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freebsd-dev/sys/dev/sdhci/sdhci.c
Warner Losh a94a63f0a6 An MMC/SD/SDIO stack using CAM 
Implement the MMC/SD/SDIO protocol within a CAM framework. CAM's
flexible queueing will make it easier to write non-storage drivers
than the legacy stack. SDIO drivers from both the kernel and as
userland daemons are possible, though much of that functionality will
come later.

Some of the CAM integration isn't complete (there are sleeps in the
device probe state machine, for example), but those minor issues can
be improved in-tree more easily than out of tree and shouldn't gate
progress on other fronts. Appologies to reviews if specific items
have been overlooked.

Submitted by: Ilya Bakulin
Reviewed by: emaste, imp, mav, adrian, ian
Differential Review: https://reviews.freebsd.org/D4761

merge with first commit, various compile hacks.
2017-07-09 16:57:24 +00:00

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/*-
* Copyright (c) 2008 Alexander Motin <mav@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 ``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 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/callout.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <dev/mmc/bridge.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcbrvar.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include "mmcbr_if.h"
#include "sdhci.h"
#include "sdhci_if.h"
#include "opt_mmccam.h"
SYSCTL_NODE(_hw, OID_AUTO, sdhci, CTLFLAG_RD, 0, "sdhci driver");
static int sdhci_debug = 0;
SYSCTL_INT(_hw_sdhci, OID_AUTO, debug, CTLFLAG_RWTUN, &sdhci_debug, 0,
"Debug level");
u_int sdhci_quirk_clear = 0;
SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_clear, CTLFLAG_RWTUN, &sdhci_quirk_clear,
0, "Mask of quirks to clear");
u_int sdhci_quirk_set = 0;
SYSCTL_INT(_hw_sdhci, OID_AUTO, quirk_set, CTLFLAG_RWTUN, &sdhci_quirk_set, 0,
"Mask of quirks to set");
#define RD1(slot, off) SDHCI_READ_1((slot)->bus, (slot), (off))
#define RD2(slot, off) SDHCI_READ_2((slot)->bus, (slot), (off))
#define RD4(slot, off) SDHCI_READ_4((slot)->bus, (slot), (off))
#define RD_MULTI_4(slot, off, ptr, count) \
SDHCI_READ_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
#define WR1(slot, off, val) SDHCI_WRITE_1((slot)->bus, (slot), (off), (val))
#define WR2(slot, off, val) SDHCI_WRITE_2((slot)->bus, (slot), (off), (val))
#define WR4(slot, off, val) SDHCI_WRITE_4((slot)->bus, (slot), (off), (val))
#define WR_MULTI_4(slot, off, ptr, count) \
SDHCI_WRITE_MULTI_4((slot)->bus, (slot), (off), (ptr), (count))
static void sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock);
static void sdhci_start(struct sdhci_slot *slot);
static void sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data);
static void sdhci_card_poll(void *);
static void sdhci_card_task(void *, int);
/* CAM-related */
int sdhci_cam_get_possible_host_clock(struct sdhci_slot *slot, int proposed_clock);
static int sdhci_cam_update_ios(struct sdhci_slot *slot);
static int sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb);
static void sdhci_cam_action(struct cam_sim *sim, union ccb *ccb);
static void sdhci_cam_poll(struct cam_sim *sim);
static int sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb);
/* helper routines */
static void sdhci_dumpregs(struct sdhci_slot *slot);
static int slot_printf(struct sdhci_slot *slot, const char * fmt, ...)
__printflike(2, 3);
#define SDHCI_LOCK(_slot) mtx_lock(&(_slot)->mtx)
#define SDHCI_UNLOCK(_slot) mtx_unlock(&(_slot)->mtx)
#define SDHCI_LOCK_INIT(_slot) \
mtx_init(&_slot->mtx, "SD slot mtx", "sdhci", MTX_DEF)
#define SDHCI_LOCK_DESTROY(_slot) mtx_destroy(&_slot->mtx);
#define SDHCI_ASSERT_LOCKED(_slot) mtx_assert(&_slot->mtx, MA_OWNED);
#define SDHCI_ASSERT_UNLOCKED(_slot) mtx_assert(&_slot->mtx, MA_NOTOWNED);
#define SDHCI_DEFAULT_MAX_FREQ 50
#define SDHCI_200_MAX_DIVIDER 256
#define SDHCI_300_MAX_DIVIDER 2046
#define SDHCI_CARD_PRESENT_TICKS (hz / 5)
#define SDHCI_INSERT_DELAY_TICKS (hz / 2)
/*
* Broadcom BCM577xx Controller Constants
*/
/* Maximum divider supported by the default clock source. */
#define BCM577XX_DEFAULT_MAX_DIVIDER 256
/* Alternative clock's base frequency. */
#define BCM577XX_ALT_CLOCK_BASE 63000000
#define BCM577XX_HOST_CONTROL 0x198
#define BCM577XX_CTRL_CLKSEL_MASK 0xFFFFCFFF
#define BCM577XX_CTRL_CLKSEL_SHIFT 12
#define BCM577XX_CTRL_CLKSEL_DEFAULT 0x0
#define BCM577XX_CTRL_CLKSEL_64MHZ 0x3
static void
sdhci_getaddr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
if (error != 0) {
printf("getaddr: error %d\n", error);
return;
}
*(bus_addr_t *)arg = segs[0].ds_addr;
}
static int
slot_printf(struct sdhci_slot *slot, const char * fmt, ...)
{
va_list ap;
int retval;
retval = printf("%s-slot%d: ",
device_get_nameunit(slot->bus), slot->num);
va_start(ap, fmt);
retval += vprintf(fmt, ap);
va_end(ap);
return (retval);
}
static void
sdhci_dumpregs(struct sdhci_slot *slot)
{
slot_printf(slot,
"============== REGISTER DUMP ==============\n");
slot_printf(slot, "Sys addr: 0x%08x | Version: 0x%08x\n",
RD4(slot, SDHCI_DMA_ADDRESS), RD2(slot, SDHCI_HOST_VERSION));
slot_printf(slot, "Blk size: 0x%08x | Blk cnt: 0x%08x\n",
RD2(slot, SDHCI_BLOCK_SIZE), RD2(slot, SDHCI_BLOCK_COUNT));
slot_printf(slot, "Argument: 0x%08x | Trn mode: 0x%08x\n",
RD4(slot, SDHCI_ARGUMENT), RD2(slot, SDHCI_TRANSFER_MODE));
slot_printf(slot, "Present: 0x%08x | Host ctl: 0x%08x\n",
RD4(slot, SDHCI_PRESENT_STATE), RD1(slot, SDHCI_HOST_CONTROL));
slot_printf(slot, "Power: 0x%08x | Blk gap: 0x%08x\n",
RD1(slot, SDHCI_POWER_CONTROL), RD1(slot, SDHCI_BLOCK_GAP_CONTROL));
slot_printf(slot, "Wake-up: 0x%08x | Clock: 0x%08x\n",
RD1(slot, SDHCI_WAKE_UP_CONTROL), RD2(slot, SDHCI_CLOCK_CONTROL));
slot_printf(slot, "Timeout: 0x%08x | Int stat: 0x%08x\n",
RD1(slot, SDHCI_TIMEOUT_CONTROL), RD4(slot, SDHCI_INT_STATUS));
slot_printf(slot, "Int enab: 0x%08x | Sig enab: 0x%08x\n",
RD4(slot, SDHCI_INT_ENABLE), RD4(slot, SDHCI_SIGNAL_ENABLE));
slot_printf(slot, "AC12 err: 0x%08x | Host ctl2: 0x%08x\n",
RD2(slot, SDHCI_ACMD12_ERR), RD2(slot, SDHCI_HOST_CONTROL2));
slot_printf(slot, "Caps: 0x%08x | Caps2: 0x%08x\n",
RD4(slot, SDHCI_CAPABILITIES), RD4(slot, SDHCI_CAPABILITIES2));
slot_printf(slot, "Max curr: 0x%08x | ADMA err: 0x%08x\n",
RD4(slot, SDHCI_MAX_CURRENT), RD1(slot, SDHCI_ADMA_ERR));
slot_printf(slot, "ADMA addr: 0x%08x | Slot int: 0x%08x\n",
RD4(slot, SDHCI_ADMA_ADDRESS_LO), RD2(slot, SDHCI_SLOT_INT_STATUS));
slot_printf(slot,
"===========================================\n");
}
static void
sdhci_reset(struct sdhci_slot *slot, uint8_t mask)
{
int timeout;
uint32_t clock;
if (slot->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {
if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot))
return;
}
/* Some controllers need this kick or reset won't work. */
if ((mask & SDHCI_RESET_ALL) == 0 &&
(slot->quirks & SDHCI_QUIRK_CLOCK_BEFORE_RESET)) {
/* This is to force an update */
clock = slot->clock;
slot->clock = 0;
sdhci_set_clock(slot, clock);
}
if (mask & SDHCI_RESET_ALL) {
slot->clock = 0;
slot->power = 0;
}
WR1(slot, SDHCI_SOFTWARE_RESET, mask);
if (slot->quirks & SDHCI_QUIRK_WAITFOR_RESET_ASSERTED) {
/*
* Resets on TI OMAPs and AM335x are incompatible with SDHCI
* specification. The reset bit has internal propagation delay,
* so a fast read after write returns 0 even if reset process is
* in progress. The workaround is to poll for 1 before polling
* for 0. In the worst case, if we miss seeing it asserted the
* time we spent waiting is enough to ensure the reset finishes.
*/
timeout = 10000;
while ((RD1(slot, SDHCI_SOFTWARE_RESET) & mask) != mask) {
if (timeout <= 0)
break;
timeout--;
DELAY(1);
}
}
/* Wait max 100 ms */
timeout = 10000;
/* Controller clears the bits when it's done */
while (RD1(slot, SDHCI_SOFTWARE_RESET) & mask) {
if (timeout <= 0) {
slot_printf(slot, "Reset 0x%x never completed.\n",
mask);
sdhci_dumpregs(slot);
return;
}
timeout--;
DELAY(10);
}
}
static void
sdhci_init(struct sdhci_slot *slot)
{
sdhci_reset(slot, SDHCI_RESET_ALL);
/* Enable interrupts. */
slot->intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE |
SDHCI_INT_ACMD12ERR | SDHCI_INT_CARD_INT;
if (!(slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) &&
!(slot->opt & SDHCI_NON_REMOVABLE)) {
slot->intmask |= SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT;
}
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
static void
sdhci_set_clock(struct sdhci_slot *slot, uint32_t clock)
{
uint32_t clk_base;
uint32_t clk_sel;
uint32_t res;
uint16_t clk;
uint16_t div;
int timeout;
if (clock == slot->clock)
return;
slot->clock = clock;
/* Turn off the clock. */
clk = RD2(slot, SDHCI_CLOCK_CONTROL);
WR2(slot, SDHCI_CLOCK_CONTROL, clk & ~SDHCI_CLOCK_CARD_EN);
/* If no clock requested - leave it so. */
if (clock == 0)
return;
/* Determine the clock base frequency */
clk_base = slot->max_clk;
if (slot->quirks & SDHCI_QUIRK_BCM577XX_400KHZ_CLKSRC) {
clk_sel = RD2(slot, BCM577XX_HOST_CONTROL) &
BCM577XX_CTRL_CLKSEL_MASK;
/*
* Select clock source appropriate for the requested frequency.
*/
if ((clk_base / BCM577XX_DEFAULT_MAX_DIVIDER) > clock) {
clk_base = BCM577XX_ALT_CLOCK_BASE;
clk_sel |= (BCM577XX_CTRL_CLKSEL_64MHZ <<
BCM577XX_CTRL_CLKSEL_SHIFT);
} else {
clk_sel |= (BCM577XX_CTRL_CLKSEL_DEFAULT <<
BCM577XX_CTRL_CLKSEL_SHIFT);
}
WR2(slot, BCM577XX_HOST_CONTROL, clk_sel);
}
/* Recalculate timeout clock frequency based on the new sd clock. */
if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
slot->timeout_clk = slot->clock / 1000;
if (slot->version < SDHCI_SPEC_300) {
/* Looking for highest freq <= clock. */
res = clk_base;
for (div = 1; div < SDHCI_200_MAX_DIVIDER; div <<= 1) {
if (res <= clock)
break;
res >>= 1;
}
/* Divider 1:1 is 0x00, 2:1 is 0x01, 256:1 is 0x80 ... */
div >>= 1;
} else {
/* Version 3.0 divisors are multiples of two up to 1023 * 2 */
if (clock >= clk_base)
div = 0;
else {
for (div = 2; div < SDHCI_300_MAX_DIVIDER; div += 2) {
if ((clk_base / div) <= clock)
break;
}
}
div >>= 1;
}
if (bootverbose || sdhci_debug)
slot_printf(slot, "Divider %d for freq %d (base %d)\n",
div, clock, clk_base);
/* Now we have got divider, set it. */
clk = (div & SDHCI_DIVIDER_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div >> SDHCI_DIVIDER_MASK_LEN) & SDHCI_DIVIDER_HI_MASK)
<< SDHCI_DIVIDER_HI_SHIFT;
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
/* Enable clock. */
clk |= SDHCI_CLOCK_INT_EN;
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
/* Wait up to 10 ms until it stabilize. */
timeout = 10;
while (!((clk = RD2(slot, SDHCI_CLOCK_CONTROL))
& SDHCI_CLOCK_INT_STABLE)) {
if (timeout == 0) {
slot_printf(slot,
"Internal clock never stabilised.\n");
sdhci_dumpregs(slot);
return;
}
timeout--;
DELAY(1000);
}
/* Pass clock signal to the bus. */
clk |= SDHCI_CLOCK_CARD_EN;
WR2(slot, SDHCI_CLOCK_CONTROL, clk);
}
static void
sdhci_set_power(struct sdhci_slot *slot, u_char power)
{
int i;
uint8_t pwr;
if (slot->power == power)
return;
slot->power = power;
/* Turn off the power. */
pwr = 0;
WR1(slot, SDHCI_POWER_CONTROL, pwr);
/* If power down requested - leave it so. */
if (power == 0)
return;
/* Set voltage. */
switch (1 << power) {
case MMC_OCR_LOW_VOLTAGE:
pwr |= SDHCI_POWER_180;
break;
case MMC_OCR_290_300:
case MMC_OCR_300_310:
pwr |= SDHCI_POWER_300;
break;
case MMC_OCR_320_330:
case MMC_OCR_330_340:
pwr |= SDHCI_POWER_330;
break;
}
WR1(slot, SDHCI_POWER_CONTROL, pwr);
/*
* Turn on VDD1 power. Note that at least some Intel controllers can
* fail to enable bus power on the first try after transiting from D3
* to D0, so we give them up to 2 ms.
*/
pwr |= SDHCI_POWER_ON;
for (i = 0; i < 20; i++) {
WR1(slot, SDHCI_POWER_CONTROL, pwr);
if (RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON)
break;
DELAY(100);
}
if (!(RD1(slot, SDHCI_POWER_CONTROL) & SDHCI_POWER_ON))
slot_printf(slot, "Bus power failed to enable");
if (slot->quirks & SDHCI_QUIRK_INTEL_POWER_UP_RESET) {
WR1(slot, SDHCI_POWER_CONTROL, pwr | 0x10);
DELAY(10);
WR1(slot, SDHCI_POWER_CONTROL, pwr);
DELAY(300);
}
}
static void
sdhci_read_block_pio(struct sdhci_slot *slot)
{
uint32_t data;
char *buffer;
size_t left;
buffer = slot->curcmd->data->data;
buffer += slot->offset;
/* Transfer one block at a time. */
left = min(512, slot->curcmd->data->len - slot->offset);
slot->offset += left;
/* If we are too fast, broken controllers return zeroes. */
if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS)
DELAY(10);
/* Handle unaligned and aligned buffer cases. */
if ((intptr_t)buffer & 3) {
while (left > 3) {
data = RD4(slot, SDHCI_BUFFER);
buffer[0] = data;
buffer[1] = (data >> 8);
buffer[2] = (data >> 16);
buffer[3] = (data >> 24);
buffer += 4;
left -= 4;
}
} else {
RD_MULTI_4(slot, SDHCI_BUFFER,
(uint32_t *)buffer, left >> 2);
left &= 3;
}
/* Handle uneven size case. */
if (left > 0) {
data = RD4(slot, SDHCI_BUFFER);
while (left > 0) {
*(buffer++) = data;
data >>= 8;
left--;
}
}
}
static void
sdhci_write_block_pio(struct sdhci_slot *slot)
{
uint32_t data = 0;
char *buffer;
size_t left;
buffer = slot->curcmd->data->data;
buffer += slot->offset;
/* Transfer one block at a time. */
left = min(512, slot->curcmd->data->len - slot->offset);
slot->offset += left;
/* Handle unaligned and aligned buffer cases. */
if ((intptr_t)buffer & 3) {
while (left > 3) {
data = buffer[0] +
(buffer[1] << 8) +
(buffer[2] << 16) +
(buffer[3] << 24);
left -= 4;
buffer += 4;
WR4(slot, SDHCI_BUFFER, data);
}
} else {
WR_MULTI_4(slot, SDHCI_BUFFER,
(uint32_t *)buffer, left >> 2);
left &= 3;
}
/* Handle uneven size case. */
if (left > 0) {
while (left > 0) {
data <<= 8;
data += *(buffer++);
left--;
}
WR4(slot, SDHCI_BUFFER, data);
}
}
static void
sdhci_transfer_pio(struct sdhci_slot *slot)
{
/* Read as many blocks as possible. */
if (slot->curcmd->data->flags & MMC_DATA_READ) {
while (RD4(slot, SDHCI_PRESENT_STATE) &
SDHCI_DATA_AVAILABLE) {
sdhci_read_block_pio(slot);
if (slot->offset >= slot->curcmd->data->len)
break;
}
} else {
while (RD4(slot, SDHCI_PRESENT_STATE) &
SDHCI_SPACE_AVAILABLE) {
sdhci_write_block_pio(slot);
if (slot->offset >= slot->curcmd->data->len)
break;
}
}
}
static void
sdhci_card_task(void *arg, int pending __unused)
{
struct sdhci_slot *slot = arg;
device_t d;
SDHCI_LOCK(slot);
if (SDHCI_GET_CARD_PRESENT(slot->bus, slot)) {
#ifdef MMCCAM
if (slot->card_present == 0) {
#else
if (slot->dev == NULL) {
#endif
/* If card is present - attach mmc bus. */
if (bootverbose || sdhci_debug)
slot_printf(slot, "Card inserted\n");
#ifdef MMCCAM
slot->card_present = 1;
union ccb *ccb;
uint32_t pathid;
pathid = cam_sim_path(slot->sim);
ccb = xpt_alloc_ccb_nowait();
if (ccb == NULL) {
slot_printf(slot, "Unable to alloc CCB for rescan\n");
SDHCI_UNLOCK(slot);
return;
}
/*
* We create a rescan request for BUS:0:0, since the card
* will be at lun 0.
*/
if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
/* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
slot_printf(slot, "Unable to create path for rescan\n");
SDHCI_UNLOCK(slot);
xpt_free_ccb(ccb);
return;
}
SDHCI_UNLOCK(slot);
xpt_rescan(ccb);
#else
slot->dev = device_add_child(slot->bus, "mmc", -1);
device_set_ivars(slot->dev, slot);
SDHCI_UNLOCK(slot);
device_probe_and_attach(slot->dev);
#endif
} else
SDHCI_UNLOCK(slot);
} else {
#ifdef MMCCAM
if (slot->card_present == 1) {
#else
if (slot->dev != NULL) {
#endif
/* If no card present - detach mmc bus. */
if (bootverbose || sdhci_debug)
slot_printf(slot, "Card removed\n");
d = slot->dev;
slot->dev = NULL;
#ifdef MMCCAM
slot->card_present = 0;
union ccb *ccb;
uint32_t pathid;
pathid = cam_sim_path(slot->sim);
ccb = xpt_alloc_ccb_nowait();
if (ccb == NULL) {
slot_printf(slot, "Unable to alloc CCB for rescan\n");
SDHCI_UNLOCK(slot);
return;
}
/*
* We create a rescan request for BUS:0:0, since the card
* will be at lun 0.
*/
if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
/* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
slot_printf(slot, "Unable to create path for rescan\n");
SDHCI_UNLOCK(slot);
xpt_free_ccb(ccb);
return;
}
SDHCI_UNLOCK(slot);
xpt_rescan(ccb);
#else
SDHCI_UNLOCK(slot);
device_delete_child(slot->bus, d);
#endif
} else
SDHCI_UNLOCK(slot);
}
}
static void
sdhci_handle_card_present_locked(struct sdhci_slot *slot, bool is_present)
{
bool was_present;
/*
* If there was no card and now there is one, schedule the task to
* create the child device after a short delay. The delay is to
* debounce the card insert (sometimes the card detect pin stabilizes
* before the other pins have made good contact).
*
* If there was a card present and now it's gone, immediately schedule
* the task to delete the child device. No debouncing -- gone is gone,
* because once power is removed, a full card re-init is needed, and
* that happens by deleting and recreating the child device.
*/
#ifdef MMCCAM
was_present = slot->card_present;
#else
was_present = slot->dev != NULL;
#endif
if (!was_present && is_present) {
taskqueue_enqueue_timeout(taskqueue_swi_giant,
&slot->card_delayed_task, -SDHCI_INSERT_DELAY_TICKS);
} else if (was_present && !is_present) {
taskqueue_enqueue(taskqueue_swi_giant, &slot->card_task);
}
}
void
sdhci_handle_card_present(struct sdhci_slot *slot, bool is_present)
{
SDHCI_LOCK(slot);
sdhci_handle_card_present_locked(slot, is_present);
SDHCI_UNLOCK(slot);
}
static void
sdhci_card_poll(void *arg)
{
struct sdhci_slot *slot = arg;
sdhci_handle_card_present(slot,
SDHCI_GET_CARD_PRESENT(slot->bus, slot));
callout_reset(&slot->card_poll_callout, SDHCI_CARD_PRESENT_TICKS,
sdhci_card_poll, slot);
}
int
sdhci_init_slot(device_t dev, struct sdhci_slot *slot, int num)
{
uint32_t caps, caps2, freq, host_caps;
int err;
SDHCI_LOCK_INIT(slot);
slot->num = num;
slot->bus = dev;
/* Allocate DMA tag. */
err = bus_dma_tag_create(bus_get_dma_tag(dev),
DMA_BLOCK_SIZE, 0, BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL,
DMA_BLOCK_SIZE, 1, DMA_BLOCK_SIZE,
BUS_DMA_ALLOCNOW, NULL, NULL,
&slot->dmatag);
if (err != 0) {
device_printf(dev, "Can't create DMA tag\n");
SDHCI_LOCK_DESTROY(slot);
return (err);
}
/* Allocate DMA memory. */
err = bus_dmamem_alloc(slot->dmatag, (void **)&slot->dmamem,
BUS_DMA_NOWAIT, &slot->dmamap);
if (err != 0) {
device_printf(dev, "Can't alloc DMA memory\n");
SDHCI_LOCK_DESTROY(slot);
return (err);
}
/* Map the memory. */
err = bus_dmamap_load(slot->dmatag, slot->dmamap,
(void *)slot->dmamem, DMA_BLOCK_SIZE,
sdhci_getaddr, &slot->paddr, 0);
if (err != 0 || slot->paddr == 0) {
device_printf(dev, "Can't load DMA memory\n");
SDHCI_LOCK_DESTROY(slot);
if (err)
return (err);
else
return (EFAULT);
}
/* Initialize slot. */
sdhci_init(slot);
slot->version = (RD2(slot, SDHCI_HOST_VERSION)
>> SDHCI_SPEC_VER_SHIFT) & SDHCI_SPEC_VER_MASK;
if (slot->quirks & SDHCI_QUIRK_MISSING_CAPS) {
caps = slot->caps;
caps2 = slot->caps2;
} else {
caps = RD4(slot, SDHCI_CAPABILITIES);
if (slot->version >= SDHCI_SPEC_300)
caps2 = RD4(slot, SDHCI_CAPABILITIES2);
else
caps2 = 0;
}
/* Calculate base clock frequency. */
if (slot->version >= SDHCI_SPEC_300)
freq = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
else
freq = (caps & SDHCI_CLOCK_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
if (freq != 0)
slot->max_clk = freq * 1000000;
/*
* If the frequency wasn't in the capabilities and the hardware driver
* hasn't already set max_clk we're probably not going to work right
* with an assumption, so complain about it.
*/
if (slot->max_clk == 0) {
slot->max_clk = SDHCI_DEFAULT_MAX_FREQ * 1000000;
device_printf(dev, "Hardware doesn't specify base clock "
"frequency, using %dMHz as default.\n",
SDHCI_DEFAULT_MAX_FREQ);
}
/* Calculate/set timeout clock frequency. */
if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK) {
slot->timeout_clk = slot->max_clk / 1000;
} else if (slot->quirks & SDHCI_QUIRK_DATA_TIMEOUT_1MHZ) {
slot->timeout_clk = 1000;
} else {
slot->timeout_clk = (caps & SDHCI_TIMEOUT_CLK_MASK) >>
SDHCI_TIMEOUT_CLK_SHIFT;
if (caps & SDHCI_TIMEOUT_CLK_UNIT)
slot->timeout_clk *= 1000;
}
/*
* If the frequency wasn't in the capabilities and the hardware driver
* hasn't already set timeout_clk we'll probably work okay using the
* max timeout, but still mention it.
*/
if (slot->timeout_clk == 0) {
device_printf(dev, "Hardware doesn't specify timeout clock "
"frequency, setting BROKEN_TIMEOUT quirk.\n");
slot->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
}
slot->host.f_min = SDHCI_MIN_FREQ(slot->bus, slot);
slot->host.f_max = slot->max_clk;
slot->host.host_ocr = 0;
if (caps & SDHCI_CAN_VDD_330)
slot->host.host_ocr |= MMC_OCR_320_330 | MMC_OCR_330_340;
if (caps & SDHCI_CAN_VDD_300)
slot->host.host_ocr |= MMC_OCR_290_300 | MMC_OCR_300_310;
if (caps & SDHCI_CAN_VDD_180)
slot->host.host_ocr |= MMC_OCR_LOW_VOLTAGE;
if (slot->host.host_ocr == 0) {
device_printf(dev, "Hardware doesn't report any "
"support voltages.\n");
}
host_caps = MMC_CAP_4_BIT_DATA;
if (caps & SDHCI_CAN_DO_8BITBUS)
host_caps |= MMC_CAP_8_BIT_DATA;
if (caps & SDHCI_CAN_DO_HISPD)
host_caps |= MMC_CAP_HSPEED;
if (slot->quirks & SDHCI_QUIRK_BOOT_NOACC)
host_caps |= MMC_CAP_BOOT_NOACC;
if (slot->quirks & SDHCI_QUIRK_WAIT_WHILE_BUSY)
host_caps |= MMC_CAP_WAIT_WHILE_BUSY;
if (caps2 & (SDHCI_CAN_SDR50 | SDHCI_CAN_SDR104 | SDHCI_CAN_DDR50))
host_caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
if (caps2 & SDHCI_CAN_SDR104) {
host_caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
if (!(slot->quirks & SDHCI_QUIRK_BROKEN_MMC_HS200))
host_caps |= MMC_CAP_MMC_HS200;
} else if (caps2 & SDHCI_CAN_SDR50)
host_caps |= MMC_CAP_UHS_SDR50;
if (caps2 & SDHCI_CAN_DDR50 &&
!(slot->quirks & SDHCI_QUIRK_BROKEN_UHS_DDR50))
host_caps |= MMC_CAP_UHS_DDR50;
if (slot->quirks & SDHCI_QUIRK_MMC_DDR52)
host_caps |= MMC_CAP_MMC_DDR52;
if (slot->quirks & SDHCI_QUIRK_CAPS_BIT63_FOR_MMC_HS400 &&
caps2 & SDHCI_CAN_MMC_HS400)
host_caps |= MMC_CAP_MMC_HS400;
host_caps |= MMC_CAP_SIGNALING_330;
if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50 |
MMC_CAP_MMC_DDR52_180 | MMC_CAP_MMC_HS200_180 |
MMC_CAP_MMC_HS400_180))
host_caps |= MMC_CAP_SIGNALING_180;
if (caps2 & SDHCI_CAN_DRIVE_TYPE_A)
host_caps |= MMC_CAP_DRIVER_TYPE_A;
if (caps2 & SDHCI_CAN_DRIVE_TYPE_C)
host_caps |= MMC_CAP_DRIVER_TYPE_C;
if (caps2 & SDHCI_CAN_DRIVE_TYPE_D)
host_caps |= MMC_CAP_DRIVER_TYPE_D;
slot->host.caps = host_caps;
/* Decide if we have usable DMA. */
if (caps & SDHCI_CAN_DO_DMA)
slot->opt |= SDHCI_HAVE_DMA;
if (slot->quirks & SDHCI_QUIRK_BROKEN_DMA)
slot->opt &= ~SDHCI_HAVE_DMA;
if (slot->quirks & SDHCI_QUIRK_FORCE_DMA)
slot->opt |= SDHCI_HAVE_DMA;
if (slot->quirks & SDHCI_QUIRK_ALL_SLOTS_NON_REMOVABLE)
slot->opt |= SDHCI_NON_REMOVABLE;
/*
* Use platform-provided transfer backend
* with PIO as a fallback mechanism
*/
if (slot->opt & SDHCI_PLATFORM_TRANSFER)
slot->opt &= ~SDHCI_HAVE_DMA;
if (bootverbose || sdhci_debug) {
slot_printf(slot,
"%uMHz%s %s VDD:%s%s%s VCCQ: 3.3V%s%s DRV: B%s%s%s %s\n",
slot->max_clk / 1000000,
(caps & SDHCI_CAN_DO_HISPD) ? " HS" : "",
(host_caps & MMC_CAP_8_BIT_DATA) ? "8bits" :
((host_caps & MMC_CAP_4_BIT_DATA) ? "4bits" : "1bit"),
(caps & SDHCI_CAN_VDD_330) ? " 3.3V" : "",
(caps & SDHCI_CAN_VDD_300) ? " 3.0V" : "",
(caps & SDHCI_CAN_VDD_180) ? " 1.8V" : "",
(host_caps & MMC_CAP_SIGNALING_180) ? " 1.8V" : "",
(host_caps & MMC_CAP_SIGNALING_120) ? " 1.2V" : "",
(caps2 & SDHCI_CAN_DRIVE_TYPE_A) ? "A" : "",
(caps2 & SDHCI_CAN_DRIVE_TYPE_C) ? "C" : "",
(caps2 & SDHCI_CAN_DRIVE_TYPE_D) ? "D" : "",
(slot->opt & SDHCI_HAVE_DMA) ? "DMA" : "PIO");
if (host_caps & (MMC_CAP_MMC_DDR52 | MMC_CAP_MMC_HS200 |
MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE))
slot_printf(slot, "eMMC:%s%s%s%s\n",
(host_caps & MMC_CAP_MMC_DDR52) ? " DDR52" : "",
(host_caps & MMC_CAP_MMC_HS200) ? " HS200" : "",
(host_caps & MMC_CAP_MMC_HS400) ? " HS400" : "",
((host_caps &
(MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) ==
(MMC_CAP_MMC_HS400 | MMC_CAP_MMC_ENH_STROBE)) ?
" HS400ES" : "");
if (host_caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104))
slot_printf(slot, "UHS-I:%s%s%s%s%s\n",
(host_caps & MMC_CAP_UHS_SDR12) ? " SDR12" : "",
(host_caps & MMC_CAP_UHS_SDR25) ? " SDR25" : "",
(host_caps & MMC_CAP_UHS_SDR50) ? " SDR50" : "",
(host_caps & MMC_CAP_UHS_SDR104) ? " SDR104" : "",
(host_caps & MMC_CAP_UHS_DDR50) ? " DDR50" : "");
sdhci_dumpregs(slot);
}
slot->timeout = 10;
SYSCTL_ADD_INT(device_get_sysctl_ctx(slot->bus),
SYSCTL_CHILDREN(device_get_sysctl_tree(slot->bus)), OID_AUTO,
"timeout", CTLFLAG_RW, &slot->timeout, 0,
"Maximum timeout for SDHCI transfers (in secs)");
TASK_INIT(&slot->card_task, 0, sdhci_card_task, slot);
TIMEOUT_TASK_INIT(taskqueue_swi_giant, &slot->card_delayed_task, 0,
sdhci_card_task, slot);
callout_init(&slot->card_poll_callout, 1);
callout_init_mtx(&slot->timeout_callout, &slot->mtx, 0);
if ((slot->quirks & SDHCI_QUIRK_POLL_CARD_PRESENT) &&
!(slot->opt & SDHCI_NON_REMOVABLE)) {
callout_reset(&slot->card_poll_callout,
SDHCI_CARD_PRESENT_TICKS, sdhci_card_poll, slot);
}
return (0);
}
void
sdhci_start_slot(struct sdhci_slot *slot)
{
sdhci_card_task(slot, 0);
}
int
sdhci_cleanup_slot(struct sdhci_slot *slot)
{
device_t d;
callout_drain(&slot->timeout_callout);
callout_drain(&slot->card_poll_callout);
taskqueue_drain(taskqueue_swi_giant, &slot->card_task);
taskqueue_drain_timeout(taskqueue_swi_giant, &slot->card_delayed_task);
SDHCI_LOCK(slot);
d = slot->dev;
slot->dev = NULL;
SDHCI_UNLOCK(slot);
if (d != NULL)
device_delete_child(slot->bus, d);
SDHCI_LOCK(slot);
sdhci_reset(slot, SDHCI_RESET_ALL);
SDHCI_UNLOCK(slot);
bus_dmamap_unload(slot->dmatag, slot->dmamap);
bus_dmamem_free(slot->dmatag, slot->dmamem, slot->dmamap);
bus_dma_tag_destroy(slot->dmatag);
SDHCI_LOCK_DESTROY(slot);
return (0);
}
int
sdhci_generic_suspend(struct sdhci_slot *slot)
{
sdhci_reset(slot, SDHCI_RESET_ALL);
return (0);
}
int
sdhci_generic_resume(struct sdhci_slot *slot)
{
sdhci_init(slot);
return (0);
}
uint32_t
sdhci_generic_min_freq(device_t brdev __unused, struct sdhci_slot *slot)
{
if (slot->version >= SDHCI_SPEC_300)
return (slot->max_clk / SDHCI_300_MAX_DIVIDER);
else
return (slot->max_clk / SDHCI_200_MAX_DIVIDER);
}
bool
sdhci_generic_get_card_present(device_t brdev __unused, struct sdhci_slot *slot)
{
if (slot->opt & SDHCI_NON_REMOVABLE)
return true;
return (RD4(slot, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
}
void
sdhci_generic_set_uhs_timing(device_t brdev __unused, struct sdhci_slot *slot)
{
struct mmc_ios *ios;
uint16_t hostctrl2;
if (slot->version < SDHCI_SPEC_300)
return;
ios = &slot->host.ios;
sdhci_set_clock(slot, 0);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
hostctrl2 &= ~SDHCI_CTRL2_UHS_MASK;
if (ios->timing == bus_timing_mmc_hs400 ||
ios->timing == bus_timing_mmc_hs400es)
hostctrl2 |= SDHCI_CTRL2_MMC_HS400;
else if (ios->clock > SD_SDR50_MAX)
hostctrl2 |= SDHCI_CTRL2_UHS_SDR104;
else if (ios->clock > SD_SDR25_MAX)
hostctrl2 |= SDHCI_CTRL2_UHS_SDR50;
else if (ios->clock > SD_SDR12_MAX) {
if (ios->timing == bus_timing_uhs_ddr50 ||
ios->timing == bus_timing_mmc_ddr52)
hostctrl2 |= SDHCI_CTRL2_UHS_DDR50;
else
hostctrl2 |= SDHCI_CTRL2_UHS_SDR25;
} else if (ios->clock > SD_MMC_CARD_ID_FREQUENCY)
hostctrl2 |= SDHCI_CTRL2_UHS_SDR12;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
sdhci_set_clock(slot, ios->clock);
}
int
sdhci_generic_update_ios(device_t brdev, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
struct mmc_ios *ios = &slot->host.ios;
device_printf(brdev, "This is a bridge device\n");
device_printf(reqdev, "This is a request device\n");
slot_printf(slot, " <--- The locking slot is this\n");
SDHCI_LOCK(slot);
/* Do full reset on bus power down to clear from any state. */
if (ios->power_mode == power_off) {
WR4(slot, SDHCI_SIGNAL_ENABLE, 0);
sdhci_init(slot);
}
/* Configure the bus. */
sdhci_set_clock(slot, ios->clock);
sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd);
if (ios->bus_width == bus_width_8) {
slot->hostctrl |= SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_4) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl |= SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_1) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else {
panic("Invalid bus width: %d", ios->bus_width);
}
if (ios->clock > SD_SDR12_MAX &&
!(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT))
slot->hostctrl |= SDHCI_CTRL_HISPD;
else
slot->hostctrl &= ~SDHCI_CTRL_HISPD;
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl);
SDHCI_SET_UHS_TIMING(brdev, slot);
/* Some controllers like reset after bus changes. */
if (slot->quirks & SDHCI_QUIRK_RESET_ON_IOS)
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
SDHCI_UNLOCK(slot);
return (0);
}
int
sdhci_generic_switch_vccq(device_t brdev __unused, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
enum mmc_vccq vccq;
int err;
uint16_t hostctrl2;
if (slot->version < SDHCI_SPEC_300)
return (0);
err = 0;
vccq = slot->host.ios.vccq;
SDHCI_LOCK(slot);
sdhci_set_clock(slot, 0);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
switch (vccq) {
case vccq_330:
if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE))
goto done;
hostctrl2 &= ~SDHCI_CTRL2_S18_ENABLE;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
DELAY(5000);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (!(hostctrl2 & SDHCI_CTRL2_S18_ENABLE))
goto done;
err = EAGAIN;
break;
case vccq_180:
if (!(slot->host.caps & MMC_CAP_SIGNALING_180)) {
err = EINVAL;
goto done;
}
if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE)
goto done;
hostctrl2 |= SDHCI_CTRL2_S18_ENABLE;
WR2(slot, SDHCI_HOST_CONTROL2, hostctrl2);
DELAY(5000);
hostctrl2 = RD2(slot, SDHCI_HOST_CONTROL2);
if (hostctrl2 & SDHCI_CTRL2_S18_ENABLE)
goto done;
err = EAGAIN;
break;
default:
slot_printf(slot,
"Attempt to set unsupported signaling voltage\n");
err = EINVAL;
break;
}
done:
sdhci_set_clock(slot, slot->host.ios.clock);
SDHCI_UNLOCK(slot);
return (err);
}
#ifdef MMCCAM
static void
sdhci_req_done(struct sdhci_slot *slot)
{
union ccb *ccb;
if (sdhci_debug > 1)
slot_printf(slot, "sdhci_req_done()\n");
if (slot->ccb != NULL && slot->curcmd != NULL) {
callout_stop(&slot->timeout_callout);
ccb = slot->ccb;
slot->ccb = NULL;
slot->curcmd = NULL;
/* Tell CAM the request is finished */
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
ccb->ccb_h.status =
(mmcio->cmd.error == 0 ? CAM_REQ_CMP : CAM_REQ_CMP_ERR);
xpt_done(ccb);
}
}
#else
static void
sdhci_req_done(struct sdhci_slot *slot)
{
struct mmc_request *req;
if (slot->req != NULL && slot->curcmd != NULL) {
callout_stop(&slot->timeout_callout);
req = slot->req;
slot->req = NULL;
slot->curcmd = NULL;
req->done(req);
}
}
#endif
static void
sdhci_timeout(void *arg)
{
struct sdhci_slot *slot = arg;
if (slot->curcmd != NULL) {
slot_printf(slot, " Controller timeout\n");
sdhci_dumpregs(slot);
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
slot->curcmd->error = MMC_ERR_TIMEOUT;
sdhci_req_done(slot);
} else {
slot_printf(slot, " Spurious timeout - no active command\n");
}
}
static void
sdhci_set_transfer_mode(struct sdhci_slot *slot, struct mmc_data *data)
{
uint16_t mode;
if (data == NULL)
return;
mode = SDHCI_TRNS_BLK_CNT_EN;
if (data->len > 512)
mode |= SDHCI_TRNS_MULTI;
if (data->flags & MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
#ifdef MMCCAM
struct ccb_mmcio *mmcio;
mmcio = &slot->ccb->mmcio;
if (mmcio->stop.opcode == MMC_STOP_TRANSMISSION
&& !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))
mode |= SDHCI_TRNS_ACMD12;
#else
if (slot->req->stop && !(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP))
mode |= SDHCI_TRNS_ACMD12;
#endif
if (slot->flags & SDHCI_USE_DMA)
mode |= SDHCI_TRNS_DMA;
WR2(slot, SDHCI_TRANSFER_MODE, mode);
}
static void
sdhci_start_command(struct sdhci_slot *slot, struct mmc_command *cmd)
{
int flags, timeout;
uint32_t mask;
slot->curcmd = cmd;
slot->cmd_done = 0;
cmd->error = MMC_ERR_NONE;
/* This flags combination is not supported by controller. */
if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
slot_printf(slot, "Unsupported response type!\n");
cmd->error = MMC_ERR_FAILED;
sdhci_req_done(slot);
return;
}
/*
* Do not issue command if there is no card, clock or power.
* Controller will not detect timeout without clock active.
*/
if (!SDHCI_GET_CARD_PRESENT(slot->bus, slot) ||
slot->power == 0 ||
slot->clock == 0) {
slot_printf(slot,
"Cannot issue a command (power=%d clock=%d)",
slot->power, slot->clock);
cmd->error = MMC_ERR_FAILED;
sdhci_req_done(slot);
return;
}
/* Always wait for free CMD bus. */
mask = SDHCI_CMD_INHIBIT;
/* Wait for free DAT if we have data or busy signal. */
if (cmd->data != NULL || (cmd->flags & MMC_RSP_BUSY))
mask |= SDHCI_DAT_INHIBIT;
/* We shouldn't wait for DAT for stop commands. */
#ifdef MMCCAM
struct ccb_mmcio *mmcio = &slot->ccb->mmcio;
if (cmd == &mmcio->stop)
mask &= ~SDHCI_DAT_INHIBIT;
#else
if (cmd == slot->req->stop)
mask &= ~SDHCI_DAT_INHIBIT;
#endif
/*
* Wait for bus no more then 250 ms. Typically there will be no wait
* here at all, but when writing a crash dump we may be bypassing the
* host platform's interrupt handler, and in some cases that handler
* may be working around hardware quirks such as not respecting r1b
* busy indications. In those cases, this wait-loop serves the purpose
* of waiting for the prior command and data transfers to be done, and
* SD cards are allowed to take up to 250ms for write and erase ops.
* (It's usually more like 20-30ms in the real world.)
*/
timeout = 250;
while (mask & RD4(slot, SDHCI_PRESENT_STATE)) {
if (timeout == 0) {
slot_printf(slot, "Controller never released "
"inhibit bit(s).\n");
sdhci_dumpregs(slot);
cmd->error = MMC_ERR_FAILED;
sdhci_req_done(slot);
return;
}
timeout--;
DELAY(1000);
}
/* Prepare command flags. */
if (!(cmd->flags & MMC_RSP_PRESENT))
flags = SDHCI_CMD_RESP_NONE;
else if (cmd->flags & MMC_RSP_136)
flags = SDHCI_CMD_RESP_LONG;
else if (cmd->flags & MMC_RSP_BUSY)
flags = SDHCI_CMD_RESP_SHORT_BUSY;
else
flags = SDHCI_CMD_RESP_SHORT;
if (cmd->flags & MMC_RSP_CRC)
flags |= SDHCI_CMD_CRC;
if (cmd->flags & MMC_RSP_OPCODE)
flags |= SDHCI_CMD_INDEX;
if (cmd->data != NULL)
flags |= SDHCI_CMD_DATA;
if (cmd->opcode == MMC_STOP_TRANSMISSION)
flags |= SDHCI_CMD_TYPE_ABORT;
/* Prepare data. */
sdhci_start_data(slot, cmd->data);
/*
* Interrupt aggregation: To reduce total number of interrupts
* group response interrupt with data interrupt when possible.
* If there going to be data interrupt, mask response one.
*/
if (slot->data_done == 0) {
WR4(slot, SDHCI_SIGNAL_ENABLE,
slot->intmask &= ~SDHCI_INT_RESPONSE);
}
/* Set command argument. */
WR4(slot, SDHCI_ARGUMENT, cmd->arg);
/* Set data transfer mode. */
sdhci_set_transfer_mode(slot, cmd->data);
if (sdhci_debug > 1)
slot_printf(slot, "Starting command!\n");
/* Start command. */
WR2(slot, SDHCI_COMMAND_FLAGS, (cmd->opcode << 8) | (flags & 0xff));
/* Start timeout callout. */
callout_reset(&slot->timeout_callout, slot->timeout * hz,
sdhci_timeout, slot);
}
static void
sdhci_finish_command(struct sdhci_slot *slot)
{
int i;
uint32_t val;
uint8_t extra;
if (sdhci_debug > 1)
slot_printf(slot, "%s: called, err %d flags %d\n",
__func__, slot->curcmd->error, slot->curcmd->flags);
slot->cmd_done = 1;
/*
* Interrupt aggregation: Restore command interrupt.
* Main restore point for the case when command interrupt
* happened first.
*/
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask |= SDHCI_INT_RESPONSE);
/* In case of error - reset host and return. */
if (slot->curcmd->error) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
sdhci_start(slot);
return;
}
/* If command has response - fetch it. */
if (slot->curcmd->flags & MMC_RSP_PRESENT) {
if (slot->curcmd->flags & MMC_RSP_136) {
/* CRC is stripped so we need one byte shift. */
extra = 0;
for (i = 0; i < 4; i++) {
val = RD4(slot, SDHCI_RESPONSE + i * 4);
if (slot->quirks &
SDHCI_QUIRK_DONT_SHIFT_RESPONSE)
slot->curcmd->resp[3 - i] = val;
else {
slot->curcmd->resp[3 - i] =
(val << 8) | extra;
extra = val >> 24;
}
}
} else
slot->curcmd->resp[0] = RD4(slot, SDHCI_RESPONSE);
}
if (sdhci_debug > 1)
printf("Resp: %02x %02x %02x %02x\n",
slot->curcmd->resp[0], slot->curcmd->resp[1],
slot->curcmd->resp[2], slot->curcmd->resp[3]);
/* If data ready - finish. */
if (slot->data_done)
sdhci_start(slot);
}
static void
sdhci_start_data(struct sdhci_slot *slot, struct mmc_data *data)
{
uint32_t target_timeout, current_timeout;
uint8_t div;
if (data == NULL && (slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
slot->data_done = 1;
return;
}
slot->data_done = 0;
/* Calculate and set data timeout.*/
/* XXX: We should have this from mmc layer, now assume 1 sec. */
if (slot->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL) {
div = 0xE;
} else {
target_timeout = 1000000;
div = 0;
current_timeout = (1 << 13) * 1000 / slot->timeout_clk;
while (current_timeout < target_timeout && div < 0xE) {
++div;
current_timeout <<= 1;
}
/* Compensate for an off-by-one error in the CaFe chip.*/
if (div < 0xE &&
(slot->quirks & SDHCI_QUIRK_INCR_TIMEOUT_CONTROL)) {
++div;
}
}
WR1(slot, SDHCI_TIMEOUT_CONTROL, div);
if (data == NULL)
return;
/* Use DMA if possible. */
if ((slot->opt & SDHCI_HAVE_DMA))
slot->flags |= SDHCI_USE_DMA;
/* If data is small, broken DMA may return zeroes instead of data, */
if ((slot->quirks & SDHCI_QUIRK_BROKEN_TIMINGS) &&
(data->len <= 512))
slot->flags &= ~SDHCI_USE_DMA;
/* Some controllers require even block sizes. */
if ((slot->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) &&
((data->len) & 0x3))
slot->flags &= ~SDHCI_USE_DMA;
/* Load DMA buffer. */
if (slot->flags & SDHCI_USE_DMA) {
if (data->flags & MMC_DATA_READ)
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREREAD);
else {
memcpy(slot->dmamem, data->data,
(data->len < DMA_BLOCK_SIZE) ?
data->len : DMA_BLOCK_SIZE);
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREWRITE);
}
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
/* Interrupt aggregation: Mask border interrupt
* for the last page and unmask else. */
if (data->len == DMA_BLOCK_SIZE)
slot->intmask &= ~SDHCI_INT_DMA_END;
else
slot->intmask |= SDHCI_INT_DMA_END;
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
/* Current data offset for both PIO and DMA. */
slot->offset = 0;
/* Set block size and request IRQ on 4K border. */
WR2(slot, SDHCI_BLOCK_SIZE, SDHCI_MAKE_BLKSZ(DMA_BOUNDARY,
(data->len < 512) ? data->len : 512));
/* Set block count. */
WR2(slot, SDHCI_BLOCK_COUNT, (data->len + 511) / 512);
if (sdhci_debug > 1)
slot_printf(slot, "Block size: %02x, count %lu\n", (unsigned int)
SDHCI_MAKE_BLKSZ(DMA_BOUNDARY, (data->len < 512)?data->len:512),
(unsigned long)(data->len + 511) / 512);
}
void
sdhci_finish_data(struct sdhci_slot *slot)
{
struct mmc_data *data = slot->curcmd->data;
size_t left;
/* Interrupt aggregation: Restore command interrupt.
* Auxiliary restore point for the case when data interrupt
* happened first. */
if (!slot->cmd_done) {
WR4(slot, SDHCI_SIGNAL_ENABLE,
slot->intmask |= SDHCI_INT_RESPONSE);
}
/* Unload rest of data from DMA buffer. */
if (!slot->data_done && (slot->flags & SDHCI_USE_DMA) &&
slot->curcmd->data != NULL) {
if (data->flags & MMC_DATA_READ) {
left = data->len - slot->offset;
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTREAD);
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
(left < DMA_BLOCK_SIZE) ? left : DMA_BLOCK_SIZE);
} else
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTWRITE);
}
slot->data_done = 1;
/* If there was error - reset the host. */
if (slot->curcmd->error) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
sdhci_start(slot);
return;
}
/* If we already have command response - finish. */
if (slot->cmd_done)
sdhci_start(slot);
}
#ifdef MMCCAM
static void
sdhci_start(struct sdhci_slot *slot)
{
union ccb *ccb;
ccb = slot->ccb;
if (ccb == NULL)
return;
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
if (!(slot->flags & CMD_STARTED)) {
slot->flags |= CMD_STARTED;
sdhci_start_command(slot, &mmcio->cmd);
return;
}
/*
* Old stack doesn't use this!
* Enabling this code causes significant performance degradation
* and IRQ storms on BBB, Wandboard behaves fine.
* Not using this code does no harm...
if (!(slot->flags & STOP_STARTED) && mmcio->stop.opcode != 0) {
slot->flags |= STOP_STARTED;
sdhci_start_command(slot, &mmcio->stop);
return;
}
*/
if (sdhci_debug > 1)
slot_printf(slot, "result: %d\n", mmcio->cmd.error);
if (mmcio->cmd.error == 0 &&
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST)) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
}
sdhci_req_done(slot);
}
#else
static void
sdhci_start(struct sdhci_slot *slot)
{
struct mmc_request *req;
req = slot->req;
if (req == NULL)
return;
if (!(slot->flags & CMD_STARTED)) {
slot->flags |= CMD_STARTED;
sdhci_start_command(slot, req->cmd);
return;
}
if ((slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP) &&
!(slot->flags & STOP_STARTED) && req->stop) {
slot->flags |= STOP_STARTED;
sdhci_start_command(slot, req->stop);
return;
}
if (sdhci_debug > 1)
slot_printf(slot, "result: %d\n", req->cmd->error);
if (!req->cmd->error &&
((slot->curcmd == req->stop &&
(slot->quirks & SDHCI_QUIRK_BROKEN_AUTO_STOP)) ||
(slot->quirks & SDHCI_QUIRK_RESET_AFTER_REQUEST))) {
sdhci_reset(slot, SDHCI_RESET_CMD);
sdhci_reset(slot, SDHCI_RESET_DATA);
}
sdhci_req_done(slot);
}
#endif
int
sdhci_generic_request(device_t brdev __unused, device_t reqdev,
struct mmc_request *req)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
SDHCI_LOCK(slot);
if (slot->req != NULL) {
SDHCI_UNLOCK(slot);
return (EBUSY);
}
if (sdhci_debug > 1) {
slot_printf(slot,
"CMD%u arg %#x flags %#x dlen %u dflags %#x\n",
req->cmd->opcode, req->cmd->arg, req->cmd->flags,
(req->cmd->data)?(u_int)req->cmd->data->len:0,
(req->cmd->data)?req->cmd->data->flags:0);
}
slot->req = req;
slot->flags = 0;
sdhci_start(slot);
SDHCI_UNLOCK(slot);
if (dumping) {
while (slot->req != NULL) {
sdhci_generic_intr(slot);
DELAY(10);
}
}
return (0);
}
int
sdhci_generic_get_ro(device_t brdev __unused, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
uint32_t val;
SDHCI_LOCK(slot);
val = RD4(slot, SDHCI_PRESENT_STATE);
SDHCI_UNLOCK(slot);
return (!(val & SDHCI_WRITE_PROTECT));
}
int
sdhci_generic_acquire_host(device_t brdev __unused, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
int err = 0;
SDHCI_LOCK(slot);
while (slot->bus_busy)
msleep(slot, &slot->mtx, 0, "sdhciah", 0);
slot->bus_busy++;
/* Activate led. */
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl |= SDHCI_CTRL_LED);
SDHCI_UNLOCK(slot);
return (err);
}
int
sdhci_generic_release_host(device_t brdev __unused, device_t reqdev)
{
struct sdhci_slot *slot = device_get_ivars(reqdev);
SDHCI_LOCK(slot);
/* Deactivate led. */
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl &= ~SDHCI_CTRL_LED);
slot->bus_busy--;
SDHCI_UNLOCK(slot);
wakeup(slot);
return (0);
}
static void
sdhci_cmd_irq(struct sdhci_slot *slot, uint32_t intmask)
{
if (!slot->curcmd) {
slot_printf(slot, "Got command interrupt 0x%08x, but "
"there is no active command.\n", intmask);
sdhci_dumpregs(slot);
return;
}
if (intmask & SDHCI_INT_TIMEOUT)
slot->curcmd->error = MMC_ERR_TIMEOUT;
else if (intmask & SDHCI_INT_CRC)
slot->curcmd->error = MMC_ERR_BADCRC;
else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
slot->curcmd->error = MMC_ERR_FIFO;
sdhci_finish_command(slot);
}
static void
sdhci_data_irq(struct sdhci_slot *slot, uint32_t intmask)
{
struct mmc_data *data;
if (!slot->curcmd) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is no active command.\n", intmask);
sdhci_dumpregs(slot);
return;
}
if (slot->curcmd->data == NULL &&
(slot->curcmd->flags & MMC_RSP_BUSY) == 0) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is no active data operation.\n",
intmask);
sdhci_dumpregs(slot);
return;
}
if (intmask & SDHCI_INT_DATA_TIMEOUT)
slot->curcmd->error = MMC_ERR_TIMEOUT;
else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
slot->curcmd->error = MMC_ERR_BADCRC;
if (slot->curcmd->data == NULL &&
(intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
SDHCI_INT_DMA_END))) {
slot_printf(slot, "Got data interrupt 0x%08x, but "
"there is busy-only command.\n", intmask);
sdhci_dumpregs(slot);
slot->curcmd->error = MMC_ERR_INVALID;
}
if (slot->curcmd->error) {
/* No need to continue after any error. */
goto done;
}
/* Handle PIO interrupt. */
if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL)) {
if ((slot->opt & SDHCI_PLATFORM_TRANSFER) &&
SDHCI_PLATFORM_WILL_HANDLE(slot->bus, slot)) {
SDHCI_PLATFORM_START_TRANSFER(slot->bus, slot,
&intmask);
slot->flags |= PLATFORM_DATA_STARTED;
} else
sdhci_transfer_pio(slot);
}
/* Handle DMA border. */
if (intmask & SDHCI_INT_DMA_END) {
data = slot->curcmd->data;
size_t left;
/* Unload DMA buffer ... */
left = data->len - slot->offset;
if (data->flags & MMC_DATA_READ) {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTREAD);
memcpy((u_char*)data->data + slot->offset, slot->dmamem,
(left < DMA_BLOCK_SIZE) ? left : DMA_BLOCK_SIZE);
} else {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_POSTWRITE);
}
/* ... and reload it again. */
slot->offset += DMA_BLOCK_SIZE;
left = data->len - slot->offset;
if (data->flags & MMC_DATA_READ) {
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREREAD);
} else {
memcpy(slot->dmamem, (u_char*)data->data + slot->offset,
(left < DMA_BLOCK_SIZE)? left : DMA_BLOCK_SIZE);
bus_dmamap_sync(slot->dmatag, slot->dmamap,
BUS_DMASYNC_PREWRITE);
}
/* Interrupt aggregation: Mask border interrupt
* for the last page. */
if (left == DMA_BLOCK_SIZE) {
slot->intmask &= ~SDHCI_INT_DMA_END;
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
}
/* Restart DMA. */
WR4(slot, SDHCI_DMA_ADDRESS, slot->paddr);
}
/* We have got all data. */
if (intmask & SDHCI_INT_DATA_END) {
if (slot->flags & PLATFORM_DATA_STARTED) {
slot->flags &= ~PLATFORM_DATA_STARTED;
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
} else
sdhci_finish_data(slot);
}
done:
if (slot->curcmd != NULL && slot->curcmd->error != 0) {
if (slot->flags & PLATFORM_DATA_STARTED) {
slot->flags &= ~PLATFORM_DATA_STARTED;
SDHCI_PLATFORM_FINISH_TRANSFER(slot->bus, slot);
} else
sdhci_finish_data(slot);
}
}
static void
sdhci_acmd_irq(struct sdhci_slot *slot)
{
uint16_t err;
err = RD4(slot, SDHCI_ACMD12_ERR);
if (!slot->curcmd) {
slot_printf(slot, "Got AutoCMD12 error 0x%04x, but "
"there is no active command.\n", err);
sdhci_dumpregs(slot);
return;
}
slot_printf(slot, "Got AutoCMD12 error 0x%04x\n", err);
sdhci_reset(slot, SDHCI_RESET_CMD);
}
void
sdhci_generic_intr(struct sdhci_slot *slot)
{
uint32_t intmask, present;
SDHCI_LOCK(slot);
/* Read slot interrupt status. */
intmask = RD4(slot, SDHCI_INT_STATUS);
if (intmask == 0 || intmask == 0xffffffff) {
SDHCI_UNLOCK(slot);
return;
}
if (sdhci_debug > 2)
slot_printf(slot, "Interrupt %#x\n", intmask);
/* Handle card presence interrupts. */
if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
present = (intmask & SDHCI_INT_CARD_INSERT) != 0;
slot->intmask &=
~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
slot->intmask |= present ? SDHCI_INT_CARD_REMOVE :
SDHCI_INT_CARD_INSERT;
WR4(slot, SDHCI_INT_ENABLE, slot->intmask);
WR4(slot, SDHCI_SIGNAL_ENABLE, slot->intmask);
WR4(slot, SDHCI_INT_STATUS, intmask &
(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE));
sdhci_handle_card_present_locked(slot, present);
intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
}
/* Handle command interrupts. */
if (intmask & SDHCI_INT_CMD_MASK) {
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_CMD_MASK);
sdhci_cmd_irq(slot, intmask & SDHCI_INT_CMD_MASK);
}
/* Handle data interrupts. */
if (intmask & SDHCI_INT_DATA_MASK) {
WR4(slot, SDHCI_INT_STATUS, intmask & SDHCI_INT_DATA_MASK);
/* Don't call data_irq in case of errored command. */
if ((intmask & SDHCI_INT_CMD_ERROR_MASK) == 0)
sdhci_data_irq(slot, intmask & SDHCI_INT_DATA_MASK);
}
/* Handle AutoCMD12 error interrupt. */
if (intmask & SDHCI_INT_ACMD12ERR) {
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_ACMD12ERR);
sdhci_acmd_irq(slot);
}
intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
intmask &= ~SDHCI_INT_ACMD12ERR;
intmask &= ~SDHCI_INT_ERROR;
/* Handle bus power interrupt. */
if (intmask & SDHCI_INT_BUS_POWER) {
WR4(slot, SDHCI_INT_STATUS, SDHCI_INT_BUS_POWER);
slot_printf(slot,
"Card is consuming too much power!\n");
intmask &= ~SDHCI_INT_BUS_POWER;
}
/* Handle card interrupt. */
if (intmask & SDHCI_INT_CARD_INT) {
}
/* The rest is unknown. */
if (intmask) {
WR4(slot, SDHCI_INT_STATUS, intmask);
slot_printf(slot, "Unexpected interrupt 0x%08x.\n",
intmask);
sdhci_dumpregs(slot);
}
SDHCI_UNLOCK(slot);
}
int
sdhci_generic_read_ivar(device_t bus, device_t child, int which,
uintptr_t *result)
{
struct sdhci_slot *slot = device_get_ivars(child);
switch (which) {
default:
return (EINVAL);
case MMCBR_IVAR_BUS_MODE:
*result = slot->host.ios.bus_mode;
break;
case MMCBR_IVAR_BUS_WIDTH:
*result = slot->host.ios.bus_width;
break;
case MMCBR_IVAR_CHIP_SELECT:
*result = slot->host.ios.chip_select;
break;
case MMCBR_IVAR_CLOCK:
*result = slot->host.ios.clock;
break;
case MMCBR_IVAR_F_MIN:
*result = slot->host.f_min;
break;
case MMCBR_IVAR_F_MAX:
*result = slot->host.f_max;
break;
case MMCBR_IVAR_HOST_OCR:
*result = slot->host.host_ocr;
break;
case MMCBR_IVAR_MODE:
*result = slot->host.mode;
break;
case MMCBR_IVAR_OCR:
*result = slot->host.ocr;
break;
case MMCBR_IVAR_POWER_MODE:
*result = slot->host.ios.power_mode;
break;
case MMCBR_IVAR_VDD:
*result = slot->host.ios.vdd;
break;
case MMCBR_IVAR_VCCQ:
*result = slot->host.ios.vccq;
break;
case MMCBR_IVAR_CAPS:
*result = slot->host.caps;
break;
case MMCBR_IVAR_TIMING:
*result = slot->host.ios.timing;
break;
case MMCBR_IVAR_MAX_DATA:
*result = 65535;
break;
case MMCBR_IVAR_MAX_BUSY_TIMEOUT:
/*
* Currently, sdhci_start_data() hardcodes 1 s for all CMDs.
*/
*result = 1000000;
break;
}
return (0);
}
int
sdhci_generic_write_ivar(device_t bus, device_t child, int which,
uintptr_t value)
{
struct sdhci_slot *slot = device_get_ivars(child);
uint32_t clock, max_clock;
int i;
slot_printf(slot, "sdhci_generic_write_ivar, var=%d\n", which);
switch (which) {
default:
return (EINVAL);
case MMCBR_IVAR_BUS_MODE:
slot->host.ios.bus_mode = value;
break;
case MMCBR_IVAR_BUS_WIDTH:
slot->host.ios.bus_width = value;
break;
case MMCBR_IVAR_CHIP_SELECT:
slot->host.ios.chip_select = value;
break;
case MMCBR_IVAR_CLOCK:
if (value > 0) {
max_clock = slot->max_clk;
clock = max_clock;
if (slot->version < SDHCI_SPEC_300) {
for (i = 0; i < SDHCI_200_MAX_DIVIDER;
i <<= 1) {
if (clock <= value)
break;
clock >>= 1;
}
} else {
for (i = 0; i < SDHCI_300_MAX_DIVIDER;
i += 2) {
if (clock <= value)
break;
clock = max_clock / (i + 2);
}
}
slot->host.ios.clock = clock;
} else
slot->host.ios.clock = 0;
break;
case MMCBR_IVAR_MODE:
slot->host.mode = value;
break;
case MMCBR_IVAR_OCR:
slot->host.ocr = value;
break;
case MMCBR_IVAR_POWER_MODE:
slot->host.ios.power_mode = value;
break;
case MMCBR_IVAR_VDD:
slot->host.ios.vdd = value;
break;
case MMCBR_IVAR_VCCQ:
slot->host.ios.vccq = value;
break;
case MMCBR_IVAR_TIMING:
slot->host.ios.timing = value;
break;
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);
}
/* CAM-related functions */
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
void
sdhci_cam_start_slot(struct sdhci_slot *slot)
{
if ((slot->devq = cam_simq_alloc(1)) == NULL) {
goto fail;
}
mtx_init(&slot->sim_mtx, "sdhcisim", NULL, MTX_DEF);
slot->sim = cam_sim_alloc(sdhci_cam_action, sdhci_cam_poll,
"sdhci_slot", slot, device_get_unit(slot->bus),
&slot->sim_mtx, 1, 1, slot->devq);
if (slot->sim == NULL) {
cam_simq_free(slot->devq);
slot_printf(slot, "cannot allocate CAM SIM\n");
goto fail;
}
mtx_lock(&slot->sim_mtx);
if (xpt_bus_register(slot->sim, slot->bus, 0) != 0) {
slot_printf(slot,
"cannot register SCSI pass-through bus\n");
cam_sim_free(slot->sim, FALSE);
cam_simq_free(slot->devq);
mtx_unlock(&slot->sim_mtx);
goto fail;
}
mtx_unlock(&slot->sim_mtx);
/* End CAM-specific init */
slot->card_present = 0;
sdhci_card_task(slot, 0);
return;
fail:
if (slot->sim != NULL) {
mtx_lock(&slot->sim_mtx);
xpt_bus_deregister(cam_sim_path(slot->sim));
cam_sim_free(slot->sim, FALSE);
mtx_unlock(&slot->sim_mtx);
}
if (slot->devq != NULL)
cam_simq_free(slot->devq);
}
static void
sdhci_cam_handle_mmcio(struct cam_sim *sim, union ccb *ccb)
{
struct sdhci_slot *slot;
slot = cam_sim_softc(sim);
sdhci_cam_request(slot, ccb);
}
void
sdhci_cam_action(struct cam_sim *sim, union ccb *ccb)
{
struct sdhci_slot *slot;
slot = cam_sim_softc(sim);
if (slot == NULL) {
ccb->ccb_h.status = CAM_SEL_TIMEOUT;
xpt_done(ccb);
return;
}
mtx_assert(&slot->sim_mtx, MA_OWNED);
switch (ccb->ccb_h.func_code) {
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi;
cpi = &ccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = 0;
cpi->target_sprt = 0;
cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN;
cpi->hba_eng_cnt = 0;
cpi->max_target = 0;
cpi->max_lun = 0;
cpi->initiator_id = 1;
cpi->maxio = MAXPHYS;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "Deglitch Networks", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 100; /* XXX WTF? */
cpi->protocol = PROTO_MMCSD;
cpi->protocol_version = SCSI_REV_0;
cpi->transport = XPORT_MMCSD;
cpi->transport_version = 0;
cpi->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts = &ccb->cts;
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_GET_TRAN_SETTINGS\n");
cts->protocol = PROTO_MMCSD;
cts->protocol_version = 1;
cts->transport = XPORT_MMCSD;
cts->transport_version = 1;
cts->xport_specific.valid = 0;
cts->proto_specific.mmc.host_ocr = slot->host.host_ocr;
cts->proto_specific.mmc.host_f_min = slot->host.f_min;
cts->proto_specific.mmc.host_f_max = slot->host.f_max;
cts->proto_specific.mmc.host_caps = slot->host.caps;
memcpy(&cts->proto_specific.mmc.ios, &slot->host.ios, sizeof(struct mmc_ios));
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_SET_TRAN_SETTINGS:
{
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_SET_TRAN_SETTINGS\n");
sdhci_cam_settran_settings(slot, ccb);
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_RESET_BUS:
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_RESET_BUS, ACK it...\n");
ccb->ccb_h.status = CAM_REQ_CMP;
break;
case XPT_MMC_IO:
/*
* Here is the HW-dependent part of
* sending the command to the underlying h/w
* At some point in the future an interrupt comes.
* Then the request will be marked as completed.
*/
if (sdhci_debug > 1)
slot_printf(slot, "Got XPT_MMC_IO\n");
ccb->ccb_h.status = CAM_REQ_INPROG;
sdhci_cam_handle_mmcio(sim, ccb);
return;
/* NOTREACHED */
break;
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
break;
}
xpt_done(ccb);
return;
}
void
sdhci_cam_poll(struct cam_sim *sim)
{
return;
}
int sdhci_cam_get_possible_host_clock(struct sdhci_slot *slot, int proposed_clock) {
int max_clock, clock, i;
if (proposed_clock == 0)
return 0;
max_clock = slot->max_clk;
clock = max_clock;
if (slot->version < SDHCI_SPEC_300) {
for (i = 0; i < SDHCI_200_MAX_DIVIDER;
i <<= 1) {
if (clock <= proposed_clock)
break;
clock >>= 1;
}
} else {
for (i = 0; i < SDHCI_300_MAX_DIVIDER;
i += 2) {
if (clock <= proposed_clock)
break;
clock = max_clock / (i + 2);
}
}
return clock;
}
int
sdhci_cam_settran_settings(struct sdhci_slot *slot, union ccb *ccb)
{
struct mmc_ios *ios;
struct mmc_ios *new_ios;
struct ccb_trans_settings_mmc *cts;
ios = &slot->host.ios;
cts = &ccb->cts.proto_specific.mmc;
new_ios = &cts->ios;
/* Update only requested fields */
if (cts->ios_valid & MMC_CLK) {
ios->clock = sdhci_cam_get_possible_host_clock(slot, new_ios->clock);
slot_printf(slot, "Clock => %d\n", ios->clock);
}
if (cts->ios_valid & MMC_VDD) {
ios->vdd = new_ios->vdd;
slot_printf(slot, "VDD => %d\n", ios->vdd);
}
if (cts->ios_valid & MMC_CS) {
ios->chip_select = new_ios->chip_select;
slot_printf(slot, "CS => %d\n", ios->chip_select);
}
if (cts->ios_valid & MMC_BW) {
ios->bus_width = new_ios->bus_width;
slot_printf(slot, "Bus width => %d\n", ios->bus_width);
}
if (cts->ios_valid & MMC_PM) {
ios->power_mode = new_ios->power_mode;
slot_printf(slot, "Power mode => %d\n", ios->power_mode);
}
if (cts->ios_valid & MMC_BT) {
ios->timing = new_ios->timing;
slot_printf(slot, "Timing => %d\n", ios->timing);
}
if (cts->ios_valid & MMC_BM) {
ios->bus_mode = new_ios->bus_mode;
slot_printf(slot, "Bus mode => %d\n", ios->bus_mode);
}
/* XXX Provide a way to call a chip-specific IOS update, required for TI */
return (sdhci_cam_update_ios(slot));
}
int
sdhci_cam_update_ios(struct sdhci_slot *slot)
{
struct mmc_ios *ios = &slot->host.ios;
slot_printf(slot, "%s: power_mode=%d, clk=%d, bus_width=%d, timing=%d\n",
__func__, ios->power_mode, ios->clock, ios->bus_width, ios->timing);
SDHCI_LOCK(slot);
/* Do full reset on bus power down to clear from any state. */
if (ios->power_mode == power_off) {
WR4(slot, SDHCI_SIGNAL_ENABLE, 0);
sdhci_init(slot);
}
/* Configure the bus. */
sdhci_set_clock(slot, ios->clock);
sdhci_set_power(slot, (ios->power_mode == power_off) ? 0 : ios->vdd);
if (ios->bus_width == bus_width_8) {
slot->hostctrl |= SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_4) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl |= SDHCI_CTRL_4BITBUS;
} else if (ios->bus_width == bus_width_1) {
slot->hostctrl &= ~SDHCI_CTRL_8BITBUS;
slot->hostctrl &= ~SDHCI_CTRL_4BITBUS;
} else {
panic("Invalid bus width: %d", ios->bus_width);
}
if (ios->timing == bus_timing_hs &&
!(slot->quirks & SDHCI_QUIRK_DONT_SET_HISPD_BIT))
slot->hostctrl |= SDHCI_CTRL_HISPD;
else
slot->hostctrl &= ~SDHCI_CTRL_HISPD;
WR1(slot, SDHCI_HOST_CONTROL, slot->hostctrl);
/* Some controllers like reset after bus changes. */
if(slot->quirks & SDHCI_QUIRK_RESET_ON_IOS)
sdhci_reset(slot, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
SDHCI_UNLOCK(slot);
return (0);
}
int
sdhci_cam_request(struct sdhci_slot *slot, union ccb *ccb)
{
struct ccb_mmcio *mmcio;
mmcio = &ccb->mmcio;
SDHCI_LOCK(slot);
/* if (slot->req != NULL) {
SDHCI_UNLOCK(slot);
return (EBUSY);
}
*/
if (sdhci_debug > 1) {
slot_printf(slot, "CMD%u arg %#x flags %#x dlen %u dflags %#x\n",
mmcio->cmd.opcode, mmcio->cmd.arg, mmcio->cmd.flags,
mmcio->cmd.data != NULL ? (unsigned int) mmcio->cmd.data->len : 0,
mmcio->cmd.data != NULL ? mmcio->cmd.data->flags: 0);
}
if (mmcio->cmd.data != NULL) {
if (mmcio->cmd.data->len == 0 || mmcio->cmd.data->flags == 0)
panic("data->len = %d, data->flags = %d -- something is b0rked",
(int)mmcio->cmd.data->len, mmcio->cmd.data->flags);
}
slot->ccb = ccb;
slot->flags = 0;
sdhci_start(slot);
SDHCI_UNLOCK(slot);
if (dumping) {
while (slot->ccb != NULL) {
sdhci_generic_intr(slot);
DELAY(10);
}
}
return (0);
}
MODULE_VERSION(sdhci, 1);
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