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rockbox/firmware/target/arm/s3c2440/sd-s3c2440.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Bob Cousins
*
* 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.
*
****************************************************************************/
//#define SD_DEBUG
#include "sd.h"
#include "system.h"
#include <string.h>
#include "gcc_extensions.h"
#include "thread.h"
#include "panic.h"
#ifdef SD_DEBUG
#include "uart-s3c2440.h"
#endif
#ifdef HAVE_HOTSWAP
#include "sdmmc.h"
#include "disk.h"
#include "fat.h"
#endif
#include "dma-target.h"
#include "system-target.h"
#include "led-mini2440.h"
/* The configuration method is not very flexible. */
#define CARD_NUM_SLOT 0
#define NUM_CARDS 2
#if NUM_CARDS < NUM_DRIVES
#error NUM_CARDS less than NUM_DRIVES
#endif
#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 MIN_YIELD_PERIOD 1000
#define UNALIGNED_NUM_SECTORS 10
#define MAX_TRANSFER_ERRORS 10
/* command flags for send_cmd */
#define MCI_NO_FLAGS (0<<0)
#define MCI_RESP (1<<0)
#define MCI_LONG_RESP (1<<1)
#define MCI_ARG (1<<2)
#define INITIAL_CLK 400000 /* Initial clock */
#define SD_CLK 24000000 /* Clock for SD cards */
#define MMC_CLK 15000000 /* Clock for MMC cards */
#define SD_ACTIVE_LED LED4
#ifdef SD_DEBUG
#define dbgprintf uart_printf
#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];
#ifdef HAVE_MULTIDRIVE
static int curr_card = 0; /* current active card */
#if 0
static struct sd_card_status sd_status[NUM_CARDS] =
{
#if NUM_CARDS > 1
{0, 10},
#endif
{0, 10}
};
#endif
#endif
/* Shoot for around 75% usage */
static long sd_stack [(DEFAULT_STACK_SIZE*2 + 0x1c0)/sizeof(long)];
static const char sd_thread_name[] = "sd";
static struct mutex sd_mtx SHAREDBSS_ATTR;
static struct event_queue sd_queue;
static struct semaphore transfer_completion_signal;
static volatile unsigned int transfer_error[NUM_VOLUMES];
/* align on cache line size */
static unsigned char aligned_buffer[UNALIGNED_NUM_SECTORS * SD_BLOCK_SIZE]
__attribute__((aligned(32)));
static unsigned char * uncached_buffer;
static inline void mci_delay(void)
{
int i = 0xffff;
while (i--)
asm volatile ("nop\n");
}
/* TODO: should be in target include file */
/*****************************************************************************
Definitions specific to Mini2440
*****************************************************************************/
#define SD_CD (1<<8) /* Port G */
#define SD_WP (1<<8) /* Port H */
/*****************************************************************************
Functions specific to S3C2440 SoC
*****************************************************************************/
#ifdef SD_DEBUG
static unsigned reg_copy[16], reg_copy2[16];
static void get_regs (unsigned *regs)
{
unsigned j;
volatile unsigned long *sdi_reg = &SDICON;
for (j=0; j < 16;j++)
{
*regs++ = *sdi_reg++;
}
}
static void dump_regs (unsigned *regs1, unsigned *regs2)
{
unsigned j;
volatile unsigned long*sdi_reg = &SDICON;
unsigned long diff;
for (j=0; j < 16;j++)
{
diff = *regs1 ^ *regs2;
if (diff)
dbgprintf ("%8x %8x %8x %8x\n", sdi_reg, *regs1, *regs2, diff );
regs1++;
regs2++;
sdi_reg++;
}
}
#endif
static void debug_r1(int cmd)
{
#if defined(SD_DEBUG)
dbgprintf("CMD%2.2d:SDICSTA=%04x [%c%c%c%c%c-%c%c%c%c%c%c%c] SDIRSP0=%08x [%d %s] \n",
cmd,
SDICSTA,
(SDICSTA & S3C2410_SDICMDSTAT_CRCFAIL) ? 'C' : ' ',
(SDICSTA & S3C2410_SDICMDSTAT_CMDSENT) ? 'S' : ' ',
(SDICSTA & S3C2410_SDICMDSTAT_CMDTIMEOUT) ? 'T' : ' ',
(SDICSTA & S3C2410_SDICMDSTAT_RSPFIN) ? 'R' : ' ',
(SDICSTA & S3C2410_SDICMDSTAT_XFERING) ? 'X' : ' ',
(SDICSTA & 0x40) ? 'P' : ' ',
(SDICSTA & 0x20) ? 'A' : ' ',
(SDICSTA & 0x10) ? 'E' : ' ',
(SDICSTA & 0x08) ? 'C' : ' ',
(SDICSTA & 0x04) ? 'I' : ' ',
(SDICSTA & 0x02) ? 'R' : ' ',
(SDICSTA & 0x01) ? 'Z' : ' ',
SDIRSP0,
SD_R1_CURRENT_STATE(SDIRSP0),
(SDIRSP0 & SD_R1_READY_FOR_DATA) ? "RDY " : " "
);
#else
(void)cmd;
#endif
}
void SDI (void)
{
int status = SDIDSTA;
#ifndef HAVE_MULTIDRIVE
const int curr_card = 0;
#endif
transfer_error[curr_card] = status
#if 0
& ( S3C2410_SDIDSTA_CRCFAIL | S3C2410_SDIDSTA_RXCRCFAIL |
S3C2410_SDIDSTA_DATATIMEOUT )
#endif
;
SDIDSTA |= S3C2410_SDIDSTA_CLEAR_BITS; /* needed to clear int */
dbgprintf ("SDI %x\n", transfer_error[curr_card]);
semaphore_release(&transfer_completion_signal);
/* Ack the interrupt */
SRCPND = SDI_MASK;
INTPND = SDI_MASK;
}
#if 0
void dma_callback (void)
{
const int status = SDIDSTA;
transfer_error[0] = status & (S3C2410_SDIDSTA_CRCFAIL |
S3C2410_SDIDSTA_RXCRCFAIL |
S3C2410_SDIDSTA_DATATIMEOUT );
SDIDSTA |= S3C2410_SDIDSTA_CLEAR_BITS; /* needed to clear int */
dbgprintf ("dma_cb\n");
semaphore_release(&transfer_completion_signal);
}
#endif
static void init_sdi_controller(const int card_no)
{
(void)card_no;
/*****************************************************************************/
#ifdef MINI2440
/* Specific to Mini2440 */
/* Enable pullups on SDCMD and SDDAT pins */
S3C2440_GPIO_PULLUP (GPEUP, 6, GPIO_PULLUP_ENABLE);
S3C2440_GPIO_PULLUP (GPEUP, 7, GPIO_PULLUP_ENABLE);
S3C2440_GPIO_PULLUP (GPEUP, 8, GPIO_PULLUP_ENABLE);
S3C2440_GPIO_PULLUP (GPEUP, 9, GPIO_PULLUP_ENABLE);
S3C2440_GPIO_PULLUP (GPEUP, 10, GPIO_PULLUP_ENABLE);
/* Enable special function for SDCMD, SDCLK and SDDAT pins */
S3C2440_GPIO_CONFIG (GPECON, 5, GPIO_FUNCTION);
S3C2440_GPIO_CONFIG (GPECON, 6, GPIO_FUNCTION);
S3C2440_GPIO_CONFIG (GPECON, 7, GPIO_FUNCTION);
S3C2440_GPIO_CONFIG (GPECON, 8, GPIO_FUNCTION);
S3C2440_GPIO_CONFIG (GPECON, 9, GPIO_FUNCTION);
S3C2440_GPIO_CONFIG (GPECON, 10, GPIO_FUNCTION);
/* Card Detect input */
S3C2440_GPIO_CONFIG (GPGCON, 8, GPIO_INPUT);
/* enable external irq 8-23 on the internal interrupt controller */
INTMSK &= ~1<<5;
/* enable GPG8 IRQ on the external interrupt controller */
EINTMASK &= ~(1<<16);
/* Write Protect input */
S3C2440_GPIO_CONFIG (GPHCON, 8, GPIO_INPUT);
/*****************************************************************************/
#else
#error Unsupported target
#endif
/*****************************************************************************/
/* About 400KHz for initial comms with card */
SDIPRE = PCLK / INITIAL_CLK - 1;
/* Byte order=Type A (Little Endian), clock enable */
SDICON = S3C2410_SDICON_CLOCKTYPE;
SDIFSTA |= S3C2440_SDIFSTA_FIFORESET;
SDIBSIZE = SD_BLOCK_SIZE;
SDIDTIMER= 0x7fffff; /* Set timeout count - max value */
/* Enable interupt on Data Finish or data transfer error */
/* Clear pending source */
SRCPND = SDI_MASK;
INTPND = SDI_MASK;
#if 1
/* Enable interrupt in controller */
bitclr32(&INTMOD, SDI_MASK);
bitclr32(&INTMSK, SDI_MASK);
SDIIMSK |= S3C2410_SDIIMSK_DATAFINISH
| S3C2410_SDIIMSK_DATATIMEOUT
| S3C2410_SDIIMSK_DATACRC
| S3C2410_SDIIMSK_CRCSTATUS
| S3C2410_SDIIMSK_FIFOFAIL
;
#endif
}
static bool send_cmd(const int card_no, const int cmd, const int arg,
const int flags, long *response)
{
bool ret;
unsigned val, status;
(void)card_no;
#ifdef SD_DEBUG
get_regs (reg_copy);
#endif
/* A major bodge. For some reason a delay is required here */
mci_delay();
dbgprintf ("send_cmd: c=%3.3d a=%08x f=%02x \n", cmd, arg, flags);
#ifdef SD_DEBUG
get_regs (reg_copy2);
dump_regs (reg_copy, reg_copy2);
#endif
#if 0
while (SDICSTA & S3C2410_SDICMDSTAT_XFERING)
; /* wait ?? */
#endif
/* set up new command */
if (flags & MCI_ARG)
SDICARG = arg;
else
SDICARG = 0;
val = cmd | S3C2410_SDICMDCON_CMDSTART | S3C2410_SDICMDCON_SENDERHOST;
if(flags & MCI_RESP)
{
val |= S3C2410_SDICMDCON_WAITRSP;
if(flags & MCI_LONG_RESP)
val |= S3C2410_SDICMDCON_LONGRSP;
}
/* Clear command/data status flags */
SDICSTA |= 0x0f << 9;
SDIDSTA |= S3C2410_SDIDSTA_CLEAR_BITS;
/* Initiate the command */
SDICCON = val;
if (flags & MCI_RESP)
{
/* wait for response or timeout */
do
{
status = SDICSTA;
} while ( (status & (S3C2410_SDICMDSTAT_RSPFIN |
S3C2410_SDICMDSTAT_CMDTIMEOUT) ) == 0);
debug_r1(cmd);
if (status & S3C2410_SDICMDSTAT_CMDTIMEOUT)
ret = false;
else if (status & (S3C2410_SDICMDSTAT_RSPFIN))
{
/* resp received */
if(flags & MCI_LONG_RESP)
{
/* store the response in reverse word order */
response[0] = SDIRSP3;
response[1] = SDIRSP2;
response[2] = SDIRSP1;
response[3] = SDIRSP0;
}
else
response[0] = SDIRSP0;
ret = true;
}
else
ret = true;
}
else
{
/* wait for command completion or timeout */
do
{
status = SDICSTA;
} while ( (status & (S3C2410_SDICMDSTAT_CMDSENT |
S3C2410_SDICMDSTAT_CMDTIMEOUT)) == 0);
debug_r1(cmd);
if (status & S3C2410_SDICMDSTAT_CMDTIMEOUT)
ret = false;
else
ret = true;
}
/* Clear Command status flags */
SDICSTA |= 0x0f << 9;
mci_delay();
return ret;
}
static int sd_init_card(const int card_no)
{
unsigned long temp_reg[4];
unsigned long response;
long init_timeout;
bool sdhc;
int i;
if(!send_cmd(card_no, SD_GO_IDLE_STATE, 0, MCI_NO_FLAGS, NULL))
return -1;
mci_delay();
sdhc = false;
if(send_cmd(card_no, SD_SEND_IF_COND, 0x1AA, MCI_RESP|MCI_ARG, &response))
if((response & 0xFFF) == 0x1AA)
sdhc = true;
/* timeout for initialization is 1sec, from SD Specification 2.00 */
init_timeout = current_tick + HZ;
do {
/* timeout */
if(current_tick > init_timeout)
return -2;
/* app_cmd */
if( !send_cmd(card_no, SD_APP_CMD, 0, MCI_RESP|MCI_ARG, &response) ||
!(response & (1<<5)) )
{
return -3;
}
/* acmd41 */
if(!send_cmd(card_no, SD_APP_OP_COND, (sdhc ? 0x40FF8000 : (1<<23)),
MCI_RESP|MCI_ARG, &card_info[card_no].ocr))
{
return -4;
}
} while(!(card_info[card_no].ocr & (1<<31)));
/* send CID */
if(!send_cmd(card_no, SD_ALL_SEND_CID, 0, MCI_RESP|MCI_LONG_RESP|MCI_ARG,
temp_reg))
return -5;
for(i=0; i<4; i++)
card_info[card_no].cid[3-i] = temp_reg[i];
/* send RCA */
if(!send_cmd(card_no, SD_SEND_RELATIVE_ADDR, 0, MCI_RESP|MCI_ARG,
&card_info[card_no].rca))
return -6;
/* send CSD */
if(!send_cmd(card_no, SD_SEND_CSD, card_info[card_no].rca,
MCI_RESP|MCI_LONG_RESP|MCI_ARG, temp_reg))
return -7;
for(i=0; i<4; i++)
card_info[card_no].csd[3-i] = temp_reg[i];
sd_parse_csd(&card_info[card_no]);
if(!send_cmd(card_no, SD_SELECT_CARD, card_info[card_no].rca, MCI_ARG, NULL))
return -9;
if(!send_cmd(card_no, SD_APP_CMD, card_info[card_no].rca, MCI_ARG, NULL))
return -10;
if(!send_cmd(card_no, SD_SET_BUS_WIDTH, card_info[card_no].rca | 2, MCI_ARG, NULL))
return -11;
if(!send_cmd(card_no, SD_SET_BLOCKLEN, card_info[card_no].blocksize, MCI_ARG,
NULL))
return -12;
card_info[card_no].initialized = 1;
/* full speed for controller clock */
SDIPRE = PCLK / SD_CLK - 1;
mci_delay();
return EC_OK;
}
/*****************************************************************************
Generic functions
*****************************************************************************/
static inline bool card_detect_target(void)
{
/* TODO - use interrupt on change? */
#ifdef MINI2440
return (GPGDAT & SD_CD) == 0;
#else
#error Unsupported target
#endif
}
/*****************************************************************************/
#ifdef HAVE_HOTSWAP
static int sd1_oneshot_callback(struct timeout *tmo)
{
(void)tmo;
/* This is called only if the state was stable for 300ms - check state
* and post appropriate event. */
if (card_detect_target())
{
queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
}
else
queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
return 0;
}
void EINT8_23(void)
{
static struct timeout sd1_oneshot;
EINTPEND = (1<<16); /* ack irq on external, then internal irq controller */
SRCPND = (1<<5);
INTPND = (1<<5);
/* add task to inform the system about the SD insertion
* sanity check if it's still inserted after 300ms */
timeout_register(&sd1_oneshot, sd1_oneshot_callback, (3*HZ/10), 0);
}
bool sd_removable(IF_MD_NONVOID(int card_no))
{
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
dbgprintf ("sd_remov (hs) [%d] %d\n", card_no, card_no == CARD_NUM_SLOT );
return (card_no == CARD_NUM_SLOT);
}
bool sd_present(IF_MD_NONVOID(int card_no))
{
#ifdef HAVE_MULTIDRIVE
(void)card_no;
#endif
dbgprintf ("sd_pres (hs) [%d] %d\n", card_no, card_detect_target());
return card_detect_target();
}
/*****************************************************************************/
#else
bool sd_removable(IF_MD_NONVOID(int card_no))
{
#ifndef HAVE_MULTIDRIVE
const int card_no = 0;
#endif
(void)card_no;
/* not applicable */
dbgprintf ("sd_remov");
return false;
}
#endif /* HAVE_HOTSWAP */
/*****************************************************************************/
static void sd_thread(void) NORETURN_ATTR;
static void sd_thread(void)
{
struct queue_event ev;
/* TODO */
while (1)
{
queue_wait_w_tmo(&sd_queue, &ev, HZ);
switch ( ev.id )
{
#ifdef HAVE_HOTSWAP
case SYS_HOTSWAP_INSERTED:
case SYS_HOTSWAP_EXTRACTED:
{
int success = 1;
fat_lock(); /* lock-out FAT activity first -
prevent deadlocking via disk_mount that
would cause a reverse-order attempt with
another thread */
mutex_lock(&sd_mtx); /* lock-out card activity - direct calls
into driver that bypass the fat cache */
/* We now have exclusive control of fat cache and ata */
disk_unmount(0); /* release "by force", ensure file
descriptors aren't leaked and any busy
ones are invalid if mounting */
/* 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[0].initialized = 0;
if (ev.id == SYS_HOTSWAP_INSERTED)
{
/* FIXME: once sd_enabled is implement properly,
* reinitializing the controllers might be needed */
sd_enable(true);
if (success < 0) /* initialisation failed */
panicf("SD init failed : %d", success);
success = disk_mount(0); /* 0 if fail */
}
/* notify the system about the changed filesystems
*/
if (success)
queue_broadcast(SYS_FS_CHANGED, 0);
/* Access is now safe */
mutex_unlock(&sd_mtx);
fat_unlock();
sd_enable(false);
}
break;
#endif
}
}
}
static int sd_wait_for_state(const int card_no, unsigned int state)
{
unsigned long response = 0;
unsigned int timeout = HZ; /* ticks */
long t = current_tick;
while (1)
{
long tick;
if(!send_cmd(card_no, SD_SEND_STATUS, card_info[card_no].rca,
MCI_RESP|MCI_ARG, &response))
return -1;
if( (SD_R1_CURRENT_STATE(response) == state) )
return 0;
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* buf, const bool write)
{
int ret = EC_OK;
unsigned loops = 0;
struct dma_request request;
mutex_lock(&sd_mtx);
sd_enable(true);
set_leds(SD_ACTIVE_LED);
#ifdef HAVE_MULTIDRIVE
curr_card = card_no;
#endif
if (card_info[card_no].initialized <= 0)
{
ret = sd_init_card(card_no);
if (!(card_info[card_no].initialized))
goto sd_transfer_error;
}
last_disk_activity = current_tick;
ret = sd_wait_for_state(card_no, SD_TRAN);
if (ret < 0)
{
ret -= 20;
goto sd_transfer_error;
}
dma_retain();
while(count)
{
/* 128 * 512 = 2^16, and doesn't fit in the 16 bits of DATA_LENGTH
* register, so we have to transfer maximum 127 sectors at a time. */
unsigned int transfer = (count >= 128) ? 127 : count; /* sectors */
void *dma_buf;
const int cmd =
write ? SD_WRITE_MULTIPLE_BLOCK : SD_READ_MULTIPLE_BLOCK;
unsigned long start_addr = start;
dma_buf = aligned_buffer;
if(transfer > UNALIGNED_NUM_SECTORS)
transfer = UNALIGNED_NUM_SECTORS;
if(write)
memcpy(uncached_buffer, buf, transfer * SD_BLOCK_SIZE);
/* Set start_addr to the correct unit (blocks or bytes) */
if(!(card_info[card_no].ocr & SD_OCR_CARD_CAPACITY_STATUS))/* not SDHC */
start_addr *= SD_BLOCK_SIZE;
/* TODO? */
SDIFSTA = SDIFSTA | S3C2440_SDIFSTA_FIFORESET;
SDIDCON = S3C2440_SDIDCON_DS_WORD |
S3C2410_SDIDCON_BLOCKMODE | S3C2410_SDIDCON_WIDEBUS |
S3C2410_SDIDCON_DMAEN |
S3C2440_SDIDCON_DATSTART |
( transfer << 0);
if (write)
SDIDCON |= S3C2410_SDIDCON_TXAFTERRESP | S3C2410_SDIDCON_XFER_TXSTART;
else
SDIDCON |= S3C2410_SDIDCON_RXAFTERCMD | S3C2410_SDIDCON_XFER_RXSTART;
SDIDSTA |= S3C2410_SDIDSTA_CLEAR_BITS; /* needed to clear int */
SRCPND = SDI_MASK;
INTPND = SDI_MASK;
/* Initiate read/write command */
if(!send_cmd(card_no, cmd, start_addr, MCI_ARG | MCI_RESP, NULL))
{
ret -= 3*20;
goto sd_transfer_error;
}
if(write)
{
request.source_addr = dma_buf;
request.source_control = DISRCC_LOC_AHB | DISRCC_INC_AUTO;
request.dest_addr = &SDIDAT_LLE;
request.dest_control = DISRCC_LOC_APB | DISRCC_INC_FIXED;
request.count = transfer * SD_BLOCK_SIZE / sizeof(long);
request.source_map = DMA_SRC_MAP_SDI;
request.control = DCON_DMD_HS | DCON_SYNC_APB |
DCON_HW_SEL |
DCON_NO_RELOAD | DCON_DSZ_WORD;
request.callback = NULL;
dma_enable_channel(0, &request);
}
else
{
request.source_addr = &SDIDAT_LLE;
request.source_control = DISRCC_LOC_APB | DISRCC_INC_FIXED;
request.dest_addr = dma_buf;
request.dest_control = DISRCC_LOC_AHB | DISRCC_INC_AUTO;
request.count = transfer * SD_BLOCK_SIZE / sizeof(long);
request.source_map = DMA_SRC_MAP_SDI;
request.control = DCON_DMD_HS | DCON_SYNC_APB |
DCON_HW_SEL |
DCON_NO_RELOAD | DCON_DSZ_WORD;
request.callback = NULL;
dma_enable_channel(0, &request);
}
#if 0
/* FIXME : we should check if the timeouts calculated from the card's
* CSD are lower, and use them if it is the case
* Note : the OF doesn't seem to use them anyway */
MCI_DATA_TIMER(drive) = write ?
SD_MAX_WRITE_TIMEOUT : SD_MAX_READ_TIMEOUT;
MCI_DATA_LENGTH(drive) = transfer * card_info[drive].blocksize;
MCI_DATA_CTRL(drive) = (1<<0) /* enable */ |
(!write<<1) /* transfer direction */ |
(1<<3) /* DMA */ |
(9<<4) /* 2^9 = 512 */ ;
#endif
semaphore_wait(&transfer_completion_signal, 100 /*TIMEOUT_BLOCK*/);
/* wait for DMA to finish */
while (DSTAT0 & DSTAT_STAT_BUSY)
;
#if 0
status = SDIDSTA;
while ((status & (S3C2410_SDIDSTA_DATATIMEOUT|S3C2410_SDIDSTA_XFERFINISH)) == 0)
{
status = SDIDSTA;
}
dbgprintf("%x \n", status);
#endif
if( transfer_error[card_no] & S3C2410_SDIDSTA_XFERFINISH )
{
if(!write)
memcpy(buf, uncached_buffer, transfer * SD_BLOCK_SIZE);
buf += transfer * SD_BLOCK_SIZE;
start += transfer;
count -= transfer;
loops = 0; /* reset errors counter */
}
else
{
dbgprintf ("SD transfer error : 0x%x\n", transfer_error[card_no]);
if(loops++ > MAX_TRANSFER_ERRORS)
{
led_flash(LED1|LED2, LED3|LED4);
/* panicf("SD transfer error : 0x%x", transfer_error[card_no]); */
}
}
last_disk_activity = current_tick;
if(!send_cmd(card_no, SD_STOP_TRANSMISSION, 0, MCI_RESP, NULL))
{
ret = -4*20;
goto sd_transfer_error;
}
#if 0
ret = sd_wait_for_state(card_no, SD_TRAN);
if (ret < 0)
{
ret -= 5*20;
goto sd_transfer_error;
}
#endif
}
ret = EC_OK;
sd_transfer_error:
dma_release();
clear_leds(SD_ACTIVE_LED);
sd_enable(false);
if (ret) /* error */
card_info[card_no].initialized = 0;
mutex_unlock(&sd_mtx);
return ret;
}
int sd_read_sectors(IF_MD2(int card_no,) unsigned long start, int incount,
void* inbuf)
{
int ret;
#ifdef HAVE_MULTIDRIVE
dbgprintf ("sd_read %d %x %d\n", card_no, start, incount);
#else
dbgprintf ("sd_read %x %d\n", start, incount);
#endif
#ifdef HAVE_HOTSWAP_STORAGE_AS_MAIN
if (!card_detect_target())
ret = 0; /* assume success */
else
#endif
ret = sd_transfer_sectors(card_no, start, incount, inbuf, false);
dbgprintf ("sd_read, ret=%d\n", ret);
return ret;
}
/*****************************************************************************/
int sd_write_sectors(IF_MD2(int drive,) unsigned long start, int count,
const void* outbuf)
{
#ifdef BOOTLOADER /* we don't need write support in bootloader */
#ifdef HAVE_MULTIDRIVE
(void) drive;
#endif
(void) start;
(void) count;
(void) outbuf;
return -1;
#else
#ifdef HAVE_MULTIDRIVE
dbgprintf ("sd_write %d %x %d\n", drive, start, count);
#else
dbgprintf ("sd_write %x %d\n", start, count);
#endif
#ifdef HAVE_HOTSWAP_STORAGE_AS_MAIN
if (!card_detect_target())
return 0; /* assume success */
else
#endif
return sd_transfer_sectors(drive, start, count, (void*)outbuf, true);
#endif
}
/*****************************************************************************/
void sd_enable(bool on)
{
dbgprintf ("sd_enable %d\n", on);
/* TODO: enable/disable SDI clock */
if (sd_enabled == on)
return; /* nothing to do */
if (on)
{
sd_enabled = true;
}
else
{
sd_enabled = false;
}
}
int sd_init(void)
{
int ret = EC_OK;
dbgprintf ("\n==============================\n");
dbgprintf (" sd_init\n");
dbgprintf ("==============================\n");
init_sdi_controller (0);
#ifndef BOOTLOADER
sd_enabled = true;
sd_enable(false);
#endif
semaphore_init(&transfer_completion_signal, 1, 0);
/* init mutex */
mutex_init(&sd_mtx);
queue_init(&sd_queue, true);
create_thread(sd_thread, sd_stack, sizeof(sd_stack), 0,
sd_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU));
uncached_buffer = UNCACHED_ADDR(&aligned_buffer[0]);
#ifdef HAVE_HOTSWAP
/*
* prepare detecting of SD insertion (not extraction) */
unsigned long for_extint = EXTINT2;
unsigned long for_gpgcon = GPGCON;
for_extint &= ~0x7;
#ifdef HAVE_HOTSWAP_STORAGE_AS_MAIN
for_extint |= 0x2; /* detect falling edge only (0 means SD inserted) */
#else
for_extint |= 0x3; /* detect both, raising and falling, edges */
#endif
for_gpgcon &= ~(0x3<<16);
for_gpgcon |= (0x2<<16); /* enable interrupt on pin 8 */
EXTINT2 = for_extint;
GPGCON = for_gpgcon;
#endif
initialized = true;
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];
}
/*****************************************************************************/
#ifdef CONFIG_STORAGE_MULTI
int sd_num_drives(int first_drive)
{
dbgprintf ("sd_num_drv");
#if 0
/* Store which logical drive number(s) we have been assigned */
sd_first_drive = first_drive;
#endif
return NUM_CARDS;
}
void sd_sleepnow(void)
{
}
bool sd_disk_is_active(void)
{
return false;
}
int sd_soft_reset(void)
{
return 0;
}
int sd_spinup_time(void)
{
return 0;
}
#endif /* CONFIG_STORAGE_MULTI */
/*****************************************************************************/
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