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7302dcd60b
xemu/hw/sd/sdhci.c
Kevin O'Connor 7302dcd60b sdhci: Add "sysbus" to sdhci QOM types and methods 
Update the sdhci sysbus QOM types and methods so that sysbus is in
their name.  This is in preparation for adding PCI versions of these
types and methods.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15 17:34:44 +01:00

1272 lines
42 KiB
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/*
* SD Association Host Standard Specification v2.0 controller emulation
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Mitsyanko Igor <i.mitsyanko@samsung.com>
* Peter A.G. Crosthwaite <peter.crosthwaite@petalogix.com>
*
* Based on MMC controller for Samsung S5PC1xx-based board emulation
* by Alexey Merkulov and Vladimir Monakhov.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw/hw.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "sysemu/dma.h"
#include "qemu/timer.h"
#include "qemu/bitops.h"
#include "sdhci.h"
/* host controller debug messages */
#ifndef SDHC_DEBUG
#define SDHC_DEBUG 0
#endif
#if SDHC_DEBUG == 0
#define DPRINT_L1(fmt, args...) do { } while (0)
#define DPRINT_L2(fmt, args...) do { } while (0)
#define ERRPRINT(fmt, args...) do { } while (0)
#elif SDHC_DEBUG == 1
#define DPRINT_L1(fmt, args...) \
do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
#define DPRINT_L2(fmt, args...) do { } while (0)
#define ERRPRINT(fmt, args...) \
do {fprintf(stderr, "QEMU SDHC ERROR: "fmt, ## args); } while (0)
#else
#define DPRINT_L1(fmt, args...) \
do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
#define DPRINT_L2(fmt, args...) \
do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
#define ERRPRINT(fmt, args...) \
do {fprintf(stderr, "QEMU SDHC ERROR: "fmt, ## args); } while (0)
#endif
/* Default SD/MMC host controller features information, which will be
* presented in CAPABILITIES register of generic SD host controller at reset.
* If not stated otherwise:
* 0 - not supported, 1 - supported, other - prohibited.
*/
#define SDHC_CAPAB_64BITBUS 0ul /* 64-bit System Bus Support */
#define SDHC_CAPAB_18V 1ul /* Voltage support 1.8v */
#define SDHC_CAPAB_30V 0ul /* Voltage support 3.0v */
#define SDHC_CAPAB_33V 1ul /* Voltage support 3.3v */
#define SDHC_CAPAB_SUSPRESUME 0ul /* Suspend/resume support */
#define SDHC_CAPAB_SDMA 1ul /* SDMA support */
#define SDHC_CAPAB_HIGHSPEED 1ul /* High speed support */
#define SDHC_CAPAB_ADMA1 1ul /* ADMA1 support */
#define SDHC_CAPAB_ADMA2 1ul /* ADMA2 support */
/* Maximum host controller R/W buffers size
* Possible values: 512, 1024, 2048 bytes */
#define SDHC_CAPAB_MAXBLOCKLENGTH 512ul
/* Maximum clock frequency for SDclock in MHz
* value in range 10-63 MHz, 0 - not defined */
#define SDHC_CAPAB_BASECLKFREQ 52ul
#define SDHC_CAPAB_TOUNIT 1ul /* Timeout clock unit 0 - kHz, 1 - MHz */
/* Timeout clock frequency 1-63, 0 - not defined */
#define SDHC_CAPAB_TOCLKFREQ 52ul
/* Now check all parameters and calculate CAPABILITIES REGISTER value */
#if SDHC_CAPAB_64BITBUS > 1 || SDHC_CAPAB_18V > 1 || SDHC_CAPAB_30V > 1 || \
SDHC_CAPAB_33V > 1 || SDHC_CAPAB_SUSPRESUME > 1 || SDHC_CAPAB_SDMA > 1 || \
SDHC_CAPAB_HIGHSPEED > 1 || SDHC_CAPAB_ADMA2 > 1 || SDHC_CAPAB_ADMA1 > 1 ||\
SDHC_CAPAB_TOUNIT > 1
#error Capabilities features can have value 0 or 1 only!
#endif
#if SDHC_CAPAB_MAXBLOCKLENGTH == 512
#define MAX_BLOCK_LENGTH 0ul
#elif SDHC_CAPAB_MAXBLOCKLENGTH == 1024
#define MAX_BLOCK_LENGTH 1ul
#elif SDHC_CAPAB_MAXBLOCKLENGTH == 2048
#define MAX_BLOCK_LENGTH 2ul
#else
#error Max host controller block size can have value 512, 1024 or 2048 only!
#endif
#if (SDHC_CAPAB_BASECLKFREQ > 0 && SDHC_CAPAB_BASECLKFREQ < 10) || \
SDHC_CAPAB_BASECLKFREQ > 63
#error SDclock frequency can have value in range 0, 10-63 only!
#endif
#if SDHC_CAPAB_TOCLKFREQ > 63
#error Timeout clock frequency can have value in range 0-63 only!
#endif
#define SDHC_CAPAB_REG_DEFAULT \
((SDHC_CAPAB_64BITBUS << 28) | (SDHC_CAPAB_18V << 26) | \
(SDHC_CAPAB_30V << 25) | (SDHC_CAPAB_33V << 24) | \
(SDHC_CAPAB_SUSPRESUME << 23) | (SDHC_CAPAB_SDMA << 22) | \
(SDHC_CAPAB_HIGHSPEED << 21) | (SDHC_CAPAB_ADMA1 << 20) | \
(SDHC_CAPAB_ADMA2 << 19) | (MAX_BLOCK_LENGTH << 16) | \
(SDHC_CAPAB_BASECLKFREQ << 8) | (SDHC_CAPAB_TOUNIT << 7) | \
(SDHC_CAPAB_TOCLKFREQ))
#define MASKED_WRITE(reg, mask, val) (reg = (reg & (mask)) | (val))
static uint8_t sdhci_slotint(SDHCIState *s)
{
return (s->norintsts & s->norintsigen) || (s->errintsts & s->errintsigen) ||
((s->norintsts & SDHC_NIS_INSERT) && (s->wakcon & SDHC_WKUP_ON_INS)) ||
((s->norintsts & SDHC_NIS_REMOVE) && (s->wakcon & SDHC_WKUP_ON_RMV));
}
static inline void sdhci_update_irq(SDHCIState *s)
{
qemu_set_irq(s->irq, sdhci_slotint(s));
}
static void sdhci_raise_insertion_irq(void *opaque)
{
SDHCIState *s = (SDHCIState *)opaque;
if (s->norintsts & SDHC_NIS_REMOVE) {
timer_mod(s->insert_timer,
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + SDHC_INSERTION_DELAY);
} else {
s->prnsts = 0x1ff0000;
if (s->norintstsen & SDHC_NISEN_INSERT) {
s->norintsts |= SDHC_NIS_INSERT;
}
sdhci_update_irq(s);
}
}
static void sdhci_insert_eject_cb(void *opaque, int irq, int level)
{
SDHCIState *s = (SDHCIState *)opaque;
DPRINT_L1("Card state changed: %s!\n", level ? "insert" : "eject");
if ((s->norintsts & SDHC_NIS_REMOVE) && level) {
/* Give target some time to notice card ejection */
timer_mod(s->insert_timer,
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + SDHC_INSERTION_DELAY);
} else {
if (level) {
s->prnsts = 0x1ff0000;
if (s->norintstsen & SDHC_NISEN_INSERT) {
s->norintsts |= SDHC_NIS_INSERT;
}
} else {
s->prnsts = 0x1fa0000;
s->pwrcon &= ~SDHC_POWER_ON;
s->clkcon &= ~SDHC_CLOCK_SDCLK_EN;
if (s->norintstsen & SDHC_NISEN_REMOVE) {
s->norintsts |= SDHC_NIS_REMOVE;
}
}
sdhci_update_irq(s);
}
}
static void sdhci_card_readonly_cb(void *opaque, int irq, int level)
{
SDHCIState *s = (SDHCIState *)opaque;
if (level) {
s->prnsts &= ~SDHC_WRITE_PROTECT;
} else {
/* Write enabled */
s->prnsts |= SDHC_WRITE_PROTECT;
}
}
static void sdhci_reset(SDHCIState *s)
{
timer_del(s->insert_timer);
timer_del(s->transfer_timer);
/* Set all registers to 0. Capabilities registers are not cleared
* and assumed to always preserve their value, given to them during
* initialization */
memset(&s->sdmasysad, 0, (uintptr_t)&s->capareg - (uintptr_t)&s->sdmasysad);
sd_set_cb(s->card, s->ro_cb, s->eject_cb);
s->data_count = 0;
s->stopped_state = sdhc_not_stopped;
}
static void sdhci_data_transfer(void *opaque);
static void sdhci_send_command(SDHCIState *s)
{
SDRequest request;
uint8_t response[16];
int rlen;
s->errintsts = 0;
s->acmd12errsts = 0;
request.cmd = s->cmdreg >> 8;
request.arg = s->argument;
DPRINT_L1("sending CMD%u ARG[0x%08x]\n", request.cmd, request.arg);
rlen = sd_do_command(s->card, &request, response);
if (s->cmdreg & SDHC_CMD_RESPONSE) {
if (rlen == 4) {
s->rspreg[0] = (response[0] << 24) | (response[1] << 16) |
(response[2] << 8) | response[3];
s->rspreg[1] = s->rspreg[2] = s->rspreg[3] = 0;
DPRINT_L1("Response: RSPREG[31..0]=0x%08x\n", s->rspreg[0]);
} else if (rlen == 16) {
s->rspreg[0] = (response[11] << 24) | (response[12] << 16) |
(response[13] << 8) | response[14];
s->rspreg[1] = (response[7] << 24) | (response[8] << 16) |
(response[9] << 8) | response[10];
s->rspreg[2] = (response[3] << 24) | (response[4] << 16) |
(response[5] << 8) | response[6];
s->rspreg[3] = (response[0] << 16) | (response[1] << 8) |
response[2];
DPRINT_L1("Response received:\n RSPREG[127..96]=0x%08x, RSPREG[95.."
"64]=0x%08x,\n RSPREG[63..32]=0x%08x, RSPREG[31..0]=0x%08x\n",
s->rspreg[3], s->rspreg[2], s->rspreg[1], s->rspreg[0]);
} else {
ERRPRINT("Timeout waiting for command response\n");
if (s->errintstsen & SDHC_EISEN_CMDTIMEOUT) {
s->errintsts |= SDHC_EIS_CMDTIMEOUT;
s->norintsts |= SDHC_NIS_ERR;
}
}
if ((s->norintstsen & SDHC_NISEN_TRSCMP) &&
(s->cmdreg & SDHC_CMD_RESPONSE) == SDHC_CMD_RSP_WITH_BUSY) {
s->norintsts |= SDHC_NIS_TRSCMP;
}
} else if (rlen != 0 && (s->errintstsen & SDHC_EISEN_CMDIDX)) {
s->errintsts |= SDHC_EIS_CMDIDX;
s->norintsts |= SDHC_NIS_ERR;
}
if (s->norintstsen & SDHC_NISEN_CMDCMP) {
s->norintsts |= SDHC_NIS_CMDCMP;
}
sdhci_update_irq(s);
if (s->blksize && (s->cmdreg & SDHC_CMD_DATA_PRESENT)) {
s->data_count = 0;
sdhci_data_transfer(s);
}
}
static void sdhci_end_transfer(SDHCIState *s)
{
/* Automatically send CMD12 to stop transfer if AutoCMD12 enabled */
if ((s->trnmod & SDHC_TRNS_ACMD12) != 0) {
SDRequest request;
uint8_t response[16];
request.cmd = 0x0C;
request.arg = 0;
DPRINT_L1("Automatically issue CMD%d %08x\n", request.cmd, request.arg);
sd_do_command(s->card, &request, response);
/* Auto CMD12 response goes to the upper Response register */
s->rspreg[3] = (response[0] << 24) | (response[1] << 16) |
(response[2] << 8) | response[3];
}
s->prnsts &= ~(SDHC_DOING_READ | SDHC_DOING_WRITE |
SDHC_DAT_LINE_ACTIVE | SDHC_DATA_INHIBIT |
SDHC_SPACE_AVAILABLE | SDHC_DATA_AVAILABLE);
if (s->norintstsen & SDHC_NISEN_TRSCMP) {
s->norintsts |= SDHC_NIS_TRSCMP;
}
sdhci_update_irq(s);
}
/*
* Programmed i/o data transfer
*/
/* Fill host controller's read buffer with BLKSIZE bytes of data from card */
static void sdhci_read_block_from_card(SDHCIState *s)
{
int index = 0;
if ((s->trnmod & SDHC_TRNS_MULTI) &&
(s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0)) {
return;
}
for (index = 0; index < (s->blksize & 0x0fff); index++) {
s->fifo_buffer[index] = sd_read_data(s->card);
}
/* New data now available for READ through Buffer Port Register */
s->prnsts |= SDHC_DATA_AVAILABLE;
if (s->norintstsen & SDHC_NISEN_RBUFRDY) {
s->norintsts |= SDHC_NIS_RBUFRDY;
}
/* Clear DAT line active status if that was the last block */
if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
((s->trnmod & SDHC_TRNS_MULTI) && s->blkcnt == 1)) {
s->prnsts &= ~SDHC_DAT_LINE_ACTIVE;
}
/* If stop at block gap request was set and it's not the last block of
* data - generate Block Event interrupt */
if (s->stopped_state == sdhc_gap_read && (s->trnmod & SDHC_TRNS_MULTI) &&
s->blkcnt != 1) {
s->prnsts &= ~SDHC_DAT_LINE_ACTIVE;
if (s->norintstsen & SDHC_EISEN_BLKGAP) {
s->norintsts |= SDHC_EIS_BLKGAP;
}
}
sdhci_update_irq(s);
}
/* Read @size byte of data from host controller @s BUFFER DATA PORT register */
static uint32_t sdhci_read_dataport(SDHCIState *s, unsigned size)
{
uint32_t value = 0;
int i;
/* first check that a valid data exists in host controller input buffer */
if ((s->prnsts & SDHC_DATA_AVAILABLE) == 0) {
ERRPRINT("Trying to read from empty buffer\n");
return 0;
}
for (i = 0; i < size; i++) {
value |= s->fifo_buffer[s->data_count] << i * 8;
s->data_count++;
/* check if we've read all valid data (blksize bytes) from buffer */
if ((s->data_count) >= (s->blksize & 0x0fff)) {
DPRINT_L2("All %u bytes of data have been read from input buffer\n",
s->data_count);
s->prnsts &= ~SDHC_DATA_AVAILABLE; /* no more data in a buffer */
s->data_count = 0; /* next buff read must start at position [0] */
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
}
/* if that was the last block of data */
if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
((s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0)) ||
/* stop at gap request */
(s->stopped_state == sdhc_gap_read &&
!(s->prnsts & SDHC_DAT_LINE_ACTIVE))) {
sdhci_end_transfer(s);
} else { /* if there are more data, read next block from card */
sdhci_read_block_from_card(s);
}
break;
}
}
return value;
}
/* Write data from host controller FIFO to card */
static void sdhci_write_block_to_card(SDHCIState *s)
{
int index = 0;
if (s->prnsts & SDHC_SPACE_AVAILABLE) {
if (s->norintstsen & SDHC_NISEN_WBUFRDY) {
s->norintsts |= SDHC_NIS_WBUFRDY;
}
sdhci_update_irq(s);
return;
}
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
if (s->blkcnt == 0) {
return;
} else {
s->blkcnt--;
}
}
for (index = 0; index < (s->blksize & 0x0fff); index++) {
sd_write_data(s->card, s->fifo_buffer[index]);
}
/* Next data can be written through BUFFER DATORT register */
s->prnsts |= SDHC_SPACE_AVAILABLE;
/* Finish transfer if that was the last block of data */
if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
((s->trnmod & SDHC_TRNS_MULTI) &&
(s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0))) {
sdhci_end_transfer(s);
} else if (s->norintstsen & SDHC_NISEN_WBUFRDY) {
s->norintsts |= SDHC_NIS_WBUFRDY;
}
/* Generate Block Gap Event if requested and if not the last block */
if (s->stopped_state == sdhc_gap_write && (s->trnmod & SDHC_TRNS_MULTI) &&
s->blkcnt > 0) {
s->prnsts &= ~SDHC_DOING_WRITE;
if (s->norintstsen & SDHC_EISEN_BLKGAP) {
s->norintsts |= SDHC_EIS_BLKGAP;
}
sdhci_end_transfer(s);
}
sdhci_update_irq(s);
}
/* Write @size bytes of @value data to host controller @s Buffer Data Port
* register */
static void sdhci_write_dataport(SDHCIState *s, uint32_t value, unsigned size)
{
unsigned i;
/* Check that there is free space left in a buffer */
if (!(s->prnsts & SDHC_SPACE_AVAILABLE)) {
ERRPRINT("Can't write to data buffer: buffer full\n");
return;
}
for (i = 0; i < size; i++) {
s->fifo_buffer[s->data_count] = value & 0xFF;
s->data_count++;
value >>= 8;
if (s->data_count >= (s->blksize & 0x0fff)) {
DPRINT_L2("write buffer filled with %u bytes of data\n",
s->data_count);
s->data_count = 0;
s->prnsts &= ~SDHC_SPACE_AVAILABLE;
if (s->prnsts & SDHC_DOING_WRITE) {
sdhci_write_block_to_card(s);
}
}
}
}
/*
* Single DMA data transfer
*/
/* Multi block SDMA transfer */
static void sdhci_sdma_transfer_multi_blocks(SDHCIState *s)
{
bool page_aligned = false;
unsigned int n, begin;
const uint16_t block_size = s->blksize & 0x0fff;
uint32_t boundary_chk = 1 << (((s->blksize & 0xf000) >> 12) + 12);
uint32_t boundary_count = boundary_chk - (s->sdmasysad % boundary_chk);
/* XXX: Some sd/mmc drivers (for example, u-boot-slp) do not account for
* possible stop at page boundary if initial address is not page aligned,
* allow them to work properly */
if ((s->sdmasysad % boundary_chk) == 0) {
page_aligned = true;
}
if (s->trnmod & SDHC_TRNS_READ) {
s->prnsts |= SDHC_DOING_READ | SDHC_DATA_INHIBIT |
SDHC_DAT_LINE_ACTIVE;
while (s->blkcnt) {
if (s->data_count == 0) {
for (n = 0; n < block_size; n++) {
s->fifo_buffer[n] = sd_read_data(s->card);
}
}
begin = s->data_count;
if (((boundary_count + begin) < block_size) && page_aligned) {
s->data_count = boundary_count + begin;
boundary_count = 0;
} else {
s->data_count = block_size;
boundary_count -= block_size - begin;
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
}
}
dma_memory_write(&address_space_memory, s->sdmasysad,
&s->fifo_buffer[begin], s->data_count - begin);
s->sdmasysad += s->data_count - begin;
if (s->data_count == block_size) {
s->data_count = 0;
}
if (page_aligned && boundary_count == 0) {
break;
}
}
} else {
s->prnsts |= SDHC_DOING_WRITE | SDHC_DATA_INHIBIT |
SDHC_DAT_LINE_ACTIVE;
while (s->blkcnt) {
begin = s->data_count;
if (((boundary_count + begin) < block_size) && page_aligned) {
s->data_count = boundary_count + begin;
boundary_count = 0;
} else {
s->data_count = block_size;
boundary_count -= block_size - begin;
}
dma_memory_read(&address_space_memory, s->sdmasysad,
&s->fifo_buffer[begin], s->data_count);
s->sdmasysad += s->data_count - begin;
if (s->data_count == block_size) {
for (n = 0; n < block_size; n++) {
sd_write_data(s->card, s->fifo_buffer[n]);
}
s->data_count = 0;
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
}
}
if (page_aligned && boundary_count == 0) {
break;
}
}
}
if (s->blkcnt == 0) {
sdhci_end_transfer(s);
} else {
if (s->norintstsen & SDHC_NISEN_DMA) {
s->norintsts |= SDHC_NIS_DMA;
}
sdhci_update_irq(s);
}
}
/* single block SDMA transfer */
static void sdhci_sdma_transfer_single_block(SDHCIState *s)
{
int n;
uint32_t datacnt = s->blksize & 0x0fff;
if (s->trnmod & SDHC_TRNS_READ) {
for (n = 0; n < datacnt; n++) {
s->fifo_buffer[n] = sd_read_data(s->card);
}
dma_memory_write(&address_space_memory, s->sdmasysad, s->fifo_buffer,
datacnt);
} else {
dma_memory_read(&address_space_memory, s->sdmasysad, s->fifo_buffer,
datacnt);
for (n = 0; n < datacnt; n++) {
sd_write_data(s->card, s->fifo_buffer[n]);
}
}
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
}
sdhci_end_transfer(s);
}
typedef struct ADMADescr {
hwaddr addr;
uint16_t length;
uint8_t attr;
uint8_t incr;
} ADMADescr;
static void get_adma_description(SDHCIState *s, ADMADescr *dscr)
{
uint32_t adma1 = 0;
uint64_t adma2 = 0;
hwaddr entry_addr = (hwaddr)s->admasysaddr;
switch (SDHC_DMA_TYPE(s->hostctl)) {
case SDHC_CTRL_ADMA2_32:
dma_memory_read(&address_space_memory, entry_addr, (uint8_t *)&adma2,
sizeof(adma2));
adma2 = le64_to_cpu(adma2);
/* The spec does not specify endianness of descriptor table.
* We currently assume that it is LE.
*/
dscr->addr = (hwaddr)extract64(adma2, 32, 32) & ~0x3ull;
dscr->length = (uint16_t)extract64(adma2, 16, 16);
dscr->attr = (uint8_t)extract64(adma2, 0, 7);
dscr->incr = 8;
break;
case SDHC_CTRL_ADMA1_32:
dma_memory_read(&address_space_memory, entry_addr, (uint8_t *)&adma1,
sizeof(adma1));
adma1 = le32_to_cpu(adma1);
dscr->addr = (hwaddr)(adma1 & 0xFFFFF000);
dscr->attr = (uint8_t)extract32(adma1, 0, 7);
dscr->incr = 4;
if ((dscr->attr & SDHC_ADMA_ATTR_ACT_MASK) == SDHC_ADMA_ATTR_SET_LEN) {
dscr->length = (uint16_t)extract32(adma1, 12, 16);
} else {
dscr->length = 4096;
}
break;
case SDHC_CTRL_ADMA2_64:
dma_memory_read(&address_space_memory, entry_addr,
(uint8_t *)(&dscr->attr), 1);
dma_memory_read(&address_space_memory, entry_addr + 2,
(uint8_t *)(&dscr->length), 2);
dscr->length = le16_to_cpu(dscr->length);
dma_memory_read(&address_space_memory, entry_addr + 4,
(uint8_t *)(&dscr->addr), 8);
dscr->attr = le64_to_cpu(dscr->attr);
dscr->attr &= 0xfffffff8;
dscr->incr = 12;
break;
}
}
/* Advanced DMA data transfer */
static void sdhci_do_adma(SDHCIState *s)
{
unsigned int n, begin, length;
const uint16_t block_size = s->blksize & 0x0fff;
ADMADescr dscr;
int i;
for (i = 0; i < SDHC_ADMA_DESCS_PER_DELAY; ++i) {
s->admaerr &= ~SDHC_ADMAERR_LENGTH_MISMATCH;
get_adma_description(s, &dscr);
DPRINT_L2("ADMA loop: addr=" TARGET_FMT_plx ", len=%d, attr=%x\n",
dscr.addr, dscr.length, dscr.attr);
if ((dscr.attr & SDHC_ADMA_ATTR_VALID) == 0) {
/* Indicate that error occurred in ST_FDS state */
s->admaerr &= ~SDHC_ADMAERR_STATE_MASK;
s->admaerr |= SDHC_ADMAERR_STATE_ST_FDS;
/* Generate ADMA error interrupt */
if (s->errintstsen & SDHC_EISEN_ADMAERR) {
s->errintsts |= SDHC_EIS_ADMAERR;
s->norintsts |= SDHC_NIS_ERR;
}
sdhci_update_irq(s);
return;
}
length = dscr.length ? dscr.length : 65536;
switch (dscr.attr & SDHC_ADMA_ATTR_ACT_MASK) {
case SDHC_ADMA_ATTR_ACT_TRAN: /* data transfer */
if (s->trnmod & SDHC_TRNS_READ) {
while (length) {
if (s->data_count == 0) {
for (n = 0; n < block_size; n++) {
s->fifo_buffer[n] = sd_read_data(s->card);
}
}
begin = s->data_count;
if ((length + begin) < block_size) {
s->data_count = length + begin;
length = 0;
} else {
s->data_count = block_size;
length -= block_size - begin;
}
dma_memory_write(&address_space_memory, dscr.addr,
&s->fifo_buffer[begin],
s->data_count - begin);
dscr.addr += s->data_count - begin;
if (s->data_count == block_size) {
s->data_count = 0;
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
if (s->blkcnt == 0) {
break;
}
}
}
}
} else {
while (length) {
begin = s->data_count;
if ((length + begin) < block_size) {
s->data_count = length + begin;
length = 0;
} else {
s->data_count = block_size;
length -= block_size - begin;
}
dma_memory_read(&address_space_memory, dscr.addr,
&s->fifo_buffer[begin],
s->data_count - begin);
dscr.addr += s->data_count - begin;
if (s->data_count == block_size) {
for (n = 0; n < block_size; n++) {
sd_write_data(s->card, s->fifo_buffer[n]);
}
s->data_count = 0;
if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
s->blkcnt--;
if (s->blkcnt == 0) {
break;
}
}
}
}
}
s->admasysaddr += dscr.incr;
break;
case SDHC_ADMA_ATTR_ACT_LINK: /* link to next descriptor table */
s->admasysaddr = dscr.addr;
DPRINT_L1("ADMA link: admasysaddr=0x%lx\n", s->admasysaddr);
break;
default:
s->admasysaddr += dscr.incr;
break;
}
if (dscr.attr & SDHC_ADMA_ATTR_INT) {
DPRINT_L1("ADMA interrupt: admasysaddr=0x%lx\n", s->admasysaddr);
if (s->norintstsen & SDHC_NISEN_DMA) {
s->norintsts |= SDHC_NIS_DMA;
}
sdhci_update_irq(s);
}
/* ADMA transfer terminates if blkcnt == 0 or by END attribute */
if (((s->trnmod & SDHC_TRNS_BLK_CNT_EN) &&
(s->blkcnt == 0)) || (dscr.attr & SDHC_ADMA_ATTR_END)) {
DPRINT_L2("ADMA transfer completed\n");
if (length || ((dscr.attr & SDHC_ADMA_ATTR_END) &&
(s->trnmod & SDHC_TRNS_BLK_CNT_EN) &&
s->blkcnt != 0)) {
ERRPRINT("SD/MMC host ADMA length mismatch\n");
s->admaerr |= SDHC_ADMAERR_LENGTH_MISMATCH |
SDHC_ADMAERR_STATE_ST_TFR;
if (s->errintstsen & SDHC_EISEN_ADMAERR) {
ERRPRINT("Set ADMA error flag\n");
s->errintsts |= SDHC_EIS_ADMAERR;
s->norintsts |= SDHC_NIS_ERR;
}
sdhci_update_irq(s);
}
sdhci_end_transfer(s);
return;
}
}
/* we have unfinished business - reschedule to continue ADMA */
timer_mod(s->transfer_timer,
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + SDHC_TRANSFER_DELAY);
}
/* Perform data transfer according to controller configuration */
static void sdhci_data_transfer(void *opaque)
{
SDHCIState *s = (SDHCIState *)opaque;
if (s->trnmod & SDHC_TRNS_DMA) {
switch (SDHC_DMA_TYPE(s->hostctl)) {
case SDHC_CTRL_SDMA:
if ((s->trnmod & SDHC_TRNS_MULTI) &&
(!(s->trnmod & SDHC_TRNS_BLK_CNT_EN) || s->blkcnt == 0)) {
break;
}
if ((s->blkcnt == 1) || !(s->trnmod & SDHC_TRNS_MULTI)) {
sdhci_sdma_transfer_single_block(s);
} else {
sdhci_sdma_transfer_multi_blocks(s);
}
break;
case SDHC_CTRL_ADMA1_32:
if (!(s->capareg & SDHC_CAN_DO_ADMA1)) {
ERRPRINT("ADMA1 not supported\n");
break;
}
sdhci_do_adma(s);
break;
case SDHC_CTRL_ADMA2_32:
if (!(s->capareg & SDHC_CAN_DO_ADMA2)) {
ERRPRINT("ADMA2 not supported\n");
break;
}
sdhci_do_adma(s);
break;
case SDHC_CTRL_ADMA2_64:
if (!(s->capareg & SDHC_CAN_DO_ADMA2) ||
!(s->capareg & SDHC_64_BIT_BUS_SUPPORT)) {
ERRPRINT("64 bit ADMA not supported\n");
break;
}
sdhci_do_adma(s);
break;
default:
ERRPRINT("Unsupported DMA type\n");
break;
}
} else {
if ((s->trnmod & SDHC_TRNS_READ) && sd_data_ready(s->card)) {
s->prnsts |= SDHC_DOING_READ | SDHC_DATA_INHIBIT |
SDHC_DAT_LINE_ACTIVE;
sdhci_read_block_from_card(s);
} else {
s->prnsts |= SDHC_DOING_WRITE | SDHC_DAT_LINE_ACTIVE |
SDHC_SPACE_AVAILABLE | SDHC_DATA_INHIBIT;
sdhci_write_block_to_card(s);
}
}
}
static bool sdhci_can_issue_command(SDHCIState *s)
{
if (!SDHC_CLOCK_IS_ON(s->clkcon) || !(s->pwrcon & SDHC_POWER_ON) ||
(((s->prnsts & SDHC_DATA_INHIBIT) || s->stopped_state) &&
((s->cmdreg & SDHC_CMD_DATA_PRESENT) ||
((s->cmdreg & SDHC_CMD_RESPONSE) == SDHC_CMD_RSP_WITH_BUSY &&
!(SDHC_COMMAND_TYPE(s->cmdreg) == SDHC_CMD_ABORT))))) {
return false;
}
return true;
}
/* The Buffer Data Port register must be accessed in sequential and
* continuous manner */
static inline bool
sdhci_buff_access_is_sequential(SDHCIState *s, unsigned byte_num)
{
if ((s->data_count & 0x3) != byte_num) {
ERRPRINT("Non-sequential access to Buffer Data Port register"
"is prohibited\n");
return false;
}
return true;
}
static uint64_t sdhci_read(void *opaque, hwaddr offset, unsigned size)
{
SDHCIState *s = (SDHCIState *)opaque;
uint32_t ret = 0;
switch (offset & ~0x3) {
case SDHC_SYSAD:
ret = s->sdmasysad;
break;
case SDHC_BLKSIZE:
ret = s->blksize | (s->blkcnt << 16);
break;
case SDHC_ARGUMENT:
ret = s->argument;
break;
case SDHC_TRNMOD:
ret = s->trnmod | (s->cmdreg << 16);
break;
case SDHC_RSPREG0 ... SDHC_RSPREG3:
ret = s->rspreg[((offset & ~0x3) - SDHC_RSPREG0) >> 2];
break;
case SDHC_BDATA:
if (sdhci_buff_access_is_sequential(s, offset - SDHC_BDATA)) {
ret = sdhci_read_dataport(s, size);
DPRINT_L2("read %ub: addr[0x%04x] -> %u(0x%x)\n", size, (int)offset,
ret, ret);
return ret;
}
break;
case SDHC_PRNSTS:
ret = s->prnsts;
break;
case SDHC_HOSTCTL:
ret = s->hostctl | (s->pwrcon << 8) | (s->blkgap << 16) |
(s->wakcon << 24);
break;
case SDHC_CLKCON:
ret = s->clkcon | (s->timeoutcon << 16);
break;
case SDHC_NORINTSTS:
ret = s->norintsts | (s->errintsts << 16);
break;
case SDHC_NORINTSTSEN:
ret = s->norintstsen | (s->errintstsen << 16);
break;
case SDHC_NORINTSIGEN:
ret = s->norintsigen | (s->errintsigen << 16);
break;
case SDHC_ACMD12ERRSTS:
ret = s->acmd12errsts;
break;
case SDHC_CAPAREG:
ret = s->capareg;
break;
case SDHC_MAXCURR:
ret = s->maxcurr;
break;
case SDHC_ADMAERR:
ret = s->admaerr;
break;
case SDHC_ADMASYSADDR:
ret = (uint32_t)s->admasysaddr;
break;
case SDHC_ADMASYSADDR + 4:
ret = (uint32_t)(s->admasysaddr >> 32);
break;
case SDHC_SLOT_INT_STATUS:
ret = (SD_HOST_SPECv2_VERS << 16) | sdhci_slotint(s);
break;
default:
ERRPRINT("bad %ub read: addr[0x%04x]\n", size, (int)offset);
break;
}
ret >>= (offset & 0x3) * 8;
ret &= (1ULL << (size * 8)) - 1;
DPRINT_L2("read %ub: addr[0x%04x] -> %u(0x%x)\n", size, (int)offset, ret, ret);
return ret;
}
static inline void sdhci_blkgap_write(SDHCIState *s, uint8_t value)
{
if ((value & SDHC_STOP_AT_GAP_REQ) && (s->blkgap & SDHC_STOP_AT_GAP_REQ)) {
return;
}
s->blkgap = value & SDHC_STOP_AT_GAP_REQ;
if ((value & SDHC_CONTINUE_REQ) && s->stopped_state &&
(s->blkgap & SDHC_STOP_AT_GAP_REQ) == 0) {
if (s->stopped_state == sdhc_gap_read) {
s->prnsts |= SDHC_DAT_LINE_ACTIVE | SDHC_DOING_READ;
sdhci_read_block_from_card(s);
} else {
s->prnsts |= SDHC_DAT_LINE_ACTIVE | SDHC_DOING_WRITE;
sdhci_write_block_to_card(s);
}
s->stopped_state = sdhc_not_stopped;
} else if (!s->stopped_state && (value & SDHC_STOP_AT_GAP_REQ)) {
if (s->prnsts & SDHC_DOING_READ) {
s->stopped_state = sdhc_gap_read;
} else if (s->prnsts & SDHC_DOING_WRITE) {
s->stopped_state = sdhc_gap_write;
}
}
}
static inline void sdhci_reset_write(SDHCIState *s, uint8_t value)
{
switch (value) {
case SDHC_RESET_ALL:
sdhci_reset(s);
break;
case SDHC_RESET_CMD:
s->prnsts &= ~SDHC_CMD_INHIBIT;
s->norintsts &= ~SDHC_NIS_CMDCMP;
break;
case SDHC_RESET_DATA:
s->data_count = 0;
s->prnsts &= ~(SDHC_SPACE_AVAILABLE | SDHC_DATA_AVAILABLE |
SDHC_DOING_READ | SDHC_DOING_WRITE |
SDHC_DATA_INHIBIT | SDHC_DAT_LINE_ACTIVE);
s->blkgap &= ~(SDHC_STOP_AT_GAP_REQ | SDHC_CONTINUE_REQ);
s->stopped_state = sdhc_not_stopped;
s->norintsts &= ~(SDHC_NIS_WBUFRDY | SDHC_NIS_RBUFRDY |
SDHC_NIS_DMA | SDHC_NIS_TRSCMP | SDHC_NIS_BLKGAP);
break;
}
}
static void
sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size)
{
SDHCIState *s = (SDHCIState *)opaque;
unsigned shift = 8 * (offset & 0x3);
uint32_t mask = ~(((1ULL << (size * 8)) - 1) << shift);
uint32_t value = val;
value <<= shift;
switch (offset & ~0x3) {
case SDHC_SYSAD:
s->sdmasysad = (s->sdmasysad & mask) | value;
MASKED_WRITE(s->sdmasysad, mask, value);
/* Writing to last byte of sdmasysad might trigger transfer */
if (!(mask & 0xFF000000) && TRANSFERRING_DATA(s->prnsts) && s->blkcnt &&
s->blksize && SDHC_DMA_TYPE(s->hostctl) == SDHC_CTRL_SDMA) {
sdhci_sdma_transfer_multi_blocks(s);
}
break;
case SDHC_BLKSIZE:
if (!TRANSFERRING_DATA(s->prnsts)) {
MASKED_WRITE(s->blksize, mask, value);
MASKED_WRITE(s->blkcnt, mask >> 16, value >> 16);
}
break;
case SDHC_ARGUMENT:
MASKED_WRITE(s->argument, mask, value);
break;
case SDHC_TRNMOD:
/* DMA can be enabled only if it is supported as indicated by
* capabilities register */
if (!(s->capareg & SDHC_CAN_DO_DMA)) {
value &= ~SDHC_TRNS_DMA;
}
MASKED_WRITE(s->trnmod, mask, value);
MASKED_WRITE(s->cmdreg, mask >> 16, value >> 16);
/* Writing to the upper byte of CMDREG triggers SD command generation */
if ((mask & 0xFF000000) || !sdhci_can_issue_command(s)) {
break;
}
sdhci_send_command(s);
break;
case SDHC_BDATA:
if (sdhci_buff_access_is_sequential(s, offset - SDHC_BDATA)) {
sdhci_write_dataport(s, value >> shift, size);
}
break;
case SDHC_HOSTCTL:
if (!(mask & 0xFF0000)) {
sdhci_blkgap_write(s, value >> 16);
}
MASKED_WRITE(s->hostctl, mask, value);
MASKED_WRITE(s->pwrcon, mask >> 8, value >> 8);
MASKED_WRITE(s->wakcon, mask >> 24, value >> 24);
if (!(s->prnsts & SDHC_CARD_PRESENT) || ((s->pwrcon >> 1) & 0x7) < 5 ||
!(s->capareg & (1 << (31 - ((s->pwrcon >> 1) & 0x7))))) {
s->pwrcon &= ~SDHC_POWER_ON;
}
break;
case SDHC_CLKCON:
if (!(mask & 0xFF000000)) {
sdhci_reset_write(s, value >> 24);
}
MASKED_WRITE(s->clkcon, mask, value);
MASKED_WRITE(s->timeoutcon, mask >> 16, value >> 16);
if (s->clkcon & SDHC_CLOCK_INT_EN) {
s->clkcon |= SDHC_CLOCK_INT_STABLE;
} else {
s->clkcon &= ~SDHC_CLOCK_INT_STABLE;
}
break;
case SDHC_NORINTSTS:
if (s->norintstsen & SDHC_NISEN_CARDINT) {
value &= ~SDHC_NIS_CARDINT;
}
s->norintsts &= mask | ~value;
s->errintsts &= (mask >> 16) | ~(value >> 16);
if (s->errintsts) {
s->norintsts |= SDHC_NIS_ERR;
} else {
s->norintsts &= ~SDHC_NIS_ERR;
}
sdhci_update_irq(s);
break;
case SDHC_NORINTSTSEN:
MASKED_WRITE(s->norintstsen, mask, value);
MASKED_WRITE(s->errintstsen, mask >> 16, value >> 16);
s->norintsts &= s->norintstsen;
s->errintsts &= s->errintstsen;
if (s->errintsts) {
s->norintsts |= SDHC_NIS_ERR;
} else {
s->norintsts &= ~SDHC_NIS_ERR;
}
sdhci_update_irq(s);
break;
case SDHC_NORINTSIGEN:
MASKED_WRITE(s->norintsigen, mask, value);
MASKED_WRITE(s->errintsigen, mask >> 16, value >> 16);
sdhci_update_irq(s);
break;
case SDHC_ADMAERR:
MASKED_WRITE(s->admaerr, mask, value);
break;
case SDHC_ADMASYSADDR:
s->admasysaddr = (s->admasysaddr & (0xFFFFFFFF00000000ULL |
(uint64_t)mask)) | (uint64_t)value;
break;
case SDHC_ADMASYSADDR + 4:
s->admasysaddr = (s->admasysaddr & (0x00000000FFFFFFFFULL |
((uint64_t)mask << 32))) | ((uint64_t)value << 32);
break;
case SDHC_FEAER:
s->acmd12errsts |= value;
s->errintsts |= (value >> 16) & s->errintstsen;
if (s->acmd12errsts) {
s->errintsts |= SDHC_EIS_CMD12ERR;
}
if (s->errintsts) {
s->norintsts |= SDHC_NIS_ERR;
}
sdhci_update_irq(s);
break;
default:
ERRPRINT("bad %ub write offset: addr[0x%04x] <- %u(0x%x)\n",
size, (int)offset, value >> shift, value >> shift);
break;
}
DPRINT_L2("write %ub: addr[0x%04x] <- %u(0x%x)\n",
size, (int)offset, value >> shift, value >> shift);
}
static const MemoryRegionOps sdhci_mmio_ops = {
.read = sdhci_read,
.write = sdhci_write,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
.unaligned = false
},
.endianness = DEVICE_LITTLE_ENDIAN,
};
static inline unsigned int sdhci_get_fifolen(SDHCIState *s)
{
switch (SDHC_CAPAB_BLOCKSIZE(s->capareg)) {
case 0:
return 512;
case 1:
return 1024;
case 2:
return 2048;
default:
hw_error("SDHC: unsupported value for maximum block size\n");
return 0;
}
}
static void sdhci_initfn(SDHCIState *s)
{
DriveInfo *di;
di = drive_get_next(IF_SD);
s->card = sd_init(di ? blk_by_legacy_dinfo(di) : NULL, false);
if (s->card == NULL) {
exit(1);
}
s->eject_cb = qemu_allocate_irq(sdhci_insert_eject_cb, s, 0);
s->ro_cb = qemu_allocate_irq(sdhci_card_readonly_cb, s, 0);
sd_set_cb(s->card, s->ro_cb, s->eject_cb);
s->insert_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, sdhci_raise_insertion_irq, s);
s->transfer_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, sdhci_data_transfer, s);
}
static void sdhci_uninitfn(SDHCIState *s)
{
timer_del(s->insert_timer);
timer_free(s->insert_timer);
timer_del(s->transfer_timer);
timer_free(s->transfer_timer);
qemu_free_irq(s->eject_cb);
qemu_free_irq(s->ro_cb);
if (s->fifo_buffer) {
g_free(s->fifo_buffer);
s->fifo_buffer = NULL;
}
}
const VMStateDescription sdhci_vmstate = {
.name = "sdhci",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(sdmasysad, SDHCIState),
VMSTATE_UINT16(blksize, SDHCIState),
VMSTATE_UINT16(blkcnt, SDHCIState),
VMSTATE_UINT32(argument, SDHCIState),
VMSTATE_UINT16(trnmod, SDHCIState),
VMSTATE_UINT16(cmdreg, SDHCIState),
VMSTATE_UINT32_ARRAY(rspreg, SDHCIState, 4),
VMSTATE_UINT32(prnsts, SDHCIState),
VMSTATE_UINT8(hostctl, SDHCIState),
VMSTATE_UINT8(pwrcon, SDHCIState),
VMSTATE_UINT8(blkgap, SDHCIState),
VMSTATE_UINT8(wakcon, SDHCIState),
VMSTATE_UINT16(clkcon, SDHCIState),
VMSTATE_UINT8(timeoutcon, SDHCIState),
VMSTATE_UINT8(admaerr, SDHCIState),
VMSTATE_UINT16(norintsts, SDHCIState),
VMSTATE_UINT16(errintsts, SDHCIState),
VMSTATE_UINT16(norintstsen, SDHCIState),
VMSTATE_UINT16(errintstsen, SDHCIState),
VMSTATE_UINT16(norintsigen, SDHCIState),
VMSTATE_UINT16(errintsigen, SDHCIState),
VMSTATE_UINT16(acmd12errsts, SDHCIState),
VMSTATE_UINT16(data_count, SDHCIState),
VMSTATE_UINT64(admasysaddr, SDHCIState),
VMSTATE_UINT8(stopped_state, SDHCIState),
VMSTATE_VBUFFER_UINT32(fifo_buffer, SDHCIState, 1, NULL, 0, buf_maxsz),
VMSTATE_TIMER(insert_timer, SDHCIState),
VMSTATE_TIMER(transfer_timer, SDHCIState),
VMSTATE_END_OF_LIST()
}
};
/* Capabilities registers provide information on supported features of this
* specific host controller implementation */
static Property sdhci_properties[] = {
DEFINE_PROP_UINT32("capareg", SDHCIState, capareg,
SDHC_CAPAB_REG_DEFAULT),
DEFINE_PROP_UINT32("maxcurr", SDHCIState, maxcurr, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void sdhci_sysbus_init(Object *obj)
{
SDHCIState *s = SYSBUS_SDHCI(obj);
sdhci_initfn(s);
}
static void sdhci_sysbus_finalize(Object *obj)
{
SDHCIState *s = SYSBUS_SDHCI(obj);
sdhci_uninitfn(s);
}
static void sdhci_sysbus_realize(DeviceState *dev, Error ** errp)
{
SDHCIState *s = SYSBUS_SDHCI(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
s->buf_maxsz = sdhci_get_fifolen(s);
s->fifo_buffer = g_malloc0(s->buf_maxsz);
sysbus_init_irq(sbd, &s->irq);
memory_region_init_io(&s->iomem, OBJECT(s), &sdhci_mmio_ops, s, "sdhci",
SDHC_REGISTERS_MAP_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
}
static void sdhci_sysbus_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &sdhci_vmstate;
dc->props = sdhci_properties;
dc->realize = sdhci_sysbus_realize;
}
static const TypeInfo sdhci_sysbus_info = {
.name = TYPE_SYSBUS_SDHCI,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SDHCIState),
.instance_init = sdhci_sysbus_init,
.instance_finalize = sdhci_sysbus_finalize,
.class_init = sdhci_sysbus_class_init,
};
static void sdhci_register_types(void)
{
type_register_static(&sdhci_sysbus_info);
}
type_init(sdhci_register_types)
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