND), RD4(sc, HC_ARGUMENT),
RD4(sc, HC_HOSTSTATUS), RD4(sc, HC_HOSTCONFIG));
*/
}
}
static void
bcm_sdhost_reset(device_t dev, struct sdhci_slot *slot)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
u_int32_t dbg;
WR4(sc, HC_POWER, 0);
WR4(sc, HC_COMMAND, 0);
WR4(sc, HC_ARGUMENT, 0);
WR4(sc, HC_TIMEOUTCOUNTER, HC_TIMEOUT_DEFAULT);
WR4(sc, HC_CLOCKDIVISOR, 0);
WR4(sc, HC_HOSTSTATUS, HC_HSTST_RESET);
WR4(sc, HC_HOSTCONFIG, 0);
WR4(sc, HC_BLOCKSIZE, 0);
WR4(sc, HC_BLOCKCOUNT, 0);
dbg = RD4(sc, HC_DEBUG);
dbg &= ~( (HC_DBG_FIFO_THRESH_MASK << HC_DBG_FIFO_THRESH_READ_SHIFT) |
(HC_DBG_FIFO_THRESH_MASK << HC_DBG_FIFO_THRESH_WRITE_SHIFT) );
dbg |= (HC_FIFO_THRESH_READ << HC_DBG_FIFO_THRESH_READ_SHIFT) |
(HC_FIFO_THRESH_WRITE << HC_DBG_FIFO_THRESH_WRITE_SHIFT);
WR4(sc, HC_DEBUG, dbg);
DELAY(250000);
WR4(sc, HC_POWER, 1);
DELAY(250000);
sc->sdhci_present_state = SDHCI_CARD_PRESENT | SDHCI_CARD_STABLE |
SDHCI_WRITE_PROTECT;
WR4(sc, HC_CLOCKDIVISOR, HC_CLOCKDIVISOR_MAXVAL);
WR4(sc, HC_HOSTCONFIG, HC_HSTCF_INT_BUSY);
}
static int
bcm_sdhost_probe(device_t dev)
{
dprintf("%s:\n", __func__);
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, "Broadcom 2708 SDHOST controller");
return (BUS_PROBE_DEFAULT);
}
static int
bcm_sdhost_attach(device_t dev)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
int rid, err;
u_int default_freq;
dprintf("%s: dev=%p sc=%p unit=%d\n",
__func__, dev, sc, device_get_unit(dev));
mtx_init(&sc->mtx, "BCM SDHOST mtx", "bcm_sdhost",
MTX_DEF | MTX_RECURSE);
sc->sc_dev = dev;
sc->sc_req = NULL;
sc->cmdbusy = 0;
sc->mmc_app_cmd = 0;
sc->sdhci_int_status = 0;
sc->sdhci_signal_enable = 0;
sc->sdhci_present_state = 0;
sc->sdhci_blocksize = 0;
sc->sdhci_blockcount = 0;
sc->sdcard_rca = 0;
default_freq = 50;
err = 0;
if (bootverbose)
device_printf(dev, "SDHCI frequency: %dMHz\n", default_freq);
rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->sc_mem_res) {
device_printf(dev, "cannot allocate memory window\n");
err = ENXIO;
goto fail;
}
sc->sc_bst = rman_get_bustag(sc->sc_mem_res);
sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res);
bcm_sdhost_reset(dev, &sc->sc_slot);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 0);
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (!sc->sc_irq_res) {
device_printf(dev, "cannot allocate interrupt\n");
err = ENXIO;
goto fail;
}
if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, bcm_sdhost_intr, sc, &sc->sc_intrhand)) {
device_printf(dev, "cannot setup interrupt handler\n");
err = ENXIO;
goto fail;
}
sc->sc_slot.caps = 0;
sc->sc_slot.caps |= SDHCI_CAN_VDD_330;
sc->sc_slot.caps |= SDHCI_CAN_DO_HISPD;
sc->sc_slot.caps |= (default_freq << SDHCI_CLOCK_BASE_SHIFT);
sc->sc_slot.quirks = 0;
sc->sc_slot.quirks |= SDHCI_QUIRK_MISSING_CAPS;
sc->sc_slot.quirks |= SDHCI_QUIRK_DONT_SHIFT_RESPONSE;
sc->sc_slot.opt = 0;
/* XXX ?
sc->slot->timeout_clk = ...;
*/
sdhci_init_slot(dev, &sc->sc_slot, 0);
bus_generic_probe(dev);
bus_generic_attach(dev);
sdhci_start_slot(&sc->sc_slot);
return (0);
fail:
if (sc->sc_intrhand)
bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intrhand);
if (sc->sc_irq_res)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
if (sc->sc_mem_res)
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
return (err);
}
static int
bcm_sdhost_detach(device_t dev)
{
dprintf("%s:\n", __func__);
return (EBUSY);
}
/*
* rv 0 --> command finished
* rv 1 --> command timed out
*/
static inline int
bcm_sdhost_waitcommand(struct bcm_sdhost_softc *sc)
{
int timeout = 1000;
mtx_assert(&sc->mtx, MA_OWNED);
while ((RD4(sc, HC_COMMAND) & HC_CMD_ENABLE) && --timeout > 0) {
DELAY(100);
}
return ((timeout > 0) ? 0 : 1);
}
static int
bcm_sdhost_waitcommand_status(struct bcm_sdhost_softc *sc)
{
u_int32_t cdst;
int i;
/* wait for card to change status from
* ''prg'' to ''trn''
* card status: sd specs p. 103
*/
i = 0;
do {
DELAY(1000);
WR4(sc, HC_ARGUMENT, sc->sdcard_rca << 16);
WR4(sc, HC_COMMAND,
MMC_SEND_STATUS | HC_CMD_ENABLE);
bcm_sdhost_waitcommand(sc);
cdst = RD4(sc, HC_RESPONSE_0);
dprintf("%s: card status %08x (cs %d)\n",
__func__, cdst, (cdst & 0x0e00) >> 9);
if (i++ > 100) {
printf("%s: giving up, "
"card status %08x (cs %d)\n",
__func__, cdst,
(cdst & 0x0e00) >> 9);
return (1);
break;
}
} while (((cdst & 0x0e00) >> 9) != 4);
return (0);
}
static void
bcm_sdhost_intr(void *arg)
{
struct bcm_sdhost_softc *sc = arg;
struct sdhci_slot *slot = &sc->sc_slot;
uint32_t hstst;
uint32_t cmd;
mtx_lock(&sc->mtx);
hstst = RD4(sc, HC_HOSTSTATUS);
cmd = RD4(sc, HC_COMMAND);
if (hstst & HC_HSTST_HAVEDATA) {
if (cmd & HC_CMD_READ) {
sc->sdhci_present_state |= SDHCI_DATA_AVAILABLE;
sc->sdhci_int_status |= SDHCI_INT_DATA_AVAIL;
} else if (cmd & HC_CMD_WRITE) {
sc->sdhci_present_state |= SDHCI_SPACE_AVAILABLE;
sc->sdhci_int_status |= SDHCI_INT_SPACE_AVAIL;
} else {
panic("%s: hstst & HC_HSTST_HAVEDATA but no "
"HC_CMD_READ or HC_CMD_WRITE: cmd=%0x8 "
"hstst=%08x\n", __func__, cmd, hstst);
}
} else {
sc->sdhci_present_state &=
~(SDHCI_DATA_AVAILABLE|SDHCI_SPACE_AVAILABLE);
sc->sdhci_int_status &=
~(SDHCI_INT_DATA_AVAIL|SDHCI_INT_SPACE_AVAIL);
}
if (hstst & HC_HSTST_MASK_ERROR_ALL) {
printf("%s: ERROR: HC_HOSTSTATUS: %08x\n", __func__, hstst);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
sc->sdhci_int_status |= SDHCI_INT_ERROR;
} else {
sc->sdhci_int_status &= ~SDHCI_INT_ERROR;
}
dprintf("%s: hstst=%08x offset=%08lx sdhci_present_state=%08x "
"sdhci_int_status=%08x\n", __func__, hstst, slot->offset,
sc->sdhci_present_state, sc->sdhci_int_status);
sdhci_generic_intr(&sc->sc_slot);
sc->sdhci_int_status &=
~(SDHCI_INT_ERROR|SDHCI_INT_DATA_AVAIL|SDHCI_INT_DATA_END);
sc->sdhci_present_state &= ~SDHCI_DATA_AVAILABLE;
if ((hstst & HC_HSTST_HAVEDATA) &&
(sc->sdhci_blocksize * sc->sdhci_blockcount == slot->offset)) {
dprintf("%s: offset=%08lx sdhci_blocksize=%08x "
"sdhci_blockcount=%08x\n", __func__, slot->offset,
sc->sdhci_blocksize, sc->sdhci_blockcount);
sc->sdhci_int_status &=
~(SDHCI_INT_DATA_AVAIL|SDHCI_INT_SPACE_AVAIL);
sc->sdhci_int_status |= SDHCI_INT_DATA_END;
sdhci_generic_intr(&sc->sc_slot);
sc->sdhci_int_status &= ~SDHCI_INT_DATA_END;
if ((cmd & HC_CMD_COMMAND_MASK) == MMC_READ_MULTIPLE_BLOCK ||
(cmd & HC_CMD_COMMAND_MASK) == MMC_WRITE_MULTIPLE_BLOCK) {
WR4(sc, HC_ARGUMENT, 0x00000000);
WR4(sc, HC_COMMAND,
MMC_STOP_TRANSMISSION | HC_CMD_ENABLE);
if (bcm_sdhost_waitcommand(sc)) {
printf("%s: timeout #1\n", __func__);
bcm_sdhost_print_regs(sc, &sc->sc_slot,
__LINE__, 1);
}
}
if (cmd & HC_CMD_WRITE) {
if (bcm_sdhost_waitcommand_status(sc) != 0)
sc->sdhci_int_status |= SDHCI_INT_ERROR;
}
slot->data_done = 1;
sc->sdhci_int_status |= SDHCI_INT_RESPONSE;
sdhci_generic_intr(&sc->sc_slot);
sc->sdhci_int_status &= ~(SDHCI_INT_RESPONSE|SDHCI_INT_ERROR);
}
/* this resets the interrupt */
WR4(sc, HC_HOSTSTATUS,
(HC_HSTST_INT_BUSY|HC_HSTST_INT_BLOCK|HC_HSTST_HAVEDATA));
mtx_unlock(&sc->mtx);
}
static int
bcm_sdhost_get_ro(device_t bus, device_t child)
{
dprintf("%s:\n", __func__);
return (0);
}
static bool
bcm_sdhost_get_card_present(device_t dev, struct sdhci_slot *slot)
{
dprintf("%s:\n", __func__);
return (1);
}
static void
bcm_sdhost_command(device_t dev, struct sdhci_slot *slot, uint16_t val)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
struct mmc_data *data = slot->curcmd->data;
uint16_t val2;
uint8_t opcode;
uint8_t flags;
mtx_assert(&sc->mtx, MA_OWNED);
if (RD4(sc, HC_COMMAND) & HC_CMD_ENABLE) {
panic("%s: HC_CMD_ENABLE on entry\n", __func__);
}
if (sc->cmdbusy == 1)
panic("%s: cmdbusy\n", __func__);
sc->cmdbusy = 1;
val2 = ((val >> 8) & HC_CMD_COMMAND_MASK) | HC_CMD_ENABLE;
opcode = val >> 8;
flags = val & 0xff;
if (opcode == MMC_APP_CMD)
sc->mmc_app_cmd = 1;
if ((flags & SDHCI_CMD_RESP_MASK) == SDHCI_CMD_RESP_LONG)
val2 |= HC_CMD_RESPONSE_LONG;
else if ((flags & SDHCI_CMD_RESP_MASK) == SDHCI_CMD_RESP_SHORT_BUSY)
/* XXX XXX when enabled, cmd 7 (select card) blocks forever */
;/*val2 |= HC_CMD_BUSY; */
else if ((flags & SDHCI_CMD_RESP_MASK) == SDHCI_CMD_RESP_SHORT)
;
else
val2 |= HC_CMD_RESPONSE_NONE;
if (val2 & HC_CMD_BUSY)
sc->sdhci_present_state |=
SDHCI_CMD_INHIBIT | SDHCI_DAT_INHIBIT;
if (data != NULL && data->flags & MMC_DATA_READ)
val2 |= HC_CMD_READ;
else if (data != NULL && data->flags & MMC_DATA_WRITE)
val2 |= HC_CMD_WRITE;
dprintf("%s: SDHCI_COMMAND_FLAGS --> HC_COMMAND %04x --> %04x\n",
__func__, val, val2);
if (opcode == MMC_READ_MULTIPLE_BLOCK ||
opcode == MMC_WRITE_MULTIPLE_BLOCK) {
u_int32_t save_sdarg;
dprintf("%s: issuing MMC_SET_BLOCK_COUNT: CMD %08x ARG %08x\n",
__func__, MMC_SET_BLOCK_COUNT | HC_CMD_ENABLE,
sc->sdhci_blockcount);
save_sdarg = RD4(sc, HC_ARGUMENT);
WR4(sc, HC_ARGUMENT, sc->sdhci_blockcount);
WR4(sc, HC_COMMAND, MMC_SET_BLOCK_COUNT | HC_CMD_ENABLE);
/* Seems to always return timeout */
if (bcm_sdhost_waitcommand(sc)) {
printf("%s: timeout #2\n", __func__);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
} else {
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 0);
}
WR4(sc, HC_ARGUMENT, save_sdarg);
} else if (opcode == MMC_SELECT_CARD) {
sc->sdcard_rca = (RD4(sc, HC_ARGUMENT) >> 16);
}
/* actually issuing the command */
WR4(sc, HC_COMMAND, val2);
if (val2 & HC_CMD_READ || val2 & HC_CMD_WRITE) {
u_int8_t hstcfg;
hstcfg = RD4(sc, HC_HOSTCONFIG);
hstcfg |= (HC_HSTCF_INT_BUSY | HC_HSTCF_INT_DATA);
WR4(sc, HC_HOSTCONFIG, hstcfg);
slot->data_done = 0;
if (bcm_sdhost_waitcommand(sc)) {
printf("%s: timeout #3\n", __func__);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
}
} else if (opcode == MMC_ERASE) {
if (bcm_sdhost_waitcommand_status(sc) != 0) {
printf("%s: timeout #4\n", __func__);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
}
slot->data_done = 1;
sc->sdhci_present_state &=
~(SDHCI_CMD_INHIBIT | SDHCI_DAT_INHIBIT);
} else {
if (bcm_sdhost_waitcommand(sc)) {
printf("%s: timeout #5\n", __func__);
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
}
slot->data_done = 1;
sc->sdhci_present_state &=
~(SDHCI_CMD_INHIBIT | SDHCI_DAT_INHIBIT);
}
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 0);
if (RD4(sc, HC_HOSTSTATUS) & HC_HSTST_TIMEOUT_CMD)
slot->curcmd->error = MMC_ERR_TIMEOUT;
else if (RD4(sc, HC_COMMAND) & HC_CMD_FAILED)
slot->curcmd->error = MMC_ERR_FAILED;
dprintf("%s: curcmd->flags=%d data_done=%d\n",
__func__, slot->curcmd->flags, slot->data_done);
if (val2 & HC_CMD_RESPONSE_NONE)
slot->curcmd->error = 0;
if (sc->mmc_app_cmd == 1 && opcode != MMC_APP_CMD)
sc->mmc_app_cmd = 0;
if (RD4(sc, HC_COMMAND) & HC_CMD_ENABLE) {
bcm_sdhost_print_regs(sc, &sc->sc_slot, __LINE__, 1);
panic("%s: still HC_CMD_ENABLE on exit\n", __func__);
}
sc->cmdbusy = 0;
if (!(val2 & HC_CMD_READ || val2 & HC_CMD_WRITE))
sc->sdhci_int_status |= SDHCI_INT_RESPONSE;
/* HACK, so sdhci_finish_command() does not
* have to be exported
*/
mtx_unlock(&slot->mtx);
sdhci_generic_intr(slot);
mtx_lock(&slot->mtx);
sc->sdhci_int_status &= ~SDHCI_INT_RESPONSE;
}
static uint8_t
bcm_sdhost_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint32_t val1, val2;
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_HOST_CONTROL:
val1 = RD4(sc, HC_HOSTCONFIG);
val2 = 0;
if (val1 & HC_HSTCF_EXTBUS_4BIT)
val2 |= SDHCI_CTRL_4BITBUS;
dprintf("%s: SDHCI_HOST_CONTROL --> HC_HOSTCONFIG val2 %02x\n",
__func__, val2);
break;
case SDHCI_POWER_CONTROL:
val1 = RD1(sc, HC_POWER);
val2 = (val1 == 1) ? 0x0f : 0;
dprintf("%s: SDHCI_POWER_CONTROL --> HC_POWER val2 %02x\n",
__func__, val2);
break;
case SDHCI_BLOCK_GAP_CONTROL:
dprintf("%s: SDHCI_BLOCK_GAP_CONTROL\n", __func__);
val2 = 0;
break;
case SDHCI_WAKE_UP_CONTROL:
dprintf("%s: SDHCI_WAKE_UP_CONTROL\n", __func__);
val2 = 0;
break;
case SDHCI_TIMEOUT_CONTROL:
dprintf("%s: SDHCI_TIMEOUT_CONTROL\n", __func__);
val2 = 0;
break;
case SDHCI_SOFTWARE_RESET:
dprintf("%s: SDHCI_SOFTWARE_RESET\n", __func__);
val2 = 0;
break;
case SDHCI_ADMA_ERR:
dprintf("%s: SDHCI_ADMA_ERR\n", __func__);
val2 = 0;
break;
default:
dprintf("%s: UNKNOWN off=%08lx\n", __func__, off);
val2 = 0;
break;
}
mtx_unlock(&sc->mtx);
return (val2);
}
static uint16_t
bcm_sdhost_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint32_t val2, val; /* = RD4(sc, off & ~3); */
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_BLOCK_SIZE:
val2 = sc->sdhci_blocksize;
dprintf("%s: SDHCI_BLOCK_SIZE --> HC_BLOCKSIZE %08x\n",
__func__, val2);
break;
case SDHCI_BLOCK_COUNT:
val2 = sc->sdhci_blockcount;
dprintf("%s: SDHCI_BLOCK_COUNT --> HC_BLOCKCOUNT %08x\n",
__func__, val2);
break;
case SDHCI_TRANSFER_MODE:
dprintf("%s: SDHCI_TRANSFER_MODE\n", __func__);
val2 = 0;
break;
case SDHCI_CLOCK_CONTROL:
val = RD4(sc, HC_CLOCKDIVISOR);
val2 = (val << SDHCI_DIVIDER_SHIFT) |
SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN |
SDHCI_CLOCK_INT_STABLE;
dprintf("%s: SDHCI_CLOCK_CONTROL %04x --> %04x\n",
__func__, val, val2);
break;
case SDHCI_ACMD12_ERR:
dprintf("%s: SDHCI_ACMD12_ERR\n", __func__);
val2 = 0;
break;
case SDHCI_HOST_CONTROL2:
dprintf("%s: SDHCI_HOST_CONTROL2\n", __func__);
val2 = 0;
break;
case SDHCI_SLOT_INT_STATUS:
dprintf("%s: SDHCI_SLOT_INT_STATUS\n", __func__);
val2 = 0;
break;
case SDHCI_HOST_VERSION:
dprintf("%s: SDHCI_HOST_VERSION\n", __func__);
val2 = 0;
break;
default:
dprintf("%s: UNKNOWN off=%08lx\n", __func__, off);
val2 = 0;
break;
}
mtx_unlock(&sc->mtx);
return (val2);
}
static uint32_t
bcm_sdhost_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint32_t val2;
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_DMA_ADDRESS:
dprintf("%s: SDHCI_DMA_ADDRESS\n", __func__);
val2 = 0;
break;
case SDHCI_ARGUMENT:
dprintf("%s: SDHCI_ARGUMENT\n", __func__);
val2 = (RD4(sc, HC_COMMAND) << 16) |
(RD4(sc, HC_ARGUMENT) & 0x0000ffff);
break;
case SDHCI_RESPONSE + 0:
val2 = RD4(sc, HC_RESPONSE_0);
dprintf("%s: SDHCI_RESPONSE+0 %08x\n", __func__, val2);
break;
case SDHCI_RESPONSE + 4:
val2 = RD4(sc, HC_RESPONSE_1);
dprintf("%s: SDHCI_RESPONSE+4 %08x\n", __func__, val2);
break;
case SDHCI_RESPONSE + 8:
val2 = RD4(sc, HC_RESPONSE_2);
dprintf("%s: SDHCI_RESPONSE+8 %08x\n", __func__, val2);
break;
case SDHCI_RESPONSE + 12:
val2 = RD4(sc, HC_RESPONSE_3);
dprintf("%s: SDHCI_RESPONSE+12 %08x\n", __func__, val2);
break;
case SDHCI_BUFFER:
dprintf("%s: SDHCI_BUFFER\n", __func__);
val2 = 0;
break;
case SDHCI_PRESENT_STATE:
dprintf("%s: SDHCI_PRESENT_STATE %08x\n",
__func__, sc->sdhci_present_state);
val2 = sc->sdhci_present_state;
break;
case SDHCI_INT_STATUS:
dprintf("%s: SDHCI_INT_STATUS %08x\n",
__func__, sc->sdhci_int_status);
val2 = sc->sdhci_int_status;
break;
case SDHCI_INT_ENABLE:
dprintf("%s: SDHCI_INT_ENABLE\n", __func__);
val2 = 0;
break;
case SDHCI_SIGNAL_ENABLE:
dprintf("%s: SDHCI_SIGNAL_ENABLE %08x\n",
__func__, sc->sdhci_signal_enable);
val2 = sc->sdhci_signal_enable;
break;
case SDHCI_CAPABILITIES:
val2 = 0;
break;
case SDHCI_CAPABILITIES2:
dprintf("%s: SDHCI_CAPABILITIES2\n", __func__);
val2 = 0;
break;
case SDHCI_MAX_CURRENT:
dprintf("%s: SDHCI_MAX_CURRENT\n", __func__);
val2 = 0;
break;
case SDHCI_ADMA_ADDRESS_LO:
dprintf("%s: SDHCI_ADMA_ADDRESS_LO\n", __func__);
val2 = 0;
break;
default:
dprintf("%s: UNKNOWN off=%08lx\n", __func__, off);
val2 = 0;
break;
}
mtx_unlock(&sc->mtx);
return (val2);
}
static void
bcm_sdhost_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
uint32_t *data, bus_size_t count)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
bus_size_t i;
bus_size_t avail;
uint32_t edm;
mtx_lock(&sc->mtx);
dprintf("%s: off=%08lx count=%08lx\n", __func__, off, count);
for (i = 0; i < count;) {
edm = RD4(sc, HC_DEBUG);
avail = ((edm >> 4) & 0x1f);
if (i + avail > count)
avail = count - i;
if (avail > 0)
bus_space_read_multi_4(sc->sc_bst, sc->sc_bsh,
HC_DATAPORT, data + i, avail);
i += avail;
DELAY(1);
}
mtx_unlock(&sc->mtx);
}
static void
bcm_sdhost_write_1(device_t dev, struct sdhci_slot *slot,
bus_size_t off, uint8_t val)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint32_t val2;
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_HOST_CONTROL:
val2 = RD4(sc, HC_HOSTCONFIG);
val2 |= HC_HSTCF_INT_BUSY;
val2 |= HC_HSTCF_INTBUS_WIDE | HC_HSTCF_SLOW_CARD;
if (val & SDHCI_CTRL_4BITBUS)
val2 |= HC_HSTCF_EXTBUS_4BIT;
dprintf("%s: SDHCI_HOST_CONTROL --> HC_HOSTC %04x --> %04x\n",
__func__, val, val2);
WR4(sc, HC_HOSTCONFIG, val2);
break;
case SDHCI_POWER_CONTROL:
val2 = (val != 0) ? 1 : 0;
dprintf("%s: SDHCI_POWER_CONTROL --> HC_POWER %02x --> %02x\n",
__func__, val, val2);
WR1(sc, HC_POWER, val2);
break;
case SDHCI_BLOCK_GAP_CONTROL:
dprintf("%s: SDHCI_BLOCK_GAP_CONTROL val=%02x\n",
__func__, val);
break;
case SDHCI_TIMEOUT_CONTROL:
dprintf("%s: SDHCI_TIMEOUT_CONTROL val=%02x\n",
__func__, val);
break;
case SDHCI_SOFTWARE_RESET:
dprintf("%s: SDHCI_SOFTWARE_RESET val=%02x\n",
__func__, val);
break;
case SDHCI_ADMA_ERR:
dprintf("%s: SDHCI_ADMA_ERR val=%02x\n",
__func__, val);
break;
default:
dprintf("%s: UNKNOWN off=%08lx val=%08x\n",
__func__, off, val);
break;
}
mtx_unlock(&sc->mtx);
}
static void
bcm_sdhost_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint16_t val)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint16_t val2;
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_BLOCK_SIZE:
dprintf("%s: SDHCI_BLOCK_SIZE val=%04x\n" ,
__func__, val);
sc->sdhci_blocksize = val;
WR2(sc, HC_BLOCKSIZE, val);
break;
case SDHCI_BLOCK_COUNT:
dprintf("%s: SDHCI_BLOCK_COUNT val=%04x\n" ,
__func__, val);
sc->sdhci_blockcount = val;
WR2(sc, HC_BLOCKCOUNT, val);
break;
case SDHCI_TRANSFER_MODE:
dprintf("%s: SDHCI_TRANSFER_MODE val=%04x\n" ,
__func__, val);
break;
case SDHCI_COMMAND_FLAGS:
bcm_sdhost_command(dev, slot, val);
break;
case SDHCI_CLOCK_CONTROL:
val2 = (val & ~SDHCI_DIVIDER_MASK) >> SDHCI_DIVIDER_SHIFT;
/* get crc16 errors with cdiv=0 */
if (val2 == 0)
val2 = 1;
dprintf("%s: SDHCI_CLOCK_CONTROL %04x --> SCDIV %04x\n",
__func__, val, val2);
WR4(sc, HC_CLOCKDIVISOR, val2);
break;
case SDHCI_ACMD12_ERR:
dprintf("%s: SDHCI_ACMD12_ERR val=%04x\n" ,
__func__, val);
break;
case SDHCI_HOST_CONTROL2:
dprintf("%s: SDHCI_HOST_CONTROL2 val=%04x\n" ,
__func__, val);
break;
case SDHCI_SLOT_INT_STATUS:
dprintf("%s: SDHCI_SLOT_INT_STATUS val=%04x\n" ,
__func__, val);
break;
default:
dprintf("%s: UNKNOWN off=%08lx val=%04x\n",
__func__, off, val);
break;
}
mtx_unlock(&sc->mtx);
}
static void
bcm_sdhost_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off, uint32_t val)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
uint32_t val2;
uint32_t hstcfg;
mtx_lock(&sc->mtx);
switch (off) {
case SDHCI_ARGUMENT:
val2 = val;
dprintf("%s: SDHCI_ARGUMENT --> HC_ARGUMENT val=%08x\n",
__func__, val);
WR4(sc, HC_ARGUMENT, val2);
break;
case SDHCI_INT_STATUS:
dprintf("%s: SDHCI_INT_STATUS val=%08x\n",
__func__, val);
sc->sdhci_int_status = val;
break;
case SDHCI_INT_ENABLE:
dprintf("%s: SDHCI_INT_ENABLE val=%08x\n" ,
__func__, val);
break;
case SDHCI_SIGNAL_ENABLE:
sc->sdhci_signal_enable = val;
hstcfg = RD4(sc, HC_HOSTCONFIG);
if (val != 0)
hstcfg &= ~(HC_HSTCF_INT_BLOCK | HC_HSTCF_INT_DATA);
else
hstcfg |= (HC_HSTCF_INT_BUSY|HC_HSTCF_INT_BLOCK|
HC_HSTCF_INT_DATA);
hstcfg |= HC_HSTCF_INT_BUSY;
dprintf("%s: SDHCI_SIGNAL_ENABLE --> HC_HOSTC %08x --> %08x\n" ,
__func__, val, hstcfg);
WR4(sc, HC_HOSTCONFIG, hstcfg);
break;
case SDHCI_CAPABILITIES:
dprintf("%s: SDHCI_CAPABILITIES val=%08x\n",
__func__, val);
break;
case SDHCI_CAPABILITIES2:
dprintf("%s: SDHCI_CAPABILITIES2 val=%08x\n",
__func__, val);
break;
case SDHCI_MAX_CURRENT:
dprintf("%s: SDHCI_MAX_CURRENT val=%08x\n",
__func__, val);
break;
case SDHCI_ADMA_ADDRESS_LO:
dprintf("%s: SDHCI_ADMA_ADDRESS_LO val=%08x\n",
__func__, val);
break;
default:
dprintf("%s: UNKNOWN off=%08lx val=%08x\n",
__func__, off, val);
break;
}
mtx_unlock(&sc->mtx);
}
static void
bcm_sdhost_write_multi_4(device_t dev, struct sdhci_slot *slot,
bus_size_t off, uint32_t *data, bus_size_t count)
{
struct bcm_sdhost_softc *sc = device_get_softc(dev);
bus_size_t i;
bus_size_t space;
uint32_t edm;
mtx_lock(&sc->mtx);
dprintf("%s: off=%08lx count=%02lx\n", __func__, off, count);
for (i = 0; i < count;) {
edm = RD4(sc, HC_DEBUG);
space = HC_FIFO_SIZE - ((edm >> 4) & 0x1f);
if (i + space > count)
space = count - i;
if (space > 0)
bus_space_write_multi_4(sc->sc_bst, sc->sc_bsh,
HC_DATAPORT, data + i, space);
i += space;
DELAY(1);
}
/* wait until FIFO is really empty */
while (((RD4(sc, HC_DEBUG) >> 4) & 0x1f) > 0)
DELAY(1);
mtx_unlock(&sc->mtx);
}
static device_method_t bcm_sdhost_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bcm_sdhost_probe),
DEVMETHOD(device_attach, bcm_sdhost_attach),
DEVMETHOD(device_detach, bcm_sdhost_detach),
/* Bus interface */
DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar),
DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar),
/* MMC bridge interface */
DEVMETHOD(mmcbr_update_ios, sdhci_generic_update_ios),
DEVMETHOD(mmcbr_request, sdhci_generic_request),
DEVMETHOD(mmcbr_get_ro, bcm_sdhost_get_ro),
DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host),
DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host),
/* SDHCI registers accessors */
DEVMETHOD(sdhci_read_1, bcm_sdhost_read_1),
DEVMETHOD(sdhci_read_2, bcm_sdhost_read_2),
DEVMETHOD(sdhci_read_4, bcm_sdhost_read_4),
DEVMETHOD(sdhci_read_multi_4, bcm_sdhost_read_multi_4),
DEVMETHOD(sdhci_write_1, bcm_sdhost_write_1),
DEVMETHOD(sdhci_write_2, bcm_sdhost_write_2),
DEVMETHOD(sdhci_write_4, bcm_sdhost_write_4),
DEVMETHOD(sdhci_write_multi_4, bcm_sdhost_write_multi_4),
DEVMETHOD(sdhci_get_card_present,bcm_sdhost_get_card_present),
DEVMETHOD_END
};
static devclass_t bcm_sdhost_devclass;
static driver_t bcm_sdhost_driver = {
"sdhost_bcm",
bcm_sdhost_methods,
sizeof(struct bcm_sdhost_softc),
};
DRIVER_MODULE(sdhost_bcm, simplebus, bcm_sdhost_driver, bcm_sdhost_devclass,
NULL, NULL);
SDHCI_DEPEND(sdhost_bcm);
#ifndef MMCCAM
MMC_DECLARE_BRIDGE(sdhost_bcm);
#endif
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