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rockbox/firmware/target/arm/tms320dm320/sdmmc-dm320.c
Michael Sevakis 1654efc313 Unify storage threads into one 
* Editing a bunch of drivers' thread routines in order to
implement a new feature is tedious.

* No matter the number of storage drivers, they share one thread.
No extra threads needed for CONFIG_STORAGE_MULTI.

* Each has an event callback called by the storage thread.

* A default callback is provided to fake sleeping in order to
trigger idle callbacks. It could also do other default processing.
Changes to it will be part of driver code without editing each
one.

* Drivers may sleep and wake as they please as long as they give
a low pulse on their storage bit to ask to go into sleep mode.
Idle callback is called on its behalf and driver immediately put
into sleep mode.

* Drivers may indicate they are to continue receiving events in
USB mode, otherwise they receve nothing until disconnect (they
do receive SYS_USB_DISCONNECTED no matter what).

* Rework a few things to keep the callback implementation sane
and maintainable. ata.c was dreadful with all those bools; make
it a state machine and easier to follow. Remove last_user_activity;
it has no purpose that isn't served by keeping the disk active
through last_disk_activity instead.

* Even-out stack sizes partly because of a lack of a decent place
to define them by driver or SoC or whatever; it doesn't seem too
critical to do that anyway. Many are simply too large while at
least one isn't really adequate. They may be individually
overridden if necessary (figure out where). The thread uses the
greatest size demanded. Newer file code is much more frugal with
stack space. I barely see use crack 50% after idle callbacks
(usually mid-40s). Card insert/eject doesn't demand much.

* No forcing of idle callbacks. If it isn't necessary for one or
more non-disk storage types, it really isn't any more necessary for
disk storage. Besides, it makes the whole thing easier to implement.

Change-Id: Id30c284d82a8af66e47f2cfe104c52cbd8aa7215
2017-10-26 14:35:41 -04:00

897 lines
21 KiB
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: $
*
* Copyright (C) 2011 by Tomasz Moń
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include <string.h>
#include "gcc_extensions.h"
#include "panic.h"
#include "dma-target.h"
#include "ata_idle_notify.h"
//#define SD_DEBUG
#ifdef SD_DEBUG
#include "lcd-target.h"
#include "lcd.h"
#include "font.h"
#ifdef BOOTLOADER
#include "common.h"
#else
#include "debug.h"
#endif
#endif
#include "sdmmc.h"
#include "system-target.h"
#include "storage.h"
/* The configuration method is not very flexible. */
#define CARD_NUM_SLOT 1
#define NUM_CARDS 2
#define EC_OK 0
#define EC_FAILED 1
#define EC_NOCARD 2
#define EC_WAIT_STATE_FAILED 3
#define EC_POWER_UP 4
#define EC_FIFO_WR_EMPTY 5
#define EC_FIFO_WR_DONE 6
#define EC_TRAN_READ_ENTRY 7
#define EC_TRAN_READ_EXIT 8
#define EC_TRAN_WRITE_ENTRY 9
#define EC_TRAN_WRITE_EXIT 10
#define EC_COMMAND 11
#define EC_WRITE_PROTECT 12
#define EC_DATA_TIMEOUT 13
#define EC_RESP_TIMEOUT 14
#define EC_CRC_ERROR 15
#define NUM_EC 16
#define MIN_YIELD_PERIOD 5
#define UNALIGNED_NUM_SECTORS 10
#define MAX_TRANSFER_ERRORS 10
#define BLOCKS_PER_BANK 0x7A7800
/* command flags for send_cmd */
#define SDHC_RESP_FMT_NONE 0x0000
#define SDHC_RESP_FMT_1 0x0200
#define SDHC_RESP_FMT_2 0x0400
#define SDHC_RESP_FMT_3 0x0600
#define INITIAL_CLK 312500 /* Initial clock */
#define SD_CLK 24000000 /* Clock for SD cards */
#define MMC_CLK 15000000 /* Clock for MMC cards */
#ifdef SD_DEBUG
#ifdef BOOTLOADER
#define dbgprintf printf
#else
#define dbgprintf DEBUGF
#endif
#else
#define dbgprintf(...)
#endif
struct sd_card_status
{
int retry;
int retry_max;
};
/** static, private data **/
/* for compatibility */
static long last_disk_activity = -1;
static bool initialized = false;
static bool sd_enabled = false;
static long next_yield = 0;
static tCardInfo card_info [NUM_CARDS];
static tCardInfo *currcard;
static struct sd_card_status sd_status[NUM_CARDS] =
{
#if NUM_CARDS > 1
{0, 10},
#endif
{0, 10}
};
/* Shoot for around 75% usage */
static struct mutex sd_mtx SHAREDBSS_ATTR;
static volatile unsigned int transfer_error[NUM_DRIVES];
/* align on cache line size */
static unsigned char aligned_buffer[UNALIGNED_NUM_SECTORS * SD_BLOCK_SIZE]
__attribute__((aligned(32)));
static void sd_card_mux(int card_no)
{
#ifdef HAVE_MULTIDRIVE
#ifdef SANSA_CONNECT
/* GIO6 - select Card; GIO5 - select iNAND (both active low) */
if (card_no == CARD_NUM_SLOT)
{
IO_GIO_BITSET0 = (1 << 5); /* deselect iNAND (GIO5) */
IO_GIO_BITCLR0 = (1 << 6); /* select card (GIO6) */
}
else
{
IO_GIO_BITSET0 = (1 << 6); /* deselect card (GIO6) */
IO_GIO_BITCLR0 = (1 << 5); /* select iNAND (GIO5) */
}
#else /* Different players */
(void)card_no;
#endif
#else /* No multidrive */
(void)card_no;
#endif
}
static inline void enable_controller(bool on)
{
sd_enabled = on;
}
void sd_enable(bool on)
{
mutex_lock(&sd_mtx);
enable_controller(on);
mutex_unlock(&sd_mtx);
}
/* sets clock rate just like OF does */
static void sd_set_clock_rate(unsigned long rate)
{
unsigned char rate_val = 0;
if (rate == INITIAL_CLK)
{
rate_val = 0x3B;
}
else if (rate > INITIAL_CLK)
{
rate_val = 0;
}
else
{
rate_val = 0xFF;
}
IO_MMC_MEM_CLK_CONTROL = (IO_MMC_MEM_CLK_CONTROL & 0xFF00) | rate_val;
}
static int sd_poll_status(int st_reg_num, volatile unsigned int flag)
{
unsigned int status;
unsigned int status1;
bool done;
do
{
long time = current_tick;
if (TIME_AFTER(time, next_yield))
{
long ty = current_tick;
yield();
next_yield = ty + MIN_YIELD_PERIOD;
}
status = IO_MMC_STATUS0;
status1 = IO_MMC_STATUS1;
if (status & MMC_ST0_CMD_TIMEOUT)
{
dbgprintf("CMD timeout");
return -EC_RESP_TIMEOUT;
}
if (status & MMC_ST0_DATA_TIMEOUT)
{
dbgprintf("DATA timeout");
return -EC_DATA_TIMEOUT;
}
if (status &
(MMC_ST0_WR_CRCERR | MMC_ST0_RD_CRCERR | MMC_ST0_RESP_CRCERR))
{
dbgprintf("CRC error");
return -EC_CRC_ERROR;
}
if (st_reg_num == 0)
{
done = status & flag;
}
else
{
done = status1 & flag;
}
} while (!done);
return EC_OK;
}
static int dma_wait_for_completion(void)
{
unsigned short dma_status;
do
{
long time = current_tick;
if (TIME_AFTER(time, next_yield))
{
long ty = current_tick;
yield();
next_yield = ty + MIN_YIELD_PERIOD;
}
dma_status = IO_MMC_SD_DMA_STATUS1;
if (dma_status & (1 << 13))
{
return -EC_DATA_TIMEOUT;
}
} while (dma_status & (1 << 12));
return EC_OK;
}
static int sd_command(int cmd, unsigned long arg,
int cmdat, unsigned long *response)
{
int ret;
/* Clear response registers */
IO_MMC_RESPONSE0 = 0;
IO_MMC_RESPONSE1 = 0;
IO_MMC_RESPONSE2 = 0;
IO_MMC_RESPONSE3 = 0;
IO_MMC_RESPONSE4 = 0;
IO_MMC_RESPONSE5 = 0;
IO_MMC_RESPONSE6 = 0;
IO_MMC_RESPONSE7 = 0;
IO_MMC_COMMAND_INDEX = 0;
IO_MMC_SPI_DATA = 0;
IO_MMC_ARG_LOW = (unsigned int)((arg & 0xFFFF));
IO_MMC_ARG_HI = (unsigned int)((arg & 0xFFFF0000) >> 16);
/* SD is always in push-pull mode */
cmdat |= MMC_CMD_PPLEN;
cmdat |= (cmd & MMC_CMD_CMD_MASK);
if (cmdat & MMC_CMD_DATA)
cmdat |= MMC_CMD_DCLR;
IO_MMC_COMMAND = cmdat;
if (cmdat & MMC_CMD_DATA)
{
/* Command requires data - do not wait for RSPDNE */
ret = EC_OK;
}
else
{
ret = sd_poll_status(0, MMC_ST0_RSPDNE);
}
if (ret != EC_OK)
{
dbgprintf("Command failed (ret %d)", ret);
return ret;
}
if (response == NULL)
{
/* discard response */
}
else if ((cmdat & SDHC_RESP_FMT_1) || (cmdat & SDHC_RESP_FMT_3))
{
response[0] = (IO_MMC_RESPONSE7 << 16) | IO_MMC_RESPONSE6;
}
else if (cmdat & SDHC_RESP_FMT_2)
{
response[0] = (IO_MMC_RESPONSE7 << 16) | IO_MMC_RESPONSE6;
response[1] = (IO_MMC_RESPONSE5 << 16) | IO_MMC_RESPONSE4;
response[2] = (IO_MMC_RESPONSE3 << 16) | IO_MMC_RESPONSE2;
response[3] = (IO_MMC_RESPONSE1 << 16) | IO_MMC_RESPONSE0;
}
return 0;
}
static int sd_init_card(const int card_no)
{
bool sdhc = false;
unsigned long response[4];
int ret;
int i;
memset(currcard, 0, sizeof(*currcard));
sd_card_mux(card_no);
/* Set data bus width to 1 bit */
bitclr16(&IO_MMC_CONTROL, MMC_CTRL_WIDTH);
sd_set_clock_rate(INITIAL_CLK);
/* Prevent controller lock */
udelay(100);
ret = sd_command(SD_GO_IDLE_STATE, 0, MMC_CMD_INITCLK, NULL);
if (ret < 0)
return -1;
ret = sd_command(SD_SEND_IF_COND, 0x1AA,
SDHC_RESP_FMT_3, response);
if ((response[0] & 0xFFF) == 0x1AA)
{
sdhc = true;
dbgprintf("found sdhc card");
}
while ((currcard->ocr & (1 << 31)) == 0) /* until card is powered up */
{
ret = sd_command(SD_APP_CMD, currcard->rca,
SDHC_RESP_FMT_1, NULL);
if (ret < 0)
{
dbgprintf("SD_APP_CMD failed");
return -1;
}
ret = sd_command(SD_APP_OP_COND,
(1 << 20) /* 3.2-3.3V */ |
(1 << 21) /* 3.3-3.4V */ |
(sdhc ? (1 << 30) : 0),
SDHC_RESP_FMT_3, &currcard->ocr);
if (ret < 0)
{
dbgprintf("SD_APP_OP_COND failed");
return -1;
}
}
dbgprintf("Card powered up");
ret = sd_command(SD_ALL_SEND_CID, 0,
SDHC_RESP_FMT_2, response);
if (ret < 0)
{
dbgprintf("SD_ALL_SEND_CID failed");
return -1;
}
for (i = 0; i<4; i++)
{
currcard->cid[i] = response[i];
}
ret = sd_command(SD_SEND_RELATIVE_ADDR, 0,
SDHC_RESP_FMT_1, &currcard->rca);
if (ret < 0)
{
dbgprintf("SD_SEND_RELATIVE_ADDR failed");
return -1;
}
ret = sd_command(SD_SEND_CSD, currcard->rca,
SDHC_RESP_FMT_2, response);
if (ret < 0)
{
dbgprintf("SD_SEND_CSD failed");
return -1;
}
for (i = 0; i<4; i++)
{
currcard->csd[i] = response[i];
}
sd_parse_csd(currcard);
sd_set_clock_rate(currcard->speed);
/* Prevent controller lock */
udelay(100);
ret = sd_command(SD_SELECT_CARD, currcard->rca,
SDHC_RESP_FMT_1, NULL);
if (ret < 0)
{
dbgprintf("SD_SELECT_CARD failed");
return -1;
}
ret = sd_command(SD_APP_CMD, currcard->rca,
SDHC_RESP_FMT_1, NULL);
if (ret < 0)
{
dbgprintf("SD_APP_CMD failed");
return -1;
}
ret = sd_command(SD_SET_BUS_WIDTH, currcard->rca | 2,
SDHC_RESP_FMT_1, NULL); /* 4 bit */
if (ret < 0)
{
dbgprintf("SD_SET_BUS_WIDTH failed");
return -1;
}
/* Set data bus width to 4 bits */
bitset16(&IO_MMC_CONTROL, MMC_CTRL_WIDTH);
ret = sd_command(SD_SET_BLOCKLEN, currcard->blocksize,
SDHC_RESP_FMT_1, NULL);
if (ret < 0)
{
dbgprintf("SD_SET_BLOCKLEN failed");
return -1;
}
IO_MMC_BLOCK_LENGTH = currcard->blocksize;
dbgprintf("Card initialized");
currcard->initialized = 1;
return EC_OK;
}
/* lock must already by aquired */
static void sd_select_device(int card_no)
{
currcard = &card_info[card_no];
if (card_no == 0)
{
/* Main card always gets a chance */
sd_status[0].retry = 0;
}
if (currcard->initialized > 0)
{
/* This card is already initialized - switch to it */
sd_card_mux(card_no);
return;
}
if (currcard->initialized == 0)
{
/* Card needs (re)init */
sd_init_card(card_no);
}
}
static inline bool card_detect_target(void)
{
#ifdef SANSA_CONNECT
bool removed;
removed = IO_GIO_BITSET0 & (1 << 14);
return !removed;
#else
return false;
#endif
}
#ifdef HAVE_HOTSWAP
static int sd1_oneshot_callback(struct timeout *tmo)
{
/* This is called only if the state was stable for 300ms - check state
* and post appropriate event. */
queue_broadcast(card_detect_target() ? SYS_HOTSWAP_INSERTED :
SYS_HOTSWAP_EXTRACTED,
CARD_NUM_SLOT);
return 0;
(void)tmo;
}
#ifdef SANSA_CONNECT
void GIO14(void) __attribute__ ((section(".icode")));
void GIO14(void)
{
static struct timeout sd1_oneshot;
/* clear interrupt */
IO_INTC_IRQ2 = (1<<3);
timeout_register(&sd1_oneshot, sd1_oneshot_callback, (3*HZ/10), 0);
}
#endif
bool sd_removable(IF_MD_NONVOID(int card_no))
{
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
return (card_no == CARD_NUM_SLOT);
}
bool sd_present(IF_MD_NONVOID(int card_no))
{
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
return (card_no == CARD_NUM_SLOT) ? card_detect_target() :
#ifdef SANSA_CONNECT
true; /* iNAND is always present */
#else
false;
#endif
}
#else /* no hotswap */
bool sd_removable(IF_MD_NONVOID(int card_no))
{
#ifdef HAVE_MULTIDRIVE
(void)card_no;
#endif
/* not applicable */
return false;
}
#endif /* HAVE_HOTSWAP */
static int sd_wait_for_state(unsigned int state)
{
unsigned long response = 0;
unsigned int timeout = HZ; /* ticks */
long t = current_tick;
while (1)
{
long tick;
int ret = sd_command(SD_SEND_STATUS, currcard->rca,
SDHC_RESP_FMT_1, &response);
if (ret < 0)
return ret;
if ((SD_R1_CURRENT_STATE(response) == state))
{
return EC_OK;
}
if(TIME_AFTER(current_tick, t + timeout))
return -2;
if (TIME_AFTER((tick = current_tick), next_yield))
{
yield();
timeout += current_tick - tick;
next_yield = tick + MIN_YIELD_PERIOD;
}
}
}
static int sd_transfer_sectors(int card_no, unsigned long start,
int count, void *buffer, bool write)
{
int ret;
unsigned long start_addr;
int dma_channel = -1;
bool use_direct_dma;
int count_per_dma;
unsigned long rel_addr;
dbgprintf("transfer %d %d %d", card_no, start, count);
mutex_lock(&sd_mtx);
enable_controller(true);
sd_transfer_retry:
if (card_no == CARD_NUM_SLOT && !card_detect_target())
{
/* no external sd-card inserted */
ret = -EC_NOCARD;
goto sd_transfer_error;
}
sd_select_device(card_no);
if (currcard->initialized < 0)
{
ret = currcard->initialized;
goto sd_transfer_error;
}
last_disk_activity = current_tick;
ret = sd_wait_for_state(SD_TRAN);
if (ret < EC_OK)
{
goto sd_transfer_error;
}
IO_MMC_BLOCK_LENGTH = currcard->blocksize;
start_addr = start;
do
{
count_per_dma = count;
if (((unsigned long)buffer) & 0x1F)
{
/* MMC/SD interface requires 32-byte alignment of buffer */
use_direct_dma = false;
if (count > UNALIGNED_NUM_SECTORS)
{
count_per_dma = UNALIGNED_NUM_SECTORS;
}
}
else
{
use_direct_dma = true;
}
if (write == true)
{
if (use_direct_dma == false)
{
memcpy(aligned_buffer, buffer, count_per_dma*SD_BLOCK_SIZE);
}
commit_dcache_range(use_direct_dma ? buffer : aligned_buffer,
count_per_dma*SD_BLOCK_SIZE);
}
IO_MMC_NR_BLOCKS = count_per_dma;
/* Set start_addr to the correct unit (blocks or bytes) */
if (!(card_info[card_no].ocr & SD_OCR_CARD_CAPACITY_STATUS))
start_addr *= SD_BLOCK_SIZE; /* not SDHC */
ret = sd_command(write ? SD_WRITE_MULTIPLE_BLOCK : SD_READ_MULTIPLE_BLOCK,
start_addr, MMC_CMD_DCLR | MMC_CMD_DATA |
SDHC_RESP_FMT_1 | (write ? MMC_CMD_WRITE : 0),
NULL);
if (ret < 0)
goto sd_transfer_error;
/* other burst modes are not supported for this peripheral */
dma_channel = dma_request_channel(DMA_PERIPHERAL_MMCSD,
DMA_MODE_8_BURST);
if (use_direct_dma == true)
{
rel_addr = ((unsigned long)buffer)-CONFIG_SDRAM_START;
}
else
{
rel_addr = ((unsigned long)aligned_buffer)-CONFIG_SDRAM_START;
}
IO_MMC_SD_DMA_ADDR_LOW = rel_addr & 0xFFFF;
IO_MMC_SD_DMA_ADDR_HI = (rel_addr & 0xFFFF0000) >> 16;
IO_MMC_SD_DMA_MODE |= MMC_DMAMODE_ENABLE;
if (write == true)
{
IO_MMC_SD_DMA_MODE |= MMC_DMAMODE_WRITE;
}
IO_MMC_SD_DMA_TRIGGER = 1;
dbgprintf("SD DMA transfer in progress");
ret = dma_wait_for_completion();
dma_release_channel(dma_channel);
dbgprintf("SD DMA transfer complete");
if (ret != EC_OK)
{
goto sd_transfer_error;
}
count -= count_per_dma;
if (write == false)
{
discard_dcache_range(use_direct_dma ? buffer : aligned_buffer,
count_per_dma*SD_BLOCK_SIZE);
if (use_direct_dma == false)
{
memcpy(buffer, aligned_buffer, count_per_dma*SD_BLOCK_SIZE);
}
}
buffer += count_per_dma*SD_BLOCK_SIZE;
start_addr += count_per_dma;
last_disk_activity = current_tick;
ret = sd_command(SD_STOP_TRANSMISSION, 0, SDHC_RESP_FMT_1, NULL);
if (ret < 0)
{
goto sd_transfer_error;
}
ret = sd_wait_for_state(SD_TRAN);
if (ret < 0)
{
goto sd_transfer_error;
}
} while (count > 0);
while (1)
{
enable_controller(false);
mutex_unlock(&sd_mtx);
return ret;
sd_transfer_error:
if (sd_status[card_no].retry < sd_status[card_no].retry_max
&& ret != -EC_NOCARD)
{
sd_status[card_no].retry++;
currcard->initialized = 0;
goto sd_transfer_retry;
}
}
}
int sd_read_sectors(IF_MD(int card_no,) unsigned long start, int incount,
void* inbuf)
{
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
return sd_transfer_sectors(card_no, start, incount, inbuf, false);
}
int sd_write_sectors(IF_MD(int card_no,) unsigned long start, int count,
const void* outbuf)
{
#ifndef BOOTLOADER
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
return sd_transfer_sectors(card_no, start, count, (void*)outbuf, true);
#else /* we don't need write support in bootloader */
#ifdef HAVE_MULTIDRIVE
(void)card_no;
#endif
(void)start;
(void)count;
(void)outbuf;
return 0;
#endif
}
int sd_init(void)
{
int ret = EC_OK;
if (!initialized)
{
mutex_init(&sd_mtx);
initialized = true;
}
mutex_lock(&sd_mtx);
#ifndef BOOTLOADER
enable_controller(false);
#endif
/* based on linux/drivers/mmc/dm320mmc.c
Copyright (C) 2006 ZSI, All Rights Reserved.
Written by: Ben Bostwick */
bitclr16(&IO_CLK_MOD2, CLK_MOD2_MMC);
bitset16(&IO_CLK_INV, CLK_INV_MMC);
/* mmc module clock: 75 Mhz (AHB) / 2 = ~37.5 Mhz
* (Frequencies above are taken from Sansa Connect's OF source code) */
IO_CLK_DIV3 = (IO_CLK_DIV3 & 0xFF00) | 0x02; /* OF uses 1 */
bitset16(&IO_CLK_MOD2, CLK_MOD2_MMC);
/* set mmc module into reset */
bitset16(&IO_MMC_CONTROL, (MMC_CTRL_DATRST | MMC_CTRL_CMDRST));
/* set resp timeout to max */
IO_MMC_RESPONSE_TIMEOUT |= 0x1FFF;
IO_MMC_READ_TIMEOUT = 0xFFFF;
/* all done, take mmc module out of reset */
bitclr16(&IO_MMC_CONTROL, (MMC_CTRL_DATRST | MMC_CTRL_CMDRST));
#ifdef SANSA_CONNECT
/* GIO37 - Power Card; GIO38 - Power iNAND (both active low) */
IO_GIO_DIR2 &= ~((1 << 5) /* GIO37 */ | (1 << 6) /* GIO38 */);
IO_GIO_INV2 &= ~((1 << 5) /* GIO37 */ | (1 << 6) /* GIO38 */);
IO_GIO_BITCLR2 = (1 << 5) | (1 << 6);
/* GIO6 - select Card; GIO5 - select iNAND (both active low) */
IO_GIO_DIR0 &= ~((1 << 6) /* GIO6 */ | (1 << 5) /* GIO5 */);
IO_GIO_INV0 &= ~((1 << 6) /* GIO6 */ | (1 << 5) /* GIO5 */);
IO_GIO_BITSET0 = (1 << 6) | (1 << 5);
#ifdef HAVE_HOTSWAP
/* GIO14 is card detect */
IO_GIO_DIR0 |= (1 << 14); /* Set GIO14 as input */
IO_GIO_INV0 &= ~(1 << 14); /* GIO14 not inverted */
IO_GIO_IRQPORT |= (1 << 14); /* Enable GIO14 external interrupt */
IO_GIO_IRQEDGE |= (1 << 14); /* Any edge detection */
/* Enable GIO14 interrupt */
IO_INTC_EINT2 |= INTR_EINT2_EXT14;
#endif
#endif
sd_select_device(1);
/* Disable Memory Card CLK - it is enabled on demand by TMS320DM320 */
bitclr16(&IO_MMC_MEM_CLK_CONTROL, (1 << 8));
mutex_unlock(&sd_mtx);
return ret;
}
long sd_last_disk_activity(void)
{
return last_disk_activity;
}
tCardInfo *card_get_info_target(int card_no)
{
return &card_info[card_no];
}
int sd_event(long id, intptr_t data)
{
int rc = 0;
switch (id)
{
#ifdef HAVE_HOTSWAP
case SYS_HOTSWAP_INSERTED:
case SYS_HOTSWAP_EXTRACTED:
mutex_lock(&sd_mtx); /* lock-out card activity */
/* Force card init for new card, re-init for re-inserted one or
* clear if the last attempt to init failed with an error. */
card_info[data].initialized = 0;
mutex_unlock(&sd_mtx);
break;
#endif /* HAVE_HOTSWAP */
default:
rc = storage_event_default_handler(id, data, last_disk_activity,
STORAGE_SD);
break;
}
return rc;
}
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